As the countdown to the year's first total lunar eclipse begins, here's what to know about the difference between a lunar ...

At 2:26 a.m. on Friday, the moon enters into the total eclipse − known as totality. At this point, the only light from the ...

PhotoPhoto of the Sun in hydrogen-alpha light. The giant planet Jupiter, whose large moons Galileo discovered with his "trouble-making" telescope, is more than 5 times farther from the Sun than ...

Light from the Sun reaches Earth through the vacuum of space. The speed of light in air is very close to 300 000 000 m/s. which is nearly a million times faster than the speed of sound ...

Coincidentally, also visible in the new images is the planet Mercury, appearing as a tiny speck of light gliding closer to the sun. Launched into Earth's orbit last June, GOES-19 is the newest ...

While Earthlings were watching the moon turn blood red during Friday morning’s lunar eclipse, a robotic lander on the moon ...

If you get up with the roosters, you may have recently seen a rare sight in the sky for the Central Virginia area: a sun pillar.

Blue light is found in nearly every light source, including the sun, and excessive exposure can harm your vision or prevent you from falling asleep. But will filtering out blue light help with the ...