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.

Go deeper

Updated 15 mins ago - Politics & Policy

Coronavirus dashboard

Illustration: Aïda Amer/Axios

  1. Global: Total confirmed cases as of 4:30 p.m. ET: 20,724,799 — Total deaths: 751,399— Total recoveries: 12,873,188Map.
  2. U.S.: Total confirmed cases as of 4:30 p.m. ET: 5,234,800 — Total deaths: 166,750 — Total recoveries: 1,755,225 — Total tests: 63,731,305Map.
  3. Politics: House Democrats to investigate scientist leading "Operation Warp Speed" vaccine projectMcConnell announces Senate will not hold votes until Sept. 8 unless stimulus deal is reached.
  4. 2020: Biden calls for 3-month national mask mandateBiden and Harris to receive coronavirus briefings 4 times a week.
  5. States: Georgia Gov. Brian Kemp to drop lawsuit over Atlanta's mask mandate.
  6. Business: Why the CARES Act makes 2020 the best year for companies to lose money.
  7. Public health: Cases are falling, but don't get too comfortable.

Axios-SurveyMonkey poll: Harris boosting Biden ticket with key voters

Data: SurveyMonkey poll of 2,847 U.S. adults conducted Aug. 11–12, 2020 with ±3% margin of error; Chart: Naema Ahmed/Axios

Kamala Harris is accomplishing what Joe Biden's campaign hoped she would in her first two days as his running mate — doing no harm, while exciting parts of the base with whom Biden needs the most help.

The big picture: Black women especially, but also Black men, Hispanics and Democrats and independents across the board say they are more likely to vote for Biden with Harris on the ticket, according to a new Axios-SurveyMonkey poll.

47 mins ago - Technology

Epic sues Apple over developer tax as Fortnite is pulled from App Store

Illustration: Sarah Grillo/Axios

Fortnite maker Epic Games on Thursday escalated its battle over Apple's App Store tactics, suing the tech giant over antitrust claims while also baiting Apple into dropping Fortnite from the App Store.

The big picture: Epic is just one of several developers clashing with Apple. They argue the company harms competition by taking a cut of up to 30% on in-app purchases and subscriptions and blocking most developers from getting around the tax by charging their users directly.