Wednesday, March 31, 2021

Pentagon Releases New Policies Enabling Transgender People To Serve In The Military

The announcement coincides with International Transgender Day of Visibility and largely marks a return to regulations developed during the Obama administration.

The announcement coincides with International Transgender Day of Visibility and largely marks a return to regulations developed during the Obama administration.

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APOD - M87's Central Black Hole in Polarized Light

Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2021 March 31
Polarization of light emitted from the near the black hole M87 is pictured. See Explanation.

M87's Central Black Hole in Polarized Light
Image Credit: Event Horizon Telescope Collaboration; Text: Jayanne English (U. Manitoba)

Explanation: To play on Carl Sagan's famous words "If you wish to make black hole jets, you must first create magnetic fields." The featured image represents the detected intrinsic spin direction (polarization) of radio waves. The polarizationi is produced by the powerful magnetic field surrounding the supermassive black hole at the center of elliptical galaxy M87. The radio waves were detected by the Event Horizon Telescope (EHT), which combines data from radio telescopes distributed worldwide. The polarization structure, mapped using computer generated flow lines, is overlaid on EHT's famous black hole image, first published in 2019. The full 3-D magnetic field is complex. Preliminary analyses indicate that parts of the field circle around the black hole along with the accreting matter, as expected. However, another component seemingly veers vertically away from the black hole. This component could explain how matter resists falling in and is instead launched into M87's jet.

Tomorrow's picture: cleaning mars


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Tuesday, March 30, 2021

APOD - Red Sprite Lightning over the Andes

Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2021 March 30
Several red sprite lightning plumes are pictured over the Andes Mountains. See Explanation.

Red Sprite Lightning over the Andes
Image Credit & Copyright: Yuri Beletsky (Carnegie Las Campanas Observatory, TWAN)

Explanation: What are those red filaments in the sky? They are a rarely seen form of lightning confirmed only about 30 years ago: red sprites. Recent research has shown that following a powerful positive cloud-to-ground lightning strike, red sprites may start as 100-meter balls of ionized air that shoot down from about 80-km high at 10 percent the speed of light. They are quickly followed by a group of upward streaking ionized balls. The featured image was taken earlier this year from Las Campanas observatory in Chile over the Andes Mountains in Argentina. Red sprites take only a fraction of a second to occur and are best seen when powerful thunderstorms are visible from the side.

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Tomorrow's picture: black hole polarized


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Energy zappers. Spring cleaning. YouTube workouts.

Having a meal or snack usually tends to refuel your tank, helping you feel more energetic. But these seven foods can leave you feeling wiped out.

NPR/Marist Poll: Biden Gets High Marks On COVID-19. It's Not The Case On Immigration

Two-thirds of Americans approve of how Biden is handling the pandemic, but only a third approves of how he's dealing with immigration. An increasing number also say they will get vaccinated.

Two-thirds of Americans approve of how Biden is handling the pandemic, but only a third approves of how he's dealing with immigration. An increasing number also say they will get vaccinated.

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Monday, March 29, 2021

APOD - M64: The Evil Eye Galaxy

Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2021 March 29
Messier 64, the Evil Eye Galaxy, is pictured. See Explanation.

M64: The Evil Eye Galaxy
Image Credit: ESA/Hubble & NASA & the PHANGS-HST Team; Acknowledgement: Judy Schmidt

Explanation: Who knows what evil lurks in the eyes of galaxies? The Hubble knows -- or in the case of spiral galaxy M64 -- is helping to find out. Messier 64, also known as the Evil Eye or Sleeping Beauty Galaxy, may seem to have evil in its eye because all of its stars rotate in the same direction as the interstellar gas in the galaxy's central region, but in the opposite direction in the outer regions. Captured here in great detail by the Earth-orbiting Hubble Space Telescope, enormous dust clouds obscure the near-side of M64's central region, which are laced with the telltale reddish glow of hydrogen associated with star formation. M64 lies about 17 million light years away, meaning that the light we see from it today left when the last common ancestor between humans and chimpanzees roamed the Earth. The dusty eye and bizarre rotation are likely the result of a billion-year-old merger of two different galaxies.

Tomorrow's picture: sprite mountain


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Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
NASA Web Privacy Policy and Important Notices
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'She's Free!': Giant Container Ship Blocking Suez Canal Underway After Days

The Ever Given had been wedged at an angle across the Suez Canal since Tuesday, preventing other shipping vessels from traveling through the waterway.

The Ever Given had been wedged at an angle across the Suez Canal since Tuesday, preventing other shipping vessels from traveling through the waterway.

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Sunday, March 28, 2021

COVID-19 In Brazil; Shoppers And Their Stimulus Cash; The Cicadas Are Coming!

Plus, Sting plays a Tiny Desk Home Concert.