Space Science: Colors of the Stars - Coma Niddy University

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Learn the reason for the color of the stars and why they all look the same at night.

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Transcript:

Previously we learned that the color of the Sun is white
But in addition to white stars come in different colors such as blue orange and red.
So how do the stars get their colors?

Well the color of the stars depends on the temperature of its surface
The Sun has a surface temperature of about 6,000 Kelvins
Red Stars like Betelgeuse has a surface temperature of about 3,500 kelvins
And blue stars such as Rigel have a surface temperature of 10,000 kelvins

Cooler stars tend to be red and once you turn up the heat to make them hotter they tend to be white or blue

But now if all of the stars have different colors why is it that when we look at the night sky all of them appear to be white?

The reason for this is because of our eyes
Our eyes have two sensors that help us see
We have cone cells and rod cells
Cone cells detect color and rod cells detect shades of grey and motion.
Guess which one of these is most active at night

At night time our eyes rely on our rod cells because there isn't enough light to stimulate the cone cells.
So when we look at the stars we don't see their color. We can only see their brightness
And this is why all of the stars appear to be white in the night sky

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Sources:

Universe Today
Bad Astronomy
Visual Expert

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[squidwardtentacles]

Short informative and straight to the point. Only ad is at the end of the video.

This is how all videos should be.

[mike.likes.science]

Glad you liked it. Thanks for asking about the Color of the Stars =)

[mike.likes.science]

Using a telescope or binoculars you'll be able to see the colors better since it will focus more of the stars' light into you eye =) You're right. Doppler affect does affect the color of the stars but we can't see it with the naked eye. But don't worry, I will further answer your question in the next episode!

[SquidDesign]

I do see a slight tint in some stars, usually either bluish, or pinkish on a clear night (or at least I think I do). But doesn't the speed of stars moving toward or away from us also affect their color? Doppler effect? Am I wrong about that? Thanks.

[AshShams]

Just the right video i was looking for💪🏼 thx mate

[ShouttoJesusChrist]

Good morning everyone. Hope your have a great day.

[mike.likes.science]

Great question =) You will find out soon!

[pattye.]

What is the crucial item that determines what kind of star will be formed?

[aditya_saha]

if the atmosphere scatters the suns' colour from white to yellow/red why dont it does the same thing for the stars?

[ripleywolfwood]

This is great. Nice and simple to explain to my five year old how stars have different colors. Now Betelguese is in the Orion constellation, correct? I am able to tell one of those is red... why is that?

[DoctorOblivian]

is it possible for stars to be other colors such as green or purple?

[nidhisharma]

Does the light from the stars ( blue and violet) get scattered, too. Then why do we ever see actual white coloured stars

[brendanquinn]

So why do some stars change from red to blue to white, all in a matter of seconds ?

[MassiveMate]

Is this information published anywhere in media? Or in school books?

[nidhisharma]

Should have mentioned the colour receptors

[abid]

It's a strange thing that I found a bright star that actually changes its colour in one second from blue to Orange and returns to White .how can you explain that ؟!!

[melbinbinu]

can you do suff about supernovas and what would happen if the biggest star in the universe exploded and what if all of them exploded stuff like that pls. oh and how many supernovas it would take to destroy the universe

[petermartin]

Why are things round like the sun, moon, earth are the stars round as well, many thanks.

[bishoprobinson]

If we didnt have thoughs cells they would be red, blue and wite right

[simplyallegra]

Why do I see a golden star at night amidst other white stars?