We need to consider alternatives to dark matter that better explain cosmological observations

A composite image showing the distribution of dark matter, galaxies and hot gas in the core of a merging galaxy cluster. Credit: NASA Goddard Do constants of nature—the numbers that…

NASA mission to study mysteries in the origin of solar radio waves

CURIE will investigate where solar radio waves originate in coronal mass ejections, like this one seen in 304- and 171-angstrom wavelengths by NASA’s Solar Dynamics Observatory. Credit: NASA/Goddard Space Flight…

NASA astronauts spend unexpected July 4 on the International Space Station

Credit: Pixabay/CC0 Public Domain Astronauts Suni Williams and Butch Wilmore spent an unexpected Fourth of July aboard the International Space Station—but it was hardly a patriotic display of engineering prowess.…

Caltech’s Submillimeter Observatory Has Been Removed from Maunakea

The final components of the Caltech Submillimeter Observatory (CSO), including its foundation, silver geodesic dome, and on-site buildings, have been removed from a valley atop Maunakea in Hawai‘i, and the land at…

Crew of NASA’s earthbound simulated Mars habitat emerge after a year

by Brian P. D. Hannon In this image made from video provided by NASA, Kelly Haston, a crew member of the first CHAPEA mission, speaks in front of other members,…

Cosmic Simulation Reveals How Black Holes Grow and Evolve

A team of astrophysicists led by Caltech has managed for the first time to simulate the journey of primordial gas dating from the early universe to the stage at which…

Moon ‘swirls’ could be magnetized by unseen magmas

Mysterious, light-colored swirls on Moon’s surface could be rocks magnetized by magma activity underground, Washington University laboratory experiments confirm. Lunar swirls are light-colored, sinuous features on the Moon’s surface, bright…

Exploring the possibility of probing fundamental spacetime symmetries via gravitational wave memory

Webb captures a staggering quasar-galaxy merger in the remote universe

Map of the line emission of hydrogen (in red and blue) and oxygen (in green) in the PJ308-21 system, shown after masking the light from the central quasar (“QSO”). The…

Engineers send 3D printer into space

SpaceCAL 3D printer on VSS Unity, awaiting launch on June 8, 2024. Credit: Virgin Galactic Imagine a crew of astronauts headed to Mars. About 140 million miles away from Earth,…