41–60 of 914 results
Perseverance during descent

Solar System

NASA’s Perseverance Arrives on Mars

NASA’s Perseverance rover, now safely on the floor of Jezero crater, will soon begin its search for evidence of past life on Mars.

Exomars Trace Gas Orbiter

Solar System

Chlorine and Water Are in the Air in Martian Summertime

Two studies of the Martian atmosphere are changing the way we think about its current climate and its ancient past.

Solar eruption

Solar System

Tree Rings Help Reconstruct a Millennium of the Sun's Activity

Astronomers are using tree rings as a historical record of solar activity — and they've found that the Sun was much more active in the past.

2020 XL5 orbit

Solar System

Second Earth Trojan Asteroid Discovered

A recently discovered asteroid appears to be an Earth Trojan, orbiting a gravitationally stable area with only one other known occupant.

Daytime planet fest

Celestial Objects to Observe

Planets and Comets Can't Hide from SOHO's Eye

With the help of the Solar Heliospheric Observatory you can not only keep track of the planets in the daytime sky but maybe even discover a comet.

Artist’s impression of the Ulysses spacecraft

Stellar Science

Measuring Solar Eruptions with a Rare Alignment

New analysis of a coronal mass ejection detected by the alignment of two spacecraft reveals that it experienced erosion and restructuring as it traveled.

Comet 67P/Churyumov-Gerasimenko

Celestial Objects to Observe

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.

History and Sky Lore

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

Astronomy in Space with David Dickinson

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

Celestial Objects to Observe

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.

Astronomy in Space with David Dickinson

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.

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