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Science Gallery & Planetarium

Science Gallery & Planetarium


Solar Eclipse This Summer, Part 1: Planning

Although summer may feel like it's a long time from now, it's not too early to start planning for at least one summer blockbuster event. On Monday, August 21, 2017, the moon will pass in front of the sun, causing a solar eclipse which will be seen all across North America. For a narrow line which runs across the central United States, the eclipse will be total: the moon will completely cover the bright part of the sun, providing a couple of minutes of the most amazing sight nature has to offer on this planet. For the rest of the continent, the eclipse is partial: the moon covers up only a part of the sun - still interesting and amazing, but not the show-stopper that a total eclipse is.

If you want to travel to the center line to see totality, you'd better plan on doing some driving. The path is about 10 hours south of Winnipeg at its nearest,  assuming you drive. Flying cuts this time somewhat, but you'll still need a vehicle the day of the eclipse, because all of the hotels along the path of totality have been booked for several years. This is the first total solar eclipse that has crossed North America since 1991, so folks have been planning for quite a while for this event. At this point you're looking at staying a few hours away and then driving to the center line the morning of the event. Although this might seem inconvenient, it does provide you with the flexibility to travel based on the weather. Clear skies = beautiful view of total eclipse; cloudy skies = nothing to see.

Over the coming months, we'll provide more details on the eclipse event itself, including what local viewing options there are and how you can see the eclipse safely yourself. The Planetarium is not running a tour for this event, but we will be hosting programming and viewing of the eclipse from Winnipeg, where the sun will be 70% eclipsed. The Planetarium and Science Gallery will be running eclipse programming starting in July, so by eclipse day you'll be well-prepared no matter where you choose to observe from.

The view of a total solar eclipse is well worth some travel. I saw the last one visible from Manitoba, on February 26th, 1979, and it was so inspiring that it set the course of my life in astronomy and science education. If you do decide to include the eclipse in this summer's travel plans, check out eclipsophile.com's great page on the event. Put together by veteran eclipse chaser and meteorologist Jay Anderson and astronomer (and former Winnipegger) Jennifer West, this site is full of the details you need to decide where to observe the Great North American Eclipse.


Earth-like planet discovered around closest star

A new planet has been discovered outside our solar system. That wouldn’t normally be big news, since astronomers have discovered about 3,200 exoplanets, or planets that orbit stars other than the Sun. This one is rather special, though.

First, it’s about the size of our planet earth. That generally means it is made up of the same sort of things that the earth is made up of – rocks, not gasses. It’s probably solid, like our own planet.

Second, the new planet orbits its star in the “Goldilocks zone”. That’s the area that isn’t too hot or too cold for liquid water to exist. That means, if the planet has an atmosphere, that there could be liquid water on its surface – and that opens up the possibility of life.

Even more exciting: this new planet orbits the closest star to the Sun – it’s literally as close as a planet could be to our solar system. The star is called Proxima Centauri, which is part of the Alpha Centauri star system. It’s about 4.2 light years away – so, it’s still REALLY far away. If you tried to go there in any of the rockets we have now, it would take more than 100,000 years to get there. Long trip, better bring a book.

But, radio waves travel at the speed of light – and so a radio signal could get there in about 4.2 years. (That's basically the definition of the term "light year" - the distance that a beam of light travels in one year. It works out to about ten trillion kilometers, give or take.)

Here’s an artist’s conception of what it would look like from the surface of Proxima B. The bright star is Proxima, and the two fainter ones in the background are Alpha Centauri A and B, which are part of the same triple-star system.

The new planet was found by European astronomers, using a technique first pioneered by Canadian astronomers Gordon Walker, Bruce Campbell and Stephenson Yang back in the 1970’s at the Dominion Astrophysical Observatory in Victoria, B.C. The technique, which measures the wobble in the star due to the gravity of an unseen planet, has only recently become precise enough to detect tiny earth-sized planets.

As of now, we have no idea if the planet has water, or an atmosphere, or aliens, or bacteria, or anything. We just don’t know. What we do know is that there's nothing about the planet which automatically rules out the possibility of life. It has the right temperature range for water, its star isn't too violent, there are no other factors which tell us that no life can exist there.

