Sep 5, 2017

Our galaxy's giant black hole has a smaller sibling

NASA/JPL-Caltech/S. Stolovy (SSC/Caltech)

By studying the motions of a particularly dense cloud of gas, astronomers have inferred the existence of a new black hole near the center of the Milky Way galaxy. It's not confirmed yet, but it's estimated to weigh in at a whopping 100,000 times the mass of our sun.

That's big, but not the biggest — that title goes to Sagittarius A*, a supermassive black hole sitting in the middle of our galaxy that has a mass 4 million times greater than our sun.

Why it matters: This "intermediate" class of black hole provides clues to the formation of their bigger cousins. It seems that every galaxy hosts a giant black hole. How do these black holes form and grow? What's the connection between giant black holes and the evolution of their host galaxies? Having a "missing link" in our own backyard helps answer those questions.

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Coronavirus dashboard

Illustration: Aïda Amer/Axios

  1. Global: Total confirmed cases as of 4 p.m. ET: 5,463,392 — Total deaths: 344,503 — Total recoveries — 2,195,325 — Map.
  2. U.S.: Total confirmed cases as of 4 p.m. ET: 1,653,904 — Total deaths: 97,948 — Total recoveries: 366,736 — Total tested: 14,163,915 — Map.
  3. World: Italy reports lowest number of new cases since February — Ireland reports no new coronavirus deaths on Monday for the first time since March 21 — WHO suspends trial of hydroxychloroquine over safety concerns.
  4. 2020: Trump threatens to move Republican convention from North Carolina — Joe Biden makes first public appearance in two months.
  5. Public health: Officials are urging Americans to wear masks over Memorial Day.
  6. Economy: New York stock exchange to reopen its floor on Tuesday — White House economic adviser Kevin Hassett says it's possible the unemployment rate could still be in double digits by November's election — Charities refocus their efforts to fill gaps left by government.
  7. What should I do? Hydroxychloroquine questions answered — Traveling, asthma, dishes, disinfectants and being contagious — Masks, lending books and self-isolating — Exercise, laundry, what counts as soap — Pets, moving and personal health — Answers about the virus from Axios experts — What to know about social distancing — How to minimize your risk.
  8. Other resources: CDC on how to avoid the virus, what to do if you get it, the right mask to wear.

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Updated 2 hours ago - Politics & Policy

Italy reports lowest number of new coronavirus cases since February

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The Italian government reported 300 new cases of coronavirus on Monday, the lowest daily increase since Feb. 29.

Why it matters: Italy, the first country in Europe to implement a nationwide lockdown after emerging as a hotspot in March, appears to have finally weathered its coronavirus outbreak. Italy has reported nearly 33,000 total deaths, the third-highest total behind the U.S. and U.K.

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Joe Biden makes first public appearance in over two months

Photo: Oliver Douliery/AFP via Getty Images

Former Vice President Joe Biden made his first in-person appearance in over two months on Monday to honor Memorial Day by laying a wreath at a Delaware veterans park, AP reports.

Why it matters: Biden, the Democratic Party's presumptive nominee, has taken the unprecedented step of campaigning from his home during the coronavirus pandemic, ever since canceling a rally in Cleveland on March 10.

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