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