Every bright star is a sun, like our own sun. This means that stars are huge globes of glowing gas. They are so hot that if a piece of steel were placed there, it would disappear in a puff of gas! In many of the stars, the gases are very thin. This is because the particles. or atoms, of matter in the gas, are so far apart.
But the stars do have matter in them. We know, for example, that the sun contains more than 60 of the chemical elements present in the earth. Among the elements in the sun are hydrogen, helium, iron, calcium, and magnesium.
In cooler stars, the matter may be morn nearly liquid, somewhat like the boiling iron in a blast funiace. In some very old and cold stars, the matter may be so densely packed that a cubic inch of it would weigh a ton. Such stars are called “dead” or “dark” stars.
Astronomers can find out all this by using instruments called “spec- noscopcs”. The spectroscopy studtes the light a star gives, and from this we can lain what kinds of matter it contains and how hot it is.
The different colors of the stars, white, blue, yellow, or red, indicate what chemical elements are present in them. Different temperatures of stars also cause differences in the light they give, in their “spectrum”. In this way, the temperature of a star can be determined.
Is A Star Solid Or Gas?
It is, as all-stars are, a hot ball of gas made up mostly of Hydrogen.
A star is a massive ball of gas that is held together by its own gravity. But is it solid or gas? For a long time, scientists believed that a star is solid. This is because of the fact that the gravitational force of the star acts as if it were a solid object. However, when the Sun was observed, scientists were surprised to find that the Sun does not have a solid surface, but rather a gas-like surface.
On the question of what color is the hottest star, the answer is… purple. (Well, that’s not what the book says, but it’s as close as you can get.) For some reason, in science class, we are always taught that the hottest star in the universe is the same color as the sun.
What star is the coldest?
There is a widely held belief that the coldest star in the Universe is VY Canis Majoris. This binary star system is located 4,000 light-years away from Earth so that if you could travel to the system you would have to travel 4,000 light-years to get there. However, this is not correct, the coldest star in the Universe is the red hypergiant, VY CMa, which is located in the constellation of Monoceros. This star is 4,000 light-years away from Earth. To put this in perspective VY CMa is 100 times more massive than the Sun, so if you were to sit on the surface of this star (which would melt you into a puddle of go