Stellar companion strips outer layers from massive star (art)

Stellar Science

Close Companions Help Stars Make More Carbon

Massive stars can produce twice as much carbon when they have a close binary companion, according to a new study. The result is a small but important step in understanding the cosmic origin of elements.

Solar System

Misfit Meteorite Sheds Light on Solar System History

Scientists have discovered the first meteorite that doesn't fall into one of two fundamental groups. The meteorite provides a unique glimpse into the era of asteroid formation and migration.

Near-Earth asteroid

Solar System

How Often Do Chicxulub-level Asteroids Hit Earth?

Asteroids of different sizes crashing on Earth originated from different parts of the main asteroid belt, researchers say; the finding has implications for how often such collisions happen.

Neutron star mergers produce r-process elements

Stellar Science

Metal-poor Stars Shed Light on the Origin of Gold

Explosions of massive stars might have produced gold and other rare heavy elements observed in metal-poor stars in our galaxy’s halo.

Earth's magnetic field

Spacecraft and Space Missions

The Hubble Space Telescope As Cosmic-Ray Detector

Astronomers, using Hubble Space Telescope as a particle detector, have traced cosmic rays flowing in Earth's geomagnetic field.

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