Apr 13, 2017

Meet Enceladus, Saturn's tiny moon that might harbor life

NASA / JPL / Space Science Institute

Some quick facts about Enceladus, Saturn's moon that's some 790 million miles distant from Earth and may contain the building blocks of life, if not microbial life itself:

  • It's Saturn's sixth-largest moon at about 310 miles in diameter — roughly 14% of the size of Earth's moon.
  • The moon is covered in a layer of clean ice that makes it the most reflective body in our Solar System, reflecting so much sunlight that its surface only reaches an average noontime temperature of -324 °F.
  • It likely has a warm ocean of salty water below its ice layer that's around 17 miles deep. Compare that to Earth's average ocean depth of 2.3 miles.
  • The oceanic plumes that indicate Enceladus' geological activity are the source of material for one of Saturn's rings.

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Coronavirus dashboard

Illustration: Eniola Odetunde/Axios

  1. Global: Total confirmed cases as of 7 p.m. ET: 1,504,971 — Total deaths: 87,984 — Total recoveries: 318,068Map.
  2. U.S.: Total confirmed cases as of 7 p.m. ET: 424,945 — Total deaths: 14,529 — Total recoveries: 23,292Map.
  3. Federal government latest: Top Trump administration officials had been developing a plan to give cloth masks to huge numbers of Americans, but the idea lost traction amid heavy internal skepticism.
  4. States latest: Chicago's Cook County jail is largest-known source of coronavirus in U.S.
  5. Business update: One-third of U.S. jobs are at risk of disappearing, mostly affecting low-income workers.
  6. World update: WHO Director-General Tedros Adhanom Ghebreyesus urged countries to put politics aside "if you don’t want to have many more body bags.”
  7. Environment update: COVID-19 is underscoring the connection between air pollution and dire outcomes from respiratory diseases.
  8. What should I do? Pets, moving and personal healthAnswers about the virus from Axios expertsWhat to know about social distancingQ&A: Minimizing your coronavirus risk.
  9. Other resources: CDC on how to avoid the virus, what to do if you get it.

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The pandemic and pollution

New York City's skyline on a smoggy day in May 2019. Photo: Drew Angerer/Getty Images

COVID-19 is underscoring the connection between air pollution and dire outcomes from respiratory diseases.

Why it matters: Old-fashioned air pollution is almost certainly the single biggest environmental health threat, contributing to the deaths of some 7 million people a year according to the WHO, making it comparable to deaths from smoking.

Go deeperArrow2 hours ago - Health

U.S. coronavirus updates: Chicago jail is largest-known source of coronavirus

Data: The Center for Systems Science and Engineering at Johns Hopkins; Map: Andrew Witherspoon/Axios

Chicago's Cook County jail is the largest-known source of coronavirus infections in the U.S., the New York Times reports. The White House has identified Chicago's metro area as a risk for exponential growth of the virus.

Why it matters: Public health officials have warned this would be a particularly deadly week for America, even as New York began to see declining trends of hospitalizations and ICU admissions.

Go deeperArrowUpdated 3 hours ago - Health