Stars

How many stars are in our solar system 2020

How many planets make up our solar system as of 2020? There are eight planets in the solar system Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus...

Stars

What device is used to know what a star is made of and how old it is?

How can you tell how old a star is? Essentially, astronomers determine the age of stars by observing their spectrum, luminosity and motion through spa...