New observations from the Event Horizon Telescope reveal the chaotic region around the Milky Way’s central black hole, Sagittarius A*, in extreme detail.
A new cache of confirmed exoplanet discoveries marks a milestone in planets found beyond our solar system.
A handful of rules can describe the route some object repeatedly takes around another in space. Calculating that path, however, can be quite complex.
Constellations are clusters of related things, especially the stars that form patterns in the night sky — some of which date back to ancient times.
Once known as a pipsqueak planet, Pluto is now the solar system’s best known dwarf planet.
The Doppler effect is a perceived change in the frequency of light or sound waves due to the wave source moving relative to an observer.
Dark energy is the unknown force causing the universe to expand faster and faster.
The force of gravity holds us on the ground, keeps planets in orbit and extends throughout space. A very weak gravitational pull is called microgravity.
Different kinds of telescopes on Earth and in space help us to see all wavelengths of light. Some can even peer billions of years back in time.