In observations conducted between April 5 and April 10, 2017, the team looked at the relativistic jet produced by OJ 287, a ...

Two million years ago, an encounter with a cold cloud of gas and dust could have caused our planet's "protective giant bubble" to draw back, potentially cooling our planet, new research claims. When ...

The process, which existed for billions of years, would eventually turn lunar soil into a long-running archive of Earth's ...

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Scientists think Earth may have undergone at least two extreme freeze events throughout its history, becoming a so-called “snowball Earth” with a surface covered by ice. What triggered these events is ...

A look at the most-read space stories of 2025, covering satellite activity, space missions, scientific discoveries, and natural events observed from Earth ...

In “Citizen Science in Astronomy (Part 7),” SETI Institute astronomers Dr. Franck Marchis and Dr. Lauren Sgro highlight two rare and compelling discoveries and the crucial role of citizen scientists ...

A stunning photo from the International Space Station connects Earth's aurora and city lights with the distant Andromeda ...