21–40 of 855 results
radar map of Titan's north pole

Solar System

Winds and Tides Drive Sea Waves on Titan

Sunlight glittering off rough patches of sea on Saturn’s largest moon indicates ever-changing waves.

Protoplanetary disk

Cosmology

Hints of Young Solar Systems

By studying the images of small young star systems, astronomers expect to learn more about the formation of our solar system.

Ceres, ocean world

Solar System

Asteroid Ceres: An Ocean World

Scientists have thought that the largest main-belt asteroid, Ceres, had an ancient ocean beneath its surface. But new data from the Dawn spacecraft show the underground ocean might still be there.

Earth vs Hayabusa 2

Spacecraft and Space Missions

Potential New Targets for Japan's Hayabusa 2 Mission

The Hayabusa 2 team has laid out a proposal for an extended mission to one of two asteroids after the spacecraft's sample return this December.

Young solar system

Solar System

Radioactive Aluminum Sheds Light on Solar System History

Astronomers thought giant stars were reponsible for flooding the early system with a radioative isotope — but the Sun itself might have made it.

Superimposed: Mars river valley networks and Devon Island channels

Solar System

Was Early Mars "Wet and Warm"? Or Wet and Cold?

A new model suggests that Martian valley networks might have been created by ancient subglacial rivers rather than water flowing on the surface.

Perseverance launch

Astronomy in Space with David Dickinson

NASA Launches Perseverance Rover for Mars

NASA’s Perseverance rover heads to the Red Planet.

Looking back at Pluto

Celestial Objects to Observe

Cool Off with Pluto This Summer

Pluto might be a challenging target but it's well worth the effort. Grab your telescope and see if you can spot this distant, chilly world.

Rover tracks on Mars

Spacecraft and Space Missions

Three Missions Head for Mars

The summer of 2020 will see three spacecraft launch toward the Red Planet, each one with distinct objectives.

Magma ocean and crust

Solar System

Long-lived Lunar Magma Ocean Points to a Younger Moon

Most lunar scientists today think that the Moon formed after a Mars-size body hit the still-forming Earth, launching enough material into orbit to form our satellite. But there is still lively debate about the age of the Moon, and its evolution after it formed. A Mars-size body smashed into Earth…

The Sun's full disk

Solar System

European Solar Orbiter Takes Closest-ever Images of the Sun

The first images to be released from the European Space Agency’s Sun-imaging spacecraft show intriguing “campfires” that could help explain a solar mystery.

Sharing Comet NEOWISE

Comets

Comet NEOWISE Dazzles at Dusk

Comet NEOWISE has captivated skywatchers with its stunning tail. Now that it's moved into the evening sky and climbing higher each night even more people will get a chance to see it.

Clyde's Spot

Pro-Am Collaboration

Amateur Astronomer Discovers "Clyde's Spot" on Jupiter

The discovery of a new feature on Jupiter gave NASA’s Juno mission an opportunity to image an emerging storm up close.

Venus's June 3rd transit across solar corona

Astronomy and Society

Venus Passes in Front of the Solar Corona (VIDEO)

Two astronomers captured the silhouette of Venus as it passed in front of the solar corona.

Solar flare

Solar System

New Evidence for Nanoflares?

Astronomers have spotted weak bursts of low-frequency radio emission coming from all over the Sun.

Asteroid illustration

Solar System

Exploring Links Between Nearby Asteroids

In preparation for the launch of Destiny+, a new study reveals that two near-Earth asteroids may share the same parent.

Chaotic, Jupiter-like orbit

Solar System

Jupiter Has Trapped a Comet in a Bizarre Orbit

Jupiter has captured an icy comet from the outer solar system. The comet's bizarre orbit will bring it back for another super-close pass in 2063.

composite image of Ryugu's rubbly surface

Spacecraft and Space Missions

Ryugu May Have Skirted Close to the Sun

Observations by the Japanese Hayabusa 2 spacecraft show subtle color differences, indicating something has reddened the asteroid’s surface.

Mars: dry vs. wet

Solar System

Weak Martian Magnetic Field May Have Let Air Out

Mars's magnetic field weakened and disappeared billions of years ago. Now, scientists have found that the weak field might have been worse than none at all.

The Sun vs. Sun-like Stars

Stellar Science

How Lazy Is the Sun?

Astronomers studying hundreds of Sun-like stars were surprised to find that most of them are more active than the Sun. Why is the Sun different?

Advertisement
Advertisement
Advertisement
Advertisement