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A surprise discovery in Gale Crater is the component that was missing in the puzzle of Mars‘s climate history. There, embedded in the bedrock, the Curiosity rover has identified a mineral called siderite that can only have formed from the precipitation of carbon from the Martian atmosphere. In other words, billions of years ago, Mars had an active […]

Over 46 years since its release, Voyager 1—NASA’s farthest and oldest spacecraft—has returned a message from the boundary of our solar system that’s disrupting the way we consider the space outside our solar neighborhood. What it confirmed is something scientists have long theorized but never actually established—until now. The interface between our solar system and

Astronomers have stumbled on a black hole roughly 600,000 times more massive than the Sun in a dwarf galaxy next to the Milky Way, according to a new study to be published in The Astrophysical Journal. Researchers inferred the black hole’s presence from the trajectories of 21 hypervelocity stars zipping through the Milky Way’s outskirts, finding that