How Do Telescopes See the Past?
Why looking deep into space means looking back in time due to the speed of light.
Why looking deep into space means looking back in time due to the speed of light.
The physics behind a singularity and the collapse of massive stars.
The absolute boundary around a black hole beyond which nothing, not even light, can escape.
Regions of spacetime where gravity is so strong that even light cannot escape.
Measuring the vast distances in space using the speed of light.
A highly magnetized rotating neutron star that emits beams of electromagnetic radiation.
The brilliant, explosive death of a massive star.
When one celestial body such as a moon or planet moves into the shadow of another celestial body.
Planets that orbit a star completely outside of our own solar system.
The mysterious force hypothesized to be responsible for the accelerating expansion of the universe.
The invisible substance that makes up most of the universe's mass.