Compare the size of the sun to earth and to other stars in the sky?

Answer 1

Size, mass and age. are the differences.

Our Sun is also a star, where hydrogen atoms fuse into helium atoms. It is a giant nuclear reactor.

Have a look at the Herzsprung-Russell Diagram . It will give a star's given size, mass and age. and to colour it appears in the sky.

Our Sun is a Yellow Star approximately half way through its life. When all the hydrogen is used up it will form a Red Giant and swallow up the inner planets the Earth included.

Answer 2

-- The sun's diameter is about 109 times as large as the earth's diameter.

-- The sun is completely average and undistinguished among stars, with a purely

average size for stars. Other stars range from much smaller than the sun to much

bigger.

Answer 3

There are stars that are much brighter than our Sun, and others that are much dimmer. In any case, our Sun is in the top 10 percentile - meaning that the large majority of stars are dimmer than our Sun.

Answer 4

A typical galaxy has a size diameter of 100,000 light years, and contains several hundred billion stars.

A constellation is also a group of stars, but it is only apparent, from our point of view. The stars may be unrelated among themselves. (And, the most notable stars in the constellation will invariably be within our own galaxy.) A constellation is thus a direction in the sky, sort of.

A solar system is a star (= sun) with its planets.

Answer 5

We believe that our Sun is a little bigger than the "average" star, but we cannot be entirely sure.

This is because scientists have only recently begun to realize how many very small, very dim stars there are in the galaxy. For example, the nearest star to our Sun is a small red dwarf called Proxima Centauri. It is so small and dim that it cannot be seen with the naked eye!

So, just how many red dwarf stars and even dimmer brown dwarf stars are there? We cannot know. If there are a lot, then that would push the average down, which would make our Sun bigger and brighter by comparison.

Answer 6

Our Sun is somewhat larger than average, but not greatly so. The problem is that the small stars are also DIM stars, so they are difficult to see. The closest star to the Sun is a red dwarf star called Proxima Centauri; it isn't visible to the naked eye.

So we don't really know how many small, dim stars there might be. The very large stars are also very BRIGHT, and easy to see.

The very largest stars are about 150 times more massive than our Sun, and may be a thousand times larger in diameter. The smallest stars are about 5% of the Sun's mass; any smaller, and they wouldn't have enough mass to maintain the nuclear fusion that makes them stars.

Answer 7

A galaxy is a group of stars and a star can be either a planet or a clump of dust. Our sun is a star but it shines much brighter then any other star because it's closer to Earth.Definition- Star: A star is a massive, luminous ball of plasma held together by gravity. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth. Other stars are visible in the night sky

Answer 8

• A galaxy is a large collection of stars that revolve around a central point - usually a super massive black hole. (The Milky Way Galaxy)
• A star system is a collection of other matter - Planets, moon, dust debris etc, that revolve around a central star(s). (The Solar System)

Answer 9

A constellation (in casual usage) is an imaginary pattern composed of a group of several stars.

Strictly speaking, astronomers would call such a pattern an "asterism", and use the term "constellation" to mean "a specifically designated patch of sky". This patch of sky will, of course, contain many stars.

Answer 10

A constellation is an apparent cluster of stars (that is, they look close together to us easily-deceived sods on earth), while a galaxy is a real cluster of stars, i.e., a bunch of stars that actually are (in astronomical terms) close together.