Sir Richard Branson is weightless in space on his Virgin Galactic passenger rocket plane.

Billionaires in the great beyond

Scientists weigh in on the first successful civilian trips to space, and the ethics of being a billion-dollar rocket man.

Astronaut on a spacewalk

Space travel weakens our immune systems — now scientists may know why

As private citizens express interest in going to space, a late UCSF astronaut may have figured out an important riddle.

Cosmic dawn still image from a video simulation

Cosmic dawn occurred 250 to 350 million years after Big Bang

The formation of the first stars occurred 250 to 350 million years after the beginning of the universe, according to new UC Santa Cruz research.

Illustration shows a Super Venus planet on the left and a Super Earth on the right.

UC Riverside joins forces with NASA on missions to Venus

The trips hope to illuminate how Earth’s evil twin became uninhabitable.

Megan McArthur portrait in NASA blues

One astronaut’s amazing Earth Day — getting ready to pilot a flight to the International Space Station

Alumna Megan McArthur to return to space as pilot of NASA’s SpaceX Crew-2 mission, set to launch Friday, April 23.

Rendering of the NASA Perseverance rover on Mars

Q&A: David Paige on the Feb. 18 Mars Perseverance landing

The UCLA planetary scientist is deputy principal investigator for one of the NASA rover’s experiments.

Bruce Willis and cast of Armageddon walking in spacesuits

What Hollywood gets wrong (and right!) about protecting the Earth from asteroids

Meet Kirsten Howley, the real-life Lawrence Livermore National Laboratory astrophysicist working to prevent “Armageddon,” as UC celebrates the International Day of Women and Girls in Science (Feb. 11).

Arianna Long portrait

Arianna’s long path to the stars

An astrophysicist faces the universe’s darkness with help from those around her and from the stars above her.

Astronauts and a facility on Mars illustration

Making methane on Mars

How physicists are making a return trip from the Red Planet a possibility.

Charlie Townes with Reinhard Genzel

UC Berkeley played big role in Nobel Prize-winning work

Reinhard Genzel realized his mentor Charles Townes’ dream of exploring the center of the Milky Way on his way to his own Nobel Prize.