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NASA/JPL-Caltech/UCLA

There is new evidence to support the hypothesis that all stars are "born" with at least one "sibling" — including our sun.

Why it matters: "Our work is a step forward in understanding both how binaries form and also the role that binaries play in early stellar evolution," said UC Berkeley astronomer Steven Stahler.

Two explanations for star pairs:

  1. The two or three stars that are commonly found at the center of planetary systems fall into place together after they form.
  2. The stars at the center of a planetary system are "born" together as "siblings" — this is the favored hypothesis, and the one the new study supports.

The finding: Scientists looked at data from a dust cloud's radio waves in the Perseus constellation that had a host of baby stars. They found that the younger class of stars were closer to their "partners," while some drifted apart as they got older. The scientists then created several simulations of different ways the stars could form. The model that had stars and their twins forming at the same time produced numbers closest to what is observed.

Throwback: Since the 80s, people have speculated that the sun used to have a twin star that shared the center of our universe, even going so far as to name it "Nemesis" and blame it for the extinction of the dinosaurs.

Go deeper

Scoop: U.S. begins denying Afghan immigrants

Afghan refugees on a bus bound for temporary housing after arriving in Greece. Photo: Byron Smith/Getty Images

The Biden administration has begun issuing denials to Afghans seeking to emigrate to the United States through the humanitarian parole process, after a system that typically processes 2,000 applications annually has been flooded with more than 30,000.

Why it matters: Afghans face steeper odds and longer processes for escaping to the U.S., despite the earlier sweeping efforts by the Biden administration to assist its allies. Immigration lawyers and advocacy groups say the government has set untenable barriers to a safe haven in the U.S.

50 mins ago - Politics & Policy

Dems invoke Robert Byrd to sell Manchin on Senate rules changes

Photo illustration: Shoshana Gordon/Axios. Photos: Diana Walker, Chip Somodevilla/Getty Images

A small group of Senate Democrats is privately invoking the legacy of late West Virginia Sen. Robert Byrd in an effort to sway Sen. Joe Manchin (D-W.Va.) to support their plans to change the chamber's rules, Axios has learned.

Why it matters: Manchin — who holds Byrd's Senate seat — has often referenced his predecessor's strong moral conviction and insistence on preserving the Senate as an institution, as justification for some of his tough positions.

House votes to ban imports from Xinjiang over forced labor concerns

House Speaker Nancy Pelosi. Photo: Anna Moneymaker/Getty Images

The House voted 428-1 on Wednesday to pass a bill that would ban all imports from the Chinese region of Xinjiang unless the U.S. government determines that the products were not made with forced labor.

Why it matters: Both the Trump and Biden administrations, as well as several foreign parliaments, have recognized China's repression of Uyghurs and other Muslim minorities in Xinjiang as genocide.