Before Apollo astronauts set foot upon the Moon, much remained unknown about the lunar surface. While most scientists ...

In the Milky Way's central bulge, about 24,000 light-years from Earth, a peculiar pair of objects appears to be hurtling ...

New atomic clocks are more accurate than those used to define the second, suggesting the definition might need to change ...

Launched into Earth's orbit last June, GOES-19 is the newest addition to NOAA's fleet, equipped with a sensor called the ...

On Monday (Feb. 17), the moon reaches what's known as apogee — its farthest point away from Earth. The moon's orbit is elliptical, or oval-shaped, meaning its distance from Earth changes ...

The phenomenon of a Full Moon arises when our planet, Earth, is precisely sandwiched between the Sun and the Moon. This alignment ensures the entire side of the Moon that faces us gleams under ...

An eclipse like this happens when the Moon, Earth and Sun all align so that the Moon is passing into the Earth’s shadow. NASA explains it this way: “In a total lunar eclipse, the entire Moon ...

Two bands of radiation called the Van Allen belts encircle Earth. After a May 2024 solar superstorm, two more showed up between those belts.

Looking up at the moon in the night sky, it’s difficult to grasp just how dramatic the topography of its surface really is.