Recent content by bilal99uzzzz

thanks Drakkith your answer was satisfying . as this universe has been around for 13.82 billion years so we must have the farthest stars and galaxies even farther than 13 billion light years because the universe is expanding now what is farthest place or star or galaxy known to us and how...

For a precise answer i think we should first define energy . not just the ability to do work , but what really energy is .

Nothing can exceed the speed of light so how can scientists can tell us about 1000s of light years away of our location in the universe ? I mean what instruments have they used for it ? Waves? ( what kind of waves ? ).