1–20 of 868 results
Comet 67P/Churyumov-Gerasimenko

Solar System

Comet Watch 2021

If you own an 8-inch or larger telescope you might see more than a dozen new and returning comets this year, including one potential naked-eye candidate.

Lost Jovian moon J 23

Solar System

Amateur Astronomer Finds “Lost” Moons of Jupiter

An amateur astronomer has recovered four of five "lost" Jovian moons.

Sunspot, in detail

Solar System

Will the Next Solar Cycle Surprise Us?

The coming months will test a new prediction that — contrary to most expectations — forecasts one of the strongest sunspot cycles on record.

Celestial Objects to Observe

Jupiter and Saturn Embrace in Solstice Conjunction

Jupiter and Saturn fashion the Great Conjunction of 2020 when they pair up on December 21st, the winter solstice. That evening they'll be closest in nearly 400 years.

Artist's impression of the outer reaches of our solar system.

Stellar Science

The Eventual Fate of Our Solar System

Have you ever wondered about the future of our solar system? Astronomers have predicted the effect of the Sun's expansion on its planets.

Surveyor 2

Solar System

Earth's New "Minimoon" May be a 1960s-Era Rocket Booster

An object set to pass near Earth next month may in fact be a relic of the early Space Age.

2001 Leonid storm

Solar System

Leonid Meteor Shower to the Rescue

Modest but reliable, the annual Leonid meteor shower returns this week. Take an hour or two to relax and enjoy the show.

Solar System

NASA's Osiris-REX Has Stowed Its Bite Out of Asteroid Bennu

NASA’s Osiris-REX successfully stowed its sample of Bennu's regolith, collected earlier this week. Images show a good haul.

Jovian sprite

Solar System

Juno Discovers Sprites and Elves on Jupiter

NASA's Juno spacecraft has captured ultraviolet images of a rare atmospheric phenomenon in Jupiter's atmosphere.

Psyche

Solar System

Psyche: A Metal-Rock World with Iron Lava?

New observations suggest the main-belt asteroid Psyche is an intriguing world, possibly one with volcanic flows of iron on its surface.

Near-Earth asteroid passing Earth

Solar System

(Very) Small Chance of Apophis Asteroid Impact in 2068

The subtle effect of sunlight may turn the near-Earth asteroid Apophis toward Earth in 2068 . . . but chances for impact remain small.

Water on the Moon

Solar System

Water on the Moon Isn't Just at the Poles

Water exists even on the sunlit Moon, a new study shows — trapped in glass beads but still extractable for lunar exploration.

TAG Osiris-REX

Solar System

Osiris-REX "TAGs" Bennu, Returns Stunning Views

See images and video from NASA’s Osiris-REX spacecraft as it samples the Nightingale site.

Magma ocean and crust

Solar System

Moon’s Magnetism Might Have Protected Earth

The Moon's magnetic field, now long gone, might once have shielded Earth from the young Sun's radiation.

ATLAS with a tail

Comets

Comets Crawl through the Skies at Dawn and Dusk

Comets have been scarce since NEOWISE departed the scene. Not anymore. Suddenly, there are four fresh faces visible from dusk til dawn.

OSIRIS-Rex

Astronomy in Space with David Dickinson

Osiris-REX Successfully Collected Sample from Asteroid Bennu

NASA's Osiris-REX mission has successfully touched down on the asteroid Bennu to collect a sample of its surface for return to Earth.

Global false-color map of Bennu

Solar System

Osiris-REX Finds Some of Solar System's Oldest Rocks on Bennu

NASA's Osiris-REX mission has found evidence of ancient water flows on the surface of asteroid Bennu.

Pioneer Venus

Solar System

Did Pioneer Venus Find Phosphine First?

NASA's Pioneer Venus mission, which launched in 1978, found the first tantalizing clues of phosphine, a potential biosignature gas — but it took 40 years to realize it!

Venus

Pro-Am Collaboration

Calling on Amateur Astronomers: Observe Venus!

The Mercury-bound BepiColombo spacecraft will fly by Venus on October 15th, and the mission is asking amateurs for their help.

Mars south pole ice cap

Solar System

Evidence Grows for Super-Salty Underground Lakes on Mars

New analysis of data from the European Space Agency's Mars Express orbiter strengthens the case for salty lakes underneath Mars's south polar cap.

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