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NASA's Perseverance Mars Rover has arrived at an ancient delta in Jezero Crater, one of the best places to look for signs of potential ancient life on the Red Planet. The delta is an area where scientists estimate a river once flowed into a lake billions of years ago and deposited a fan-shaped sediment.

Members of the mission will discuss the rover’s activities as it gathers samples in an ancient river delta. NASA will host a briefing at 11:30 a.m. EDT (8:30 a.m. PDT) on Thursday, Sept. 15, at the agency’s Jet Propulsion Laboratory in Southern California to provide highlights from the first year and a half of the Perseverance rover’s exploration of Mars.

The cycle of star formation is on display in this nearby nebula. Webb’s MIRI instrument captures protostars nestled deep in clouds of gas and dust, still gathering mass. Once upon a space-time, a cosmic creation story unfolded: thousands of never-before-seen young stars spotted in a stellar...