We may have discovered our nearest neighbours in the galactic metropolis. Or, it may just be an empty lot next door to us that we can expand into. Either way, this is probably the most significant exoplanet discovery thus far, and seeing what cmoes next will be exciting.




Perseid meteor shower shines above Manitoba

Perseid meteor shower – updates!

Updated 8 August 2016 9:29CDT

Every year, the annual Perseid meteor shower occurs around August 11th and 12th. This year, though, is predicted to be a much more active shower than in previous years. What can we expect, why is it happening, and how can you see it yourself?

As the earth orbits the sun, it crashes into bits of rock, ice, and dust which are left over from the formation of the solar system. These tiny fragments hit the earth’s atmosphere at cosmic velocities, quickly heating up due to friction and vaporizing tens of kilometers above the ground in a flash of light. These flashes are called meteors, and are also known as shooting stars or falling stars. On a typical night, if you can avoid any sources of light from cities and the moon, you can see a handful of these every hour. The trick is, to be watching the sky for that entire hour, because meteors are literally visible for a second or two and then gone. Don’t blink!

In addition to these sporadic meteors, several times a year the earth travels through a denser trail of dust left behind by a comet. Comets are icy bodies that orbit the sun, growing a long tail when they get close enough to the sun. These comets leave a trail of ice and dust in their wake, and when the earth passes through the trail we get many more meteors than usual. This is called a meteor shower, and they occur about the same time every year. One of the best known showers is the Perseids, which usually peak around August 11th and 12th.

This particular year, the earth is predicted to be going through an especially dense part of the meteor trail left behind by Comet Swift-Tuttle. This means we can expect more meteors than normal this year for the Perseids.

So what does this mean?

First, don’t be mislead by some of the images floating around social media – the stars won’t fall like rain. If you go out at the right time, you will see a lot of meteors, but a lot depends on your local conditions. Here’s how to maximize your chances.

  1. Meteor showers always are best after midnight. Due to the geometry involved, when your part of the earth is experiencing “evening”, the meteors are hitting a glancing blow. Not many can catch up to the Earth in its orbit, so you will see fewer meteors than the predicted amounts. The silver lining here is that the few meteors you will see are usually the bright fast ones that leave a trail across the sky. Before-midnight viewing is definitely about quality, not quantity.
  2. Avoid city lights. Meteors are faint compared to streetlights, advertising signs, and other artificial lights. From inside the city, you may see a handful of meteors, but you’ll miss most of them. The best views are to be had from under dark country skies. Head out of the city, and set up with your back towards the brightest lights you can see.
  3. Avoid telescopes. Meteors can happen anywhere around the sky and only last for a few seconds – you won’t have time to point a telescope at them. Telescopes have very small fields of view, so you are only looking at a fraction of the sky at once. This is one type of astronomy that is perfect for the low-tech approach. The most useful piece of equipment is a reclining lawn chair or blanket to lay back on.
  4. Avoid the moon. This is usually the big variable between one year’s shower and the next. If the moon is full, you have a big source of light pollution that you can’t just drive away from. Luckily, this year, the moon is not full, but it’s close. For Manitobans, the moon will set around 1 a.m. on the night of the 11th/morning of the 12th, giving us a solid three hours of dark skies until the twilight begins.

Suggested viewing plan: Head out of town the evening of Thursday, August 11th. Find a palce where you can observe that avoids as many lights as possible. Ensure that you’re not too near a road or other hazard. (Make sure you choose a place that is not private property unless you have permission from the owner!) Set up your lawn chair with your back facing towards the brightest lights you can see, and just look up. Keep all lights off, so you eyes can adapt to the dark. If you look at a light (like your mobile device) for even a split-second, you will kill your night vision for several minutes. Even if the device is set to red, it is much too bright. Watch the sky for as long as you can, and just count the meteors!

If you want to try capturing a meteor image on your camera or turn your observations into science, visit the International Meteor Organization’s web page – they have further details on how to make meteor counts and take images of meteors.


Transit of Mercury – Monday, May 9th, 2016

This Monday, Manitobans can witness a rare astronomical event that at once demonstrates some of the most important principles of the Universe. All you need is clear skies... and a special telescope. Luckily, the Planetarium has you covered on that second one! (More on that later.)

