A recent study published in The Astrophysical Journal Letters has provided the most precise distance to the Coma Cluster of galaxies yet — and also has deepened a crisis in cosmology. The problem is ...

The object that would become known as both the Great January Comet of 1910 and the Daylight Comet was first seen Jan. 12 in the Southern Hemisphere. It’s unclear who precisely discovered it, but some ...

Deep-sky objects shine and the giant planets show off their satellites as the bright light from the Moon disappears from our ...

The Fighting Dragons of Ara, also called the Rim Nebula and cataloged as NGC 6188, comprises dark, star-forming clouds and bright young suns.

East of Gemini, where the bright planet Jupiter has been demanding attention, is the constellation Cancer. Closer to the horizon and to the lower left of the Twins early in the evening as the ...

First-magnitude Saturn crosses into Pisces today, readily visible to the naked eye as the brightest light in the southwestern sky as it sinks slowly toward the horizon a few hours after sunset. You’ll ...

When the Huygens probe dropped into Titan’s atmosphere on Jan. 14, 2005, no one knew what to expect. For landings on Mars or the Moon, mission scientists plotted out landing sites with meticulous care ...

Ever since the first human spaceflight on April 12, 1961, humanity has continued to push outward to better understand our solar system and ourselves.

NASA for the first time has announced launch windows for the first crewed spaceflight beyond Earth orbit in more than half a century. The space agency on Friday said it is making final preparations ...

Charged with determining if the ionosphere could be penetrated by radar, Lt. Col. John DeWitt of the Army Signal Corps assembled a team of scientists, mathematicians, and engineers at Camp Evans (Fort ...

While late M-stars are the easiest places to find Earth-sized planets, a new study suggests they are biological dead ends where animal life may never find enough fuel to evolve.

The solar system’s largest planet shines bright as the Moon wanes and Saturn’s moons dance in the sky this week.