How can we see objects that are so far away?
2842
Photons from stars--how do they fill in such large angular distances?
26074
Seeing strange things in light
42899
How do astronomers measure the distance to a star or other celestial object?
127543
Determining the path of a light ray
62039
What does a sphere moving close to the speed of light look like?
127351
Why can we only "see" reflected light?
77262
How is it that distortions in space can be measured as distances?
113234
Why does a glass window reflect white objects white from an atomic scatterers’ viewpoint?
37941
Can light travel slower than the maximum?
18886
How to get distance when acceleration is not constant?
10147
Why can't we see infrared light?
121563
How to mask animated objects so they aren't visible past a certain area?
7469
Why are there non-visible objects in my final render?
154914
What will I see if I travelled to a distant planet in 100 times faster than speed of light and look back?
20960
Seeing the shadow of a black hole
137118
Calculate distance with one camera
41134
Nearby objects won't move independently?