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SpaceX's Starship megarocket just notched a huge milestone, reaching orbit for the first time ever. But it still has a few other important boxes to check.

"We think early Earth might have looked a lot like a lava world."

On Sept. 29, 1977, the Soviet Union launched its Salyut 6 space station into orbit. Here's why the new home in space mattered.

A newfound amoeba just set a heat-tolerance record for multicellular organisms, widening the range of environments in which astrobiologists might find alien life.

"We are seeing an extremely overfed black hole wrapped in its own fuel."

NASA's SpaceX Crew-13 rocket and spacecraft sit on the launch pad.

Research reveals that human cells exposed to simulated microgravity for 24 hours show surprisingly few changes and suggests gravity could become a form of therapy on Earth.

Rogue black holes that break away from their cosmic homes may carry with them the histories of the galaxies they may eventually escape.

NASA is sticking with Boeing's beleaguered Starliner astronaut taxi but says the vehicle won't be ready to fly crewed missions to the International Space Station until 2028.

On Sept. 28, 1962, Canada launched its first satellite, Alouette 1, even before there was a Canadian Space Agency. Here's why it mattered.