All galaxies are held together by gravity, but based on what we can see (stars, nebulae, etc.) , there shouldn’t be enough gravi
ty to do the job. That is why scientists believe that all galaxies are partially held together by a substance called _________________________________, which we can’t see.
<h2>The sun is to bright to see the stars in the morning, at night you can see the stars a little because they are the stars that are closest sum stars are far away </h2>
