Why Do Stars in the Night Sky Change With the Seasons? : Planets, Comets, Constellations & More

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The stars in the night sky change with the orbit of the Earth around the sun due to the position of the Earth during its travels. Find out why the stars in the night sky change with the orbit of the Earth with help from a longtime experienced educator in this free video clip.

Expert: Eylene Pirez
Filmmaker: bjorn wilde

Series Description: If you want to learn more about life on Earth, at some point you're going to have to look to the stars for guidance. Get tips on the solar system and our galaxy with help from a longtime experienced educator in this free video series.

[joshuamartinez]

There just one problem. From what i have observed the night sky doesn't change. Might vary a bit, but basically same shy .She did explain exactly what should occur. But no

[spordniar]

I am more intrigued to find out why are the relative positions of the stars in the night sky remain pretty much the same.

[FlatjePlanet]

When i walk with my dog i see the same stars every day. Sometime what lower, sometimes what higher.... But the same stars tho...

[a]

am i the only one trippin on how she's writing backwards without even thinking about it???

[michiganmonsters]

Okay but why do we see the big dipper all year round?

[jesusquinonez]

OK, it makes total sense, now, isn't our whole solar system moving across the galaxy as well? That theory would only work if we're stationary in the exact same sport every year. So if we're moving across the galaxy, why do we continue to see Orion, big deeper, etc .

[Sean-hk]

Um...the stats are in the exact same spot they were when i was a kid. Im 42 now. So what you said makes no sense.

[damiengiroux]

For the people who were wondering. If you're in the north you can see the northern stars year round because they are above the earth. If you're in the south you can see the southern stars year round because the're underneath the earth.

[dannyrose]

I swear I see the same stars all year round

[Jarheay]

But why do we see the big dipper every night all year?

[fepeerreview]

This was very good but I wish it had been one minute longer. She needed to explain the gradual change.
1:20 Notice that when Pegasus is high in the sky at midnight in the Spring (top image) you can see Orion and Lyra on the horizons at the same time. So we see the same stars throughout much of the year, but in different parts of the sky depending on the seasons.

[AnadunePictures]

Can you explain why the Pole star is always there?

[DOCWHOK]

Please explain why I can see the Southern Cross tonight, but in 6months time, when earth is on the other side of the sun, and I'm facing 180°, the Southern Cross IS STILL SOUTH !

[svsc]

Guys she was JUST pointing out the "changing" starts or better said the ones we are not able to see on some seasons. What you see in her video is a 2D Top down view of earth orbiting Sol. So she is NOT talking about the circumpolar starts. Those are the ones u can always see at the night sky, assuming u don´t have a lot of light waste around (big citys). Obviously those Stars are again different form the viewers position, like Northern Hemisphere (London) or Southern-hemisphere (Cap Town). If u break a school globe in 2 pieces around the equator u got 2 hemispheres). All that works course the axial tilt of the Earth is between 22.1° and 24.5°.

So if you have a school globe at home place him on a table and walk with a flash light (SOL) around the globe, may some one turns it while u doing it but anyway, imagine there are little dudes on the globe, you will notice, no matter your position( Sol), that peoples of the north or south part should always be able to see the most part of you´r ceiling or you´r table. But not the bookshelf behind ya all the time or the window or your girlfriend making fun at so i hope everyone is now able to understand how it works and that she was not talking about the circumpolar starts.

Oh and for the smartarses...yes i know that the earth orbit inclination is not 0.0° and the distance is changing also. Therefore it has also an influence on viewable starts on the sky but this is just an easy explanation....

[sakaeharumikazumi]

Do the stars move of it is just the earth, or both?

[WillowRook]

This is so brilliant! I just read three articles but couldn't visualise it. A simple diagram can do what a lengthy text cannot. Thank you.

[engciso]

Could someone please give me a more details about how we see some constellations the whole year long? I'd like to be more informed about that. thank you.

[sidneyhall]

Why is the northern star always there. If I fly to different parts of the planet I can see it and it is there all year round. Orion's belt is always there.

[marcdc]

What seems to work to explain this phenomenon...
we revolve around a stable axel, facing the polestar... this star is always in the same position, even at daytime
constellations rise and set on the sky... we only see a percentage of the stars at one given glance...
If the sun would not be there, in 24 hours we would see all there is to see from our altitude on the planet, every day...366 times in a year of 365 days...

[christoprighteous]

Why are the same stars always there day and night? If the sun was darken we would see the same star we see at night just rotated. Wouldnt we see new stars and constellations ?