21–40 of 994 results
Bright Lyrid

Explore the Night with Bob King

Celebrate Spring with the Lyrids

People have been watching the annual Lyrid meteor shower for more than 2,700 years. Come join the crowd!

Decadal Survey

Solar System

What's in Store for the Next Decade of Planetary Science

Big winners in the planetary science decadal survey include a Uranus flagship mission, a orbiter and lander for Enceladus, and an emphasis on planetary defense.

Europa's cracked-ice surface

Solar System

Icy Moon Europa May Host Water Near the Surface

Radar measurements of ice on Earth suggest that Jupiter's moon Europa might host water near its surface.

Neptune

Solar System

Summer on Neptune is Surprisingly Chilly

Even though Neptune is entering its version of summer, it's actually cooling down — except for its poles, which are mysteriously warming up.

Geminid fireball

Solar System

U.S. Space Force Releases Data on Bright Fireballs

The U.S. Department of Defense has released data on some 1,000 bright fireballs. Scientists are still debating if the data confirm an interstellar meteor.

Microphone placement on Perseverance

Solar System

Listen to the Martian Soundscape

Two microphones on Mars, carried on NASA's Perseverance rover, are for the first time revealing the sounds of another planet.

Uranus and Neptune

Solar System

Where Did the Ice Giants Form?

Conventional planet formation scenarios have Neptune and Uranus forming closer to the Sun. But a new study shows that the ice giant planets could have formed right where they are now.

Venus (radar image vs artist's concept of oceans)

Solar System

The History of Venus in Air, Rock, and Water

Forty years ago, NASA's Magellan mission “closed the book” on Venus. Now, a new generation of astronomers think the planet next door deserves a second chance.

Saturn 2011 Cassini

Explore the Night with Bob King

Will Saturn Sprout Spots this Observing Season?

As Saturn returns to the morning sky, will this otherwise serene-looking planet experience another bout of severe weather? Keep your eyes peeled for white spots!

Apollo 17 sample

Solar System

How Apollo 17 Is Preparing Artemis for a Return to the Moon

Researchers gear up for Artemis and a new generation of lunar exploration, with a look at samples from the final crewed mission to the Moon.

Asteroids in space

Solar System

How Many Moons Can an Asteroid Have?

The discovery of the first quadruple asteroid system raises the question: Is there a limit to how many moons an asteroid can have?

Mars Hope

Astronomy in Space with David Dickinson

Update from the Hope Probe at Mars

The United Arab Emirates' Hope Probe, on a wide orbit around Mars, provides views of the dynamic Red Planet.

Full moon and Earth shadow

Explore the Night with Bob King

Uncovering Secrets of Earth's Shadow

The daily rising and setting of Earth's shadow is a beautiful sight anyone on the planet can view. It's also an opportunity to witness the rapid changes that accompany sunset or sunrise, but at the opposite end of the sky.

WISPR view vs. Magellan radar

Solar System

The Parker Solar Probe Captures Surprising Images of Venus Nightside

A visible glow from our sister planet’s nightside sheds new light on a 300-year-old observing enigma dubbed the “ashen light.”

solar flare

Solar System

Solar Tsunami Hit Earth 9,200 Years Ago

Scientists examining ancient ice cores have found radioactive evidence of an extreme solar storm that took place in 7,176 BCE.

Solar nebula

Solar System

Meteorite Evidence Suggests Earth’s Water Was Here Before Earth Was

Where did Earth’s water come from? One of the oldest meteorites on Earth is adding new pieces to an old puzzle.

Asteroid trail in Crab Nebula image by Hubble

Solar System

Citizen Scientists Find 1,000+ Asteroids Photobombing Hubble Images

The combined power of citizen science and machine learning have led to the discovery of more than 1,000 new asteroids in archival images taken by the Hubble Space Telescope.

View of Gale Crater from top of pediment

Solar System

Evidence Hints at Ancient Life on Mars

Scientists have found a chemical signature that hints at ancient life on Mars. But other possible explanations remain.

Mare Orientale gravity map

Celestial News & Events

Set Your Sights on This Lunar Bull’s-Eye

Go ahead, live on the edge: Grab your chance this month to see Mare Orientale, one of the most spectacular lunar seas most people have never seen.

Asteroid makes close approach

Celestial News & Events

Watch an Asteroid Race Across the Sky

The kilometer-wide, potentially hazardous asteroid 1994 PC1 will fly past Earth on January 18th. Good news on two counts: It won't hit us, and it's bright enough to see in a 4-inch telescope.

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