Solving the Mystery of Varying Red Giants
Scientists have long puzzled over slow and regular variations in the brightness of many evolved giant stars. Have we now found an explanation?
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Raising Tides on Jupiter with Its Moons
What happens to the inside of a gas-giant planet as a consequence of the gravitational pulls of its moons?
As Different As Day and Night
Finding water on exoplanets is exciting enough, but we may also be able to use signs of water to learn more about a planet’s atmosphere.
Redefining a Heavy Collision
Could the biggest — literally — gravitational-wave discovery yet be something other than what it initially seemed?
Switching It Up with Solar Switchbacks
Scientists may have an explanation for the strange kinks recently observed in streams of plasma flowing off of the Sun.
Multimessenger Cosmology of the Future
The collisions of neutron stars and black holes may be the key to unlock precise measurements of the cosmological parameters that describe our universe.
Flares from the Milky Way’s Supermassive Black Hole
In 2019, Sgr A* woke up to emit a series of burps. What meal led to this indigestion?
Bending Rays ‘Round the Sun
A recent study couples Cassini observations with ground-based ones to study how galactic cosmic rays interact with our Sun.
Seeking the Origins of Galactic Stellar Streams
New work has revealed the likely origins of 23 streams of stars in our galaxy’s halo.
Establishing Ages from Mars’s Craters
How old is the terrain of Mars’s surface? New research suggests our previous estimates were off.