Outside our (Milky Way) galaxy.
Yes, stars can exist outside of a galaxy. These stars are typically referred to as intergalactic stars, and they may have been ejected from their original galaxy due to interactions with other stars or galactic dynamics. Intergalactic stars are typically found in the space between galaxies.
The stars you see at night still exist.
Yes, stars really exist. One example of a star is the sun in our solar system.
Stars a yellow-ish orange for the majority of their lifetimes.
The majority of stars in our galaxy are red dwarfs, which are smaller and cooler than our sun. They make up about 70-80% of the stars in the Milky Way.
The majority of visible stars in the sky are main sequence stars, like our own Sun. These stars are in the stable phase of their life cycle where they are fusing hydrogen into helium in their cores.
At the centre of stars.
All around us.
If our sun did not exist the other stars would be little different from the way they are. The sun is just one of billions of stars in the galaxy. Many of the stars we see in the sky are larger than our own sun.
Correct. M-type stars on the main sequence are called red dwarfs.
Nubula does not exist.
The great majority of stars are plotted along a diagonal band called the main sequence on an H-R diagram. This band represents stars that are fusing hydrogen into helium in their cores, where the varying luminosities and temperatures of stars are displayed.