May 6, 2020 - Science

Newfound black hole lurks just 1,000 light-years from Earth

Miriam Kramer, author of Space

Artist's illustration of two stars orbiting a black hole. Photo: ESO/L. Calçada

A black hole found just 1,000 light-years from Earth is the closest yet found to our planet.

Why it matters: The relatively nearby black hole — which is orbited by two stars — presents scientists with the opportunity to learn more about these mysterious objects by studying one not too far from our own part of the galaxy.

"There must be hundreds of millions of black holes out there, but we know about only very few. Knowing what to look for should put us in a better position to find them," Thomas Rivinius, an author of the new study about the black hole in the journal Astronomy & Astrophysics, said in a statement.

Details: The black hole is about four times the mass of the Sun, and unlike many of the other black holes found in our galaxy, it isn't actively feeding off of its surroundings.

  • Instead, the black hole is "truly black," according to the researchers who discovered it, and isn't gobbling up surrounding matter, which would cause it to glow in X-ray light.
  • The two stars circling the black hole effectively appear to be orbiting a black point in space, which can only be a black hole.
  • Keen observers in the Southern Hemisphere may even be able to see the stars that circle the black hole with the naked eye from dark areas.

Context: Scientists think that the type of black hole found in the HR 6819 system form during the deaths of massive stars, but other, larger black holes like the one in the center of the Milky Way form through different, still unknown means.

What's next: The scientists behind the new study think that there is already another good candidate system that looks similar to HR 6819.

  • "LB-1 is a bit further away from Earth but still pretty close in astronomical terms, so that means that probably many more of these systems exist," Marianne Heida said in the statement.
  • Astronomers also think they can study these systems to learn more about how gravitational waves — which are caused by the mergers of two massive objects that literally ripple the fabric of space and time — occur in a system with three large objects.

Go deeper: The hunt for a new kind of black hole

Go deeper

Increased armed presence planned for D.C. tonight

Demonstrators stand around a fire during a protest near the White House in response to the killing of George Floyd. Photo: Alex Wong/Getty Images

Government officials say plans are in place for a significantly heavier armed presence on the streets of Washington, D.C. tonight in response to the increasingly violent protests linked to the death of George Floyd.

The big picture: Despite Trump's endorsement of Sen. Tom Cotton's (R-Ark.) idea of deploying active-duty military forces, including the 101st Airborne, there are no current plans to federalize forces to deal with riots across the country.

Updated 21 mins ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Global: Total confirmed cases as of 4 p.m. ET: 6,226,408 — Total deaths: 373,973 — Total recoveries — 2,672,161Map.
  2. U.S.: Total confirmed cases as of 4 p.m. ET: 1,799,747 — Total deaths: 104,702 — Total recoveries: 444,758 — Total tested: 16,936,891Map.
  3. Public health: Nearly 26,000 coronavirus deaths in nursing homes have been reported to federal health officials —Coronavirus looms over George Floyd protests across the country.
  4. Federal government: Trump lashes out at governors, calls for National Guard to "dominate" streets.
  5. World: Former FDA commissioner says "this is not the time" to cut ties with WHO.
  6. 🎧 Podcast: The virus didn't go away.

New York City to impose curfew amid ongoing protests

Photo: Lev Radin/Pacific Press/LightRocket via Getty Images

New York City will be placed under curfew on Monday from 11pm until 5am Tuesday morning following days of protests over the death of George Floyd, Gov. Andrew Cuomo and Mayor Bill de Blasio announced Monday.

The big picture: Demonstrations in New York, like in cities across the country, turned violent over the weekend as protesters clashed with police late into the night. The number of police officers on the streets of New York will double from 4,000 to 8,000.