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    > Winter Science | Stars, Comets and Meteor Showers

    Winter Science | Stars, Comets and Meteor Showers

    For Thanksgiving, we stayed at a remote youth hostel at the back of a valley between two mountains in the north of England. When you’re that far from everything and the weather is clear, you’re the luckiest person in the world with a shimmering sea of bright stars up above and not a single human light to create light pollution. The cool winter science thing about the night sky is that you get a lot more night to watch stars, comets and meteor showers. As early as 8pm (even earlier if you live far north), you can spot Orion over the horizon, find a few constellations and trace the Milky Way above your head.

    On a clear day, this was a picture of the sky just before sunset. Blue skies, not a single cloud. Optimal conditions for stargazing.

    Winter science Stars

    The picture shows the same sky three hours later, around dinnertime. Can you spot the shooting star? We saw quite a few, as well as satellites and popular constellations.

    Winter Science Stars 8pm

    Interestingly, there are very good reasons to make winter your astronomy and stargazing season with kids. Check out these fun facts.

    Winter Science Fact #1 | Stars are Brighter in Winter

    Winter Science Galaxy
    On June, July and August evenings, we look toward the galaxy’s center as indicated by the red arrows. On December, January and February evenings, we look away from the center, as indicated by the blue arrows. Other features, including our galaxy’s primary spiral arms and the sun’s location in the Orion Spur, are also shown. Artist’s illustration via NASA/JPL/Caltech/R.Hurt.

    During the Northern Hemisphere winter (Souther Hemisphere summer), the part of Earth we are standing on is facing into the spiral arm of the galaxy to which our sun belongs. If we were on the doorstep on a house with lights inside and in the garden, we would be looking out towards the garden, away from the house.

    Since this spiral arm has very bright stars that are relatively close, we tend to see them “brighter” than we usually would, because we’re looking away from the center of the galaxy with fewer stars in the background.

    Winter Science Fact #2 | The Prisoner of Azkaban shines in the Winter Sky

    Winter Science Sirius

    Sirius Black, Harry’s godfather, is named for the brightest star in the winter night sky–Sirius.  Also called the dog star, Sirius is the brightest star in the constellation Canis Major, one of Orion’s hunting dogs. In the Harry Potter books, Sirius Black can take the form of a black dog.

    Winter Science Stars

    The good news is, during winter, Orion the Hunter is very visible to the naked eye and so is Sirius. Here is how to find the bright star that inspired Harry Potter’s godfather’s name.

    • In the northern hemisphere, look to the southwest. In the southern hemisphere, look to the northwest.
    • Then, find the Belt of Orion. The Belt of Orion is composed of three very bright stars in a line, relatively equidistant from one another. They’re also known as the Three Sisters. The Belt and Sirius lie within neighbor constellations, so knowing where the Belt is will help you find Sirius.
    • Follow a direct line from the Belt southwest to a very bright star. That’s Sirius.

    For what it’s worth, another star of the Canis Major constellation is called Bellatrix–as in, Bellatrix Black Lestrange.

    Winter Science Fact #3 | In Winter, Follow this (Shooting) Star

    As I said, we saw several shooting stars that night in the sky. Though August’s Perseids are the most famous meteor showers, winter shows a continous period of heavy meteor activity with 50% of the meteor activity of the year crammed into 2 months. Worth a try, right? In chronological order, you can see the following meteor showers:

    • The Orionids – second half of October
    • The Taurids – October and November
    • The Leonids – mid-November
    • The Geminids – mid-December
    • The Ursids – mid-December
    • Quadrantid – January

    Winter Science Fact #4 | Winter Skies are Clear and Sharp

    Winter Science Stars

    Baby, it’s cold outside, but winter is a great time to go out with a hot water bottle and gloves on a clear night. Of course, Winter Science fact #1 explained how we are facing the outside of our galaxy and therefore, see winter stars brighter than summer stars. There is, however, another reason why winter skies are clear and sharp. Because cold air doesn’t hold as much moister as warm air can, the warm moisture atmosphere of summer is thicker and summer skies often have a “hazy” quality to them. On the other hand, the crisp, cold winter skies holds less moisture and is indeed, a lot sharper as seen from Earth. If you don’t have snowy mountains nearby, is there a desert where you can go camping? Deserts are the ultimate place for starry skies. Just imagine in winter!

    Winter Science Fact #5 | See Northern Lights this Year

    We’ve all seen incredible pictures of Northern Lights or Aurora Borealis over frozen fjords or snowy landscapes. Winter is indeed the season for Northern Lights. These phenomenons occur close to the Arctic Circle when highly-charged electrons from solar winds collide with the atmosphere around the North Pole. Amongst the best places to see Northern Lights, you will find:

    • Norway
    • Iceland
    • Sweden
    • Finland
    • Canada
    • Alaska
    • Ireland
    • Scotland
    • Greeland

    You’ve got until February to plan a Northern Lights family vacation. Can winter science be more cool than dancing ribbons in the sky?

    More on Winter Science

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