As the planets orbit the Sun, their position in our sky changes. Right now (in May 2016), Jupiter is visible in the evening, with Mars and Saturn both rising later in the night. (See our Manitoba Skies blog for details.) There are two planets that orbit closer to the Sun than our planet Earth, and so they never appear late at night - from our point of view, they always appear close to the sun in the Sky. These two planets, Mercury and Venus, are usually visible soon after sunset or just before sunrise, depending on their location in their orbit. Venus is the bright "evening star" or "morning star" that most people have seen (if not identified), but Mercury is more elusive. Being closer to the sun, it is often very low in the sky, and only visible for a couple of weeks before its orbit carries it too close to the sun to be seen.

However, this orbital geometry that works against us has one big benefit: every so often, Mercury or Venus will be seen actually silhouetted against the sun's blinding surface. This event, called a transit, only happens a few times a century for Mercury and even less often for Venus. This MOnday, it's Mercury's turn to transit the Sun. Here's how to watch.

FIRST: NEVER LOOK AT THE SUN WITHOUT PROPER EYE PROTECTION. "Proper" means a special solar filter purchased especially for solar viewing - eclipse glasses or a specialized telescope filter. NOT SAFE: sunglasses; CDs/DVDs; smoked glass; or any of that stuff. If you don't have a special solar filter you spent at least $100 on, it's probably not safe. Do not risk your eyesight when there are easier ways to see this event without risk.

Mercury is too small to see crossing the sun without some level of magnification, so those cardboard eclipse glasses won't be much help for this event. (But save them - there's a solar eclipse in August 2017 you'll need them for!) This means, you need a telescope or pair of binoculars, which means you also need a specialized solar filter, or use an indirect method.

HERE is how to turn your ordinary household binoculars into a safe transit viewer.  NOTE: Make sure you follow the safety warnings on the video - watch right to the end. This clip was produced for the transit of Venus, but it works for this event and for general viewing of sunspots as well.

If you don't have your own way to view the transit, there's still hope. You can join us at the Museum - the Galleries, Planetarium and Science Gallery are closed Mondays, but our staff will be outside behind the Museum (weather permitting) near the corner of Lily Street and James Avenue to view the transit, and you're welcome to join us. You can also watch the event online from various sites around the world: search for "mercury transit live webcast" for several options.

Watching the transit of Mercury lets you witness the clockwork of the solar system first-hand. Over the course of the day, Mercury's tiny disk will cross the Sun, carried by its orbital motion. From this simple observation, you can see that Mercury orbits the Sun and is closer to the Sun that we are. Over time, astronomers also noticed that timings of the transit of Mercury were off slightly by what we would expect just based on classical gravitation effects; it would remain for Albert Einstein and his theory of General Relativity to explain the discrepancy. The transit you are seeing this Monday is one of the strongest and most reliable proofs that Einstein's view of the Universe is correct.

All that from watching  a little black dot on the sun today!



Manitoba Skies for March 2016

Although the weather hasn't noticed yet, spring is on the way. March brings the Vernal Equinox, the official start of spring in the northern hemisphere. It also brings excellent views of the two largest planets in our solar system, a solar eclipse we won't see from Manitoba, and a chance to catch the winter constellations in slightly warmer conditions.

Read all about the events visible in Manitoba Skies this month on the Planetarium's Current Night Sky page.


Five planets; Nine planets?

This has been a busy week for solar system news. For early risers, you can see all five of the naked-eye planets at the same time before sunrise. This week also saw the announcement of some new research suggesting there may be an undiscovered planet out there, way out past Neptune.

We'll start with the easy one. There are five planets in our sky that can be easily seen with the unaided (or "naked") eye - without a telescope or binoculars, but most of the time only two or three are visible at any given time. For the next several weeks, though, you can see all five at once. Just wait for a clear morning, get up early, and head to a location where you have a clear horizon to the south and southeast. You'll want to observe about 45 minutes before the sun comes up, while the sky is still dark enough.

The first thing you will notice is Venus, shining brightly in the southeast. Venus has been visible before dawn for months now, and since it is the brightest object in the sky after the Sun and Moon, a lot of people have noticed it in the southeast as they get up for work or school before the sun rises. The next-brightest object in the sky is the planet Jupiter, which was close to Venus last fall but has since migrated across the sky towards the southwest. That's two planets.

