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Photo: NASA/ESA

A large cluster of stars 19,000 light-years from Earth harbors something strange: Within the cluster, a neutron star left over after a supernova explosion orbits a star not too different from our Sun.

The big picture: The Chandra observatory has been observing that star system — known as Terzan 5 CX1 — for more than a decade, and in that time, Terzan 5 CX1 has gone from looking like one type of star system to another and back again.

  • As that neutron star orbits the other in the pair, its immense gravity pulls material from the companion star, forming a disk around the neutron star.
  • All that material falling in on the neutron star makes it spin quickly, blowing away any extra material encircling the star and transforming it into what's known as a millisecond pulsar.

Yes, but: Chandra found this star system has gone from behaving like a more typical binary to a millisecond pulsar and then back again.

  • It's not yet clear why the pair has done this dance multiple times, but scientists expect this is a phase in the evolution of these types of star systems.

Go deeper: Space tourism gets ready for launch

Go deeper

Trump says he plans to launch new social media network in 2022

Photo: Chris Delmas/AFP via Getty Images

Former President Trump on Wednesday announced plans to launch a social media network called "Truth Social," and that it would go public via a SPAC.

Why it matters: Most ex-presidents are focused on their legacies, by creating presidential libraries or engaging in philanthropic endeavors. Trump, however, remains consumed by social media.

Beauty giant Coty Cosmetics looking to sell its own branded products

Coty Cosmetics CEO Sue Nabi. Photo: Axios on HBO

Coty Cosmetics CEO Sue Nabi tells Axios the beauty giant will “probably” introduce Coty-branded products one day.

Why it matters: Coty produces some of the world’s most popular fragrances, skin care products and color cosmetics on behalf of other well-known brands, but has shied away from producing its own branded products.

3 hours ago - Sports

NFL to end race-based testing in concussion settlements

Photo: Brett Carlsen/Getty Images

The National Football League on Wednesday reached an agreement with former players to end the controversial practice of race-based adjustments in dementia testing, AP reports.

Why it matters: The deal, which must still be approved by a judge, comes amid a broader discussion of racial inequities in health care.