A NASA spaceship is zooming toward the farthest, and quite possibly the oldest, cosmic body ever photographed by humankind, a tiny, distant world called Ultima Thule some four billion miles (6.4 billion kilometers) away.
The spacecraft team that brought us close-ups of Pluto will ring in the new year by exploring an even more distant and mysterious world.
A NASA spacecraft is hurtling toward a historic New Year's Day flyby of the most distant planetary object ever studied, a frozen relic of the early solar system called Ultima Thule.
As the brilliant comet 46P/Wirtanen streaked across the sky, NASA telescopes caught it on camera from multiple angles.
A special visitor is crossing the sky: Comet 46P/Wirtanen, sighted with telescopes and binoculars in recent weeks, is on the way to its closest approach to Earth this weekend, when it might become visible to the naked eye.
Parker Solar Probe is alive and well after skimming by the sun at just 15 million miles from our star's surface. This is far closer than any spacecraft has ever gone—the previous record was set by Helios B in 1976 and broken ...
Earth's neighboring planet, Mars, is closer than it has been in the past 15 years, offering unusually bright views of the Red Planet's auburn hues.
Skywatchers around much of the world have begun watching a complete lunar eclipse that is the longest of this century.
NASA's Transiting Exoplanet Survey Satellite has started its search for planets around nearby stars, officially beginning science operations on July 25, 2018. TESS is expected to transmit its first series of science data ...
In summer 2018 the planets Mars and Saturn are, one after the other, in opposition to Earth. During this event the planets are relatively close to Earth, allowing astronomers to observe them in greater detail. Hubble took ...