In between Venus on your left and Jupiter on your right, there are a bunch of bright-ish objects. About halfway between the two, and higher up in the south, is a fairly bright object that you might notice has a slightly red-orange hue. That's Mars, planet number three on our list of targets.

Between Mars and Venus is number four: the ringed planet Saturn. Saturn's rings aren't visible without a telescope, but it is the most distant planet you can see with your unaided eye, at over 1.5 billion kilometres away from Earth.

Number five on our list is the most difficult one. The planet Mercury is tough to see, because it is so close to the sun we can only see it in the brightening twilight sky. Mercury appears to the lower left of Venus and very close to the horizon. As the days pass, it will rise higher in the sky as it orbits the sun, and then drop back down below the horizon again. You probably will only have a couple of weeks to see Mercury unless we have very clear skies and you have very good eyes, since the lower it gets the harder it will be to find. Binoculars can help you track it down in the twilight.

If you want to add a sixth planet, just look around: the Earth is a planet, too. And the moon will move through the seen in the first week of February, along the path from Jupiter to Mercury in our sky. It's a great time to watch the morning sky!

Now, the other "planet" announcement this week, which suggests a new planet has been "discovered". It hasn't - at least, not yet. As usual, the social media sites blow everything out of proportion. Some new research suggests that some of the odd observations of objects at the very edge of the solar system could be explained if there were an undiscovered planet orbiting the sun at an incredible distance, far beyond Neptune. The trouble is, we don't have a lot of data on what's out there, so there are many possible explanations for the strange stuff we're seeing. Definitely a story worth following, but don't change the etxtbooks just yet.



Manitoba Skies: January 2016

January has a number of interesting events in the night sky, easily visible by anyone who can see the sky. If you get up before sunrise this month, you can see four other planets (plus the Earth) with your unaided eye! Venus, Jupiter, Mars and Saturn are all there in the pre-dawn skies, just waiting to be discovered. Over the next month, they all move in their orbit around the Sun, changing their apparent positions and getting closer together or farther apart in a complicated pattern.

For details on all the things you can see this month in Manitoba Skies, visit the Planetarium's "Current Night Sky" page and start your own cosmic explorations!



Perseid Meteor Shower in progress!


Every August, our planet passes through a giant dust bunny in space. The dust comes from Comet Swift-Tuttle, a “dirty snowball” that orbits the sun in an oval path. The comet itself is not terribly impressive, but it leaves so much dust in our Earth’s path that the Earth spends several days sweeping up millions of dust particles like a planetary broom. Each piece of dust hits the earth’s atmosphere at incredible speeds, and frcition with the air causes the dust to vaporize in a flash of light at altitudes of dozens of kilometers. All the way down here on the ground, we can see each speck of dust’s death throes as a “falling star” or “shooting star”. Astronomers prefer the correct term: “meteor”.

There are actually meteors hitting earthy all the time. On any clear night, if you watch the sky carefully you’ll see a few. Under perfect dark conditions, you can expect 5-10 meteors per hour on just about any night, caused by the random dust particles floating around the solar system. In August, though, earth hits that dust bunny, and we see many more meteors – a meteor shower. Despite the name, the sky doesn’t fill with shooting stars; you may see one every minute or two, though.

The Perseids are just one of a dozen or more annual meteor showers which are visible. Named for the constellation of Perseus, where they appear to radiate from, the Perseids are the best-known meteor shower because they occur in August, when sitting outside all night in a field is survivable. If you want to get technical, the Geminids of December are a better event, but Manitobans certainly recognize the challenges involved in observing them without losing fingers and toes to frostbite.

Observing the Perseids: Meteor showers are the ultimate low-tech observing event. You don’t need a telescope or even binoculars; your main piece of gear is a reclining lawn chair or blanket. You want to get away from city lights if you can – street lights will make it harder to see the fainter meteors, and really cut down on the number you see. Face the darkest part of the sky, and just look up and watch the stars. Every so often, you will see a meteor streak by.

The shower is active now, but it’s a slow build-up. The peak is on the early morning of August 13th, but you should see meteors for several days before and after that. Meteor showers like the Perseids are always best after midnight – you might not see many in the evening hours. This year, the moon is New on the 14th, and so won’t drown out the meteors with its light.



