G. Dubner (IAFE, CONICET-University of Buenos Aires) et al.; NRAO/AUI/NSF; A. Loll et al.; T. Temim et al.; F. Seward et al.; Chandra/CXC; Spitzer/JPL-Caltech; XMM-Newton/ESA; and Hubble / STScI

An amazing new image of the Crab Nebula, which is made up of the remnants of a bright supernova explosion that Chinese and other astronomers originally observed as a star in 1054, has been created by combining data from telescopes around the world.

Distance matters: The Crab Nebula is 6,500 light-years away from Earth — but NASA reports if it were 50 light-years away it would have irradiated Earth and killed off life at the time.

Why it looks the way it does: Neutrons at the center of the mass (called a pulsar), fast-moving particles coming from the pulsar, and the surrounding material that came from the original supernova explosion itself give the nebula it's unique shape.

Data from five telescopes were combined to create a new image of the nebula: The VLA (radio) in red, Spitzer Space Telescope (infrared) in yellow, Hubble Space Telescope (visible) in green, XMM-Newton (ultraviolet) in blue, and Chandra X-ray Observatory (X-ray) in purple.

Why it exploded in the first place: Stars explode when they acquire too much mass, which either happens when it's too old or when it consumes another star.

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Updated 59 mins ago - Politics & Policy

Coronavirus dashboard

Illustration: Sarah Grillo/Axios

  1. Global: Total confirmed cases as of 3 a.m. ET: 31,605,656 — Total deaths: 970,934 Total recoveries: 21,747,491Map.
  2. U.S.: Total confirmed cases as of 3 a.m. ET: 6,897,432 — Total deaths: 200,814 — Total recoveries: 2,646,959 — Total tests: 96,612,436Map.
  3. Health: The U.S. reaches 200,000 coronavirus deaths — The CDC's crumbling reputation — America turns against coronavirus vaccine.
  4. Politics: Elected officials are failing us on much-needed stimulus.
  5. Business: Two-thirds of business leaders think pandemic will lead to permanent changes — Fed chair warns economy will feel the weight of expired stimulus.
  6. Sports: NFL fines maskless coaches.

Trump pushes to expand ban against anti-racism training to federal contractors

Trump speaking at Moon Township, Penns., on Sept. 22. Photo: Mandel Ngan/AFP via Getty Images

President Trump announced late Tuesday that the White House attempt to halt federal agencies' anti-racism training would be expanded to block federal contractors from "promoting radical ideologies that divide Americans by race or sex."

Why it matters: The executive order appears to give the government the ability to cancel contracts if anti-racist or diversity trainings focused on sexual identity or gender are organized. The memo applies to executive departments and agencies, the U.S. military, federal contractors and federal grant recipients.

Louisville declares state of emergency as Breonna Taylor decision looms

A demonstrator holds up a sign of Breonna Taylor during a protest in Louisville, Kentucky. Photo: Brandon Bell/Getty Images

Louisville Mayor Greg Fischer declared a state of emergency Tuesday "due to the potential for civil unrest" ahead of Kentucky Attorney General Daniel Cameron's expected announcement on the Breonna Taylor case.

Of note: Louisville has witnessed more than 115 days of protests over the police killing of Taylor, an unarmed Black woman, with calls for all the officers involved to be charged.

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