The Moon reaches apogee, the farthest point from Earth in its orbit, at 5:46 A.M. EDT. At that time, our satellite will stand 251,996 miles (405,548 km) away. With the Moon sinking low in the hours ...

Astronomers use many methods to determine this number, including gravitational lensing, the universe’s expansion rate, and more.

The universe's expansion means its size is bigger than its age suggests. The universe's expansion doesn't have a speed limit like objects within it. Distant galaxies move away from us as space itself ...

JWST observations of Saturn's atmosphere revealed unprecedented details of its aurora and upper atmosphere, including previously unseen, complex structures. In the ionosphere (1100 km altitude), dark, ...

As of March 2025, Saturn possesses 274 confirmed moons, the highest number among planets in the solar system. Early discoveries, beginning with Titan in 1655, were limited to five moons by the late ...

On September 20th, beginning around 12:30 A.M. EDT, Titan, a moon of Saturn, will transit across the planet's disk, accompanied by its shadow. The transit will be visible telescopically, with Titan's ...

Data from NASA's Dawn mission, analyzed via thermal and chemical models, suggests Ceres possessed a long-lasting internal heat source driven by radioactive element decay. This heat source, reaching ...

Neptune reached opposition at 9:00 A.M. EDT, rendering it visible throughout the night. Neptune, at magnitude 7.7, is not visible to the unaided eye but can be located 2.7° northeast of Saturn using ...

NGC 457, also known as the Owl Cluster, is readily observable with binoculars or telescopes in the evening sky. Located approximately 2.1° southwest of Delta Cassiopeiae, it is easily identified near ...

The autumnal equinox occurs at 2:19 P.M. EDT, marking the beginning of astronomical autumn in the Northern Hemisphere and spring in the Southern Hemisphere, with equal sunlight distribution across ...

On a specified date, the Moon will pass 0.8° north of Venus and 1.3° north of Regulus (magnitude 1.4), with Venus and Regulus separated by less than 0.5°. This celestial trio will rise around 4:30 A.M ...

The OSIRIS-REx spacecraft returned triumphantly to Earth in 2023 after collecting 4.3 ounces (121.6 grams) of precious grains of dust and rock from the asteroid Bennu in 2020. While that sample return ...