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NASA's OSIRIS-REx asteroid sample return mission faces the most difficult part of its journey as it approaches Earth for atmospheric reentry and recovery. The spacecraft is on course to deliver a capsule that will touch down in a western United States desert Sept. 24, completing a seven-year journey and making it the first NASA mission to retrieve surface material from an asteroid. OSIRIS-REx launched on Sept. 8, 2016 from Cape Canaveral Space Force Base, in Florida, and began a two-year trip to rendezvous with the asteroid Bennu. The spacecraft arrived in orbit around Bennu in August 2018, where it then spent another two years scanning and mapping the asteroid's surface. On Oct. 20, 2020, after thoroughly observing Bennu's topography from orbit, OSIRIS-REx descended to the asteroid's surface and recovered material that was stowed in the spacecraft's sample return capsule. A May 2021 burn of OSIRIS-REx's propulsion system then set the probe on a 1.2 billion-mile (1.9 billion-kilometer) rendezvous course with Earth.

NASA's Goddard Space Flight Center, CI Lab Explanation: What happens when a star gets too close to a black hole? Recent observations from Earth-orbiting observatories of an event dubbed ASASSN-14li, in a distant galactic center, appears to be giving one star's harrowing story. Although angularly unresolved, variations in high energy light indicate that some of the star became shredded and reformed into a disk swirling around the dark abyss. In the hypothesized scenario envisioned, a jet formed on the spin axis of the black hole. The innermost part of the disk, colored white, glows most strongly in X-rays and may drive a periodic wind, shown in blue. Future X-ray and ultraviolet observations of stellar disruptions by black holes -- including those in the center of our own galaxy -- hold promise of telling us about the complex dynamics of some of the hottest and highest-gravity places in the universe.

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