Watch live as NASA launches the SPHEREx telescope and PUNCH mission aboard a SpaceX Falcon 9 rocket to explore the universe and the sun. SPHEREx will create a 3D all-sky map of 450 million galaxies, ...

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Seven planets will line up for a rare "planetary parade" today (Feb. 28) and you can watch it live online, beginning at 12:00 p.m. ET (1700 GMT).

The SPHEREx project will investigate what occurred in the first second after the Big Bang. Meanwhile, the PUNCH mission will study the Sun’s corona and how it transitions into the solar wind.

A space-based telescope has captured new images of the sun that showcase one of our star's fiery outbursts. Coincidentally, also visible in the new images is the planet Mercury, appearing as a ...