No two planets within our solar system have the same exact size. However, Earth and Venus are quite close - their diameters differ by only 652km.
No, not at all. The nearest known star is at a distance of about 4.3 light-years; some of the stars that we can see with the naked eye are hundreds of light-years away, and stars that we CAN'T see with the naked eye can be millions or billions of light-years away.
because all the stars in a cluster are about the same age and distance from the Earth
Any constellation is a group of stars that appear to form some kind of pattern, but have no connection with each other. They all happen to be in roughly the same direction from us, but they're all at different distances. So there's no such thing as a constellation's distance from us.
Constellations don't have a particular distance from Earth. This is because the stars only APPEAR to be a group in the sky. In fact they are all at different distances usually.
If I understand the question correctly, the answer is YES. There are billions of stars. The earth happens to rotate round the one that we call the sun. All other stars are all a lot further away.
Any constellation is a group of stars that appear to form some kind of pattern, but have no connection with each other. They all happen to be in roughly the same direction from us, but they're all at different distances. So there's no such thing as a constellation's distance from us.
Absolute magnitude
because all the stars in a cluster are about the same age and distance from the Earth
Well, they clearly aren't for closer stars, astronomers measure the angle the star's light hits the Earth at 6 month intervals - as the Earth rotates around the sun at a known distance, it's simple geometry given the two angles and the diameter of the Earth's orbit to calculate the distance of the star in question and the distance varies.
Hercules and all the other constellations are made up of dozens of stars, all of which are different distances from Earth. They only appear in the same plane from our "galactic neighborhood".
There is no distance from earth, as all the stars are at different distances!:))
All constellations are imaginary diagrams formed by patterns of many stars - each one it's own unique distance from Earth. So a constellation isn't a particular distance from Earth - as the stars only look like they're next to each other from our perspective here on Earth.
All constellations are imaginary diagrams formed by patterns of many stars - each one it's own unique distance from Earth. So a constellation isn't a particular distance from Earth - as the stars only look like they're next to each other from our perspective here on Earth.
The sun is the anchorpoint of the earth. We need to have a point of reference in order to measure distance. The sun is this point of reference as it in relation to earth does not move. We know the distance from the sun to the earth so that gives us another referance. All we now need is the angle from earth toward a star and we can sort of calculate distance to the star :-) There is a little bit more to it but the basic idea is there :-) When it comes to actually studying stars. We know that other stars with same type of light as our sun will be approximately same size. Yet again it is used as a point of reference. Regards.
No, because one part is at day-time, they cannot see any stars. If they could, they would see different stars, for they are on the opposite side of Earth.
All the stars you see are part of the Milky Way, and so are we. So you could say they are the same distance. There is a particular patch through the sky which we particularly refer to as the Milky Way, and there are many stars that are nearer to us than that.
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Like all constellations, they are made up of stars - each one it's own unique distance from Earth. Therefor a constellation isn't a specific distance from Earth.