G'day all,
Would some knowledgable person be able to explain to me ,this question?
The images that we are looking at through our scopes are actually a slice in time. That means;what we are seeing has been travelling at the speed of light from where it originated from in the universe.
If the object is (say) a 1500 light years away from planet earth .We would be seeing what it looked like 1500 years ago.
(NOW FOR MY QUESTION)
" HOW DO WE KNOW THAT IS STILL THERE"?