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orbits & rotations

A long cylinder of ice on a table
Posted inNews

Ice Cores Record Long-Ago Seasons in Antarctica

by Caroline Hasler 17 March 202320 March 2023

Researchers used ice core data to reconstruct seasonal temperatures throughout the Holocene. The results link especially hot summers with patterns in Earth’s orbit.

A cratered planet and its smaller moon appear silhouetted against a dark background.
Posted inNews

Marauding Moons Spell Disaster for Some Planets

by Katherine Kornei 6 March 20236 March 2023

In solar systems beyond our own, some moons might eventually collide with their host planets, new simulations suggest.

An artist’s illustration of a brownish orb in front of a background of white stars. A ring made up of small gray pieces of debris surrounds the orb. To the left of the planet is a smaller brownish orb. To the right is a bright star.
Posted inNews

Quaoar’s Ring Defies Gravity

by Kimberly M. S. Cartier 3 March 202315 March 2023

The dwarf planet’s ring makes astronomers question whether a long-held theory about ring and moon formation needs tweaking.

An artist’s rendering of three hazy rings surrounding the Sun near the orbits of Mercury, Venus, and Earth
Posted inNews

Mercury Isn’t Alone in Orbit, and Scientists Don’t Know Why

by Jure Japelj 27 February 202327 February 2023

A cloud of dust traces the innermost planet’s orbital path. By all accounts, it shouldn’t be there.

Artist’s illustration of a large yellow sphere with red curved lines running through it. A red striped sphere is in the foreground.
Posted inNews

“Hot Jupiter” Is in a Possible Death Spiral

by Damond Benningfield 31 January 202331 January 2023

Kepler’s first exoplanet is migrating toward its star, an evolved subgiant that is much bigger than first thought.

Two spacecraft are visible between two large, gray asteroids, with stars in the background.
Posted inNews

NASA’s Double Asteroid Redirection Test Is a Smashing Success

by Katherine Kornei 12 January 202312 January 2023

The mission, focused on the Didymos-Dimorphos binary asteroid system, proved that an asteroid’s orbit can be altered by kinetic impactor technology.

Aerial view of Earth with part of a satellite visible
Posted inNews

Earth’s Orbit Is About to Get More Crowded

by Sarah Scoles 10 January 202310 January 2023

The military is launching a fleet of small, interconnected satellites to collect data, track missiles, and aim weapons.

The orange moon Titan passes in front of the striped disk of the planet Saturn, with Saturn’s rings seen edge on, forming a thin line between the moon and planet.
Posted inNews

Long-Gone Moon Could Explain Birth of Saturn’s Rings

by Damond Benningfield 20 October 202220 October 2022

Named Chrysalis, the moon could have disintegrated during a close encounter with the gas giant roughly 100 million years ago.

An optical astronomy image shows hundreds of stars in shades of blue, white, yellow, and red, with a dark band of dust running horizontally across the image. The stars are a range of sizes, from bright blue spots to no more than pinpricks.
Posted inNews

Massive Stars May Commit Grand Theft Planet

by Kimberly M. S. Cartier 23 September 202223 September 2022

New simulations show that planets around young, massive stars may have been captured or stolen rather than homegrown.

Diagram showing the interior of the Sun
Posted inFeatures

Shake, Rattle, and Probe

by Damond Benningfield 25 August 202217 January 2023

Helioseismology allows scientists to study the interior of the Sun, solve some basic physics mysteries, and forecast space weather.

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EDITORS' VOX
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By Luke C. Skinner and Edouard Bard

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