Solar Eclipse visible from Manitoba

On Thursday afternoon this week, Manitobans will be treated to an uncommon celestial spectacle: a partial eclipse of the sun. Beginning just after 4 o'clock in the afternoon, the moon will move between the Sun and Earth, casting its shadow onto our planet and blocking out part of the sun as seen from earth. While uncommon and interesting to watch, solar eclipses have some particular issues which require some safety precautions.

Safety first: YOU SHOULD NEVER LOOK DIRECTLY AT THE SUN WITHOUT SPECIAL PROTECTION. The protection we're talking about here is not sunglasses, but  special solar filter material which is the equivalent of the densest welder's goggles that exist. the best way to observe the sun at any time (and especially during an eclipse) is to purchase special "eclipse glasses". This silver-colored Mylar filters are designed to filter out all of the harmful light and other radiation from the sun, and provide you with a safe view. During an eclipse, the sun is no more or less dangerous than it is every other day - but then, no one usually stares at the sun for very long except when there is an eclipse to watch.

The following materials are NOT safe solar filters: sunglasses, CDs, Mylar balloon material, exposed photographic film, smoked glass, or any other material not specially-designed for solar viewing.

You should also never point a telescope or binoculars at the sun without a special filter that goes over the front of the instrument. Telescopes and binoculars focus so much sunlight that they will instantly set fire to anything put at the eyepiece - this includes paper, pencils, eclipse glasses, your head... you get the idea.

Having said all of that, a solar eclipse is a great event to watch: you can actually see the clockwork of the heavens ticking forward as you watch. The motion you see if the orbital motion of our moon, a rock hurtling around our planet at about 3,600 km/h. It really is worth watching, you just need to do so properly.

To help, the Museum has brought in safe solar eclipse glasses which are available for $3 a pair at the Museum Shop and Museum Box Offices. You can also head to the public observing session being hosted by the Royal Astronomical Society of Canada at Assiniboine Park's picnic area, where safely-filtered telescopes will give you an up-close view of the action. Finally, in case it is cloudy here in Manitoba, there will be online feeds from across North America to watch on the web.

Now, to the details...

For Manitobans, the eclipse begins about 4:08 p.m., when the moon begins to move in front of the sun starting on the upper left side. At this point, the sun is over in the southwest and fairly low, so you will want o have a good view in that direction. Over the next hour or so, the moon will block out progressively more of the sun's visible face. At 5:24 p.m., we are near the peak of the partial eclipse. From Winnipeg, 60% of the sun will be covered, while in northern Manitoba the eclipse is close to 70%.

Unfortunately, that is about as good as it gets - there will be no "total" phase of this eclipse, where the sun is totally blocked by the moon (as it was in 1979 for Winnipeggers). The alignment between sun, moon and earth is not exact, and so the total phase misses earth completely this time. After 5:24 p.m., the moon will start to move off the sun's disk. The sun will actually set before the eclipse is over, however, so you should have a chance to capture a very unusual picture: a partially-eclipsed sun setting. Sunset in Winnipeg is about 6:22 p.m., while around Thompson, Manitoba it sets about 6:12 p.m.

SAFETY AGAIN: I can't stress how important it is to observe this event safely. Use eclipse glasses. If you have older ones from a previous event, discard them if they have *any* scratches or pinholes in them. Your eyesight is worth more than $3. If you want a close-up view, go to the RASC's observing event - that's where I will be.


UPDATE: Lunar Eclipse TONIGHT!

The total lunar eclipse I wrote about on Monday will occur tonight, after midnight and into the pre-dawn hours of Wednesday morning - you can find the original article here, with times and observing suggestions. The weather for the city of Winnipeg does not look great, but there looks to be clearer skies to the west. Visit Winnipeg's Clear-Sky Clock for hour-by-hour cloud forecasts for astronomy. Good luck!

Scott Young

Manager of Science Communications and Visitor Experiences

See Full Biography

"Scott oversees Science Gallery exhibits and Planetarium shows, and collaborates on content development for Museum Galleries exhibits. He has been an informal science educator for twenty years, working in the planetarium and science centre field both at The Manitoba Museum and also at the Alive G. Wallace Planetarium in Fitchburg, Massachusetts. Scott is an active amateur astronomer and a past-President of the Royal Astronomical Society of Canada."