Jared Isaacman, a billionaire entrepreneur who has twice launched to orbit in a SpaceX vehicle, faced pointed questions from senators of both parties before the Senate on Wednesday.

© Ken Cedeno/Reuters

The internet erupted in controversy over Felisa Wolfe-Simon and colleagues’ claim of a microbe thriving on arsenic. Nearly 15 years later, she’s pursuing new research on the boundaries of life.

President Trump’s executive order is altering scientific exploration across a broad swath of fields, even beyond government agencies, researchers say.

NASA and European scientists explain how they calculate the probability of the space rock 2024 YR4 impacting our planet, and why it’s not yet time to worry.

After the space agency canceled its VIPER rover, an empty space was available on a private spacecraft that will still head to the lunar surface.

The government space agency has vocally promoted diversity and inclusion for decades, even during the first Trump administration.

Researchers say there’s a 1.3 percent chance that the space rock 2024 YR4 could strike our planet — but not until December 2032.

Scientists studying samples that NASA collected from the asteroid Bennu found a wide assortment of organic molecules that shed light on how life arose.

The founder of SpaceX said President Trump had asked his company to return two astronauts aboard the space station to Earth “as soon as possible.” NASA said it would do that “as soon as practical.”

The president’s Inaugural Address linked landing on the Red Planet with Manifest Destiny, but left many of the specifics unclear.

The probe sent a signal to Earth indicating that it had survived the closest solar encounter ever attempted by a spacecraft.

As a researcher at several universities and an adviser at NASA, he used data analysis to show how the planet’s different systems are interrelated.