Results from the Hubble Space Telescope suggest there could be substantial amounts of water on some of the seven, Earth-sized planets orbiting the dwarf star TRAPPIST-1, which is 40 lightyears away, according to a Hubble Space Telescope press release.

Why it matters: Three of these planets fall within Trappist-1's 'habitable zone', which means the planets are the right distance from their star to theoretically support life. When they were discovered earlier this year, scientists suspected there would be water on these planets, but this is the first evidence that it hasn't been all been blown away by the star's radiation.

MIT's Julien de Wit, a co-author on the study: "This concludes that a few of these outer planets could have been able to hold onto some water, if they accumulated enough during their formation. But we need to gather more information and actually see a hint of water, which we haven't found yet."

How it happened: Scientists speculate that the planets were born in the icy outer reaches of their system, and captured water as they were born. When ultraviolet radiation from a star hits a planet's atmosphere, it can break up water there into its constituents oxygen and hydrogen, which can then escape the atmosphere and be detected as an indicator of water. The Hubble researchers used the telescope to measure UV radiation from the star and found that enough was emitted that the inner planets may have lost most of any water that was once there, but three outer planets could still hold water today.

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Coronavirus dashboard

Illustration: Aïda Amer/Axios

  1. Global: Total confirmed cases as of 4:30 p.m. ET: 21,020,216 — Total deaths: 761,393— Total recoveries: 13,048,303Map.
  2. U.S.: Total confirmed cases as of 4:30 p.m. ET: 5,289,323 — Total deaths: 167,948 — Total recoveries: 1,774,648 — Total tests: 64,831,306Map.
  3. Health: CDC: Survivors of COVID-19 have up to three months of immunity Fauci believes normalcy will return by "the end of 2021" with vaccine — The pandemic's toll on mental health.
  4. Business: How small businesses got stiffed — Unemployment starts moving in the right direction.
  5. Cities: Coronavirus pandemic dims NYC's annual 9/11 Tribute in Light.
  6. Politics: Biden signals fall strategy with new ads.

Harris: "Women are going to be a priority" in Biden administration

Sen. Kamala Harris at an event in Wilmington, Del. Photo: Drew Angerer/Getty Images

In her first sit-down interview since being named Joe Biden's running mate, Sen. Kamala Harris talked about what she'll do to fight for women if elected VP, and how the Democrats are thinking about voter turnout strategies ahead of November.

What they're saying: "In a Biden-Harris administration women are going to be a priority, understanding that women have many priorities and all of them must be acknowledged," Harris told The 19th*'s Errin Haines-Whack.

Facebook goes after Apple

Illustration: Lazaro Gamio/Axios

Facebook is seeking to force a face-off with Apple over its 30% in-app purchase commission fee, which Facebook suggests hurts small businesses struggling to get by during the pandemic.

The big picture: Facebook has never publicly gone after Apple, a key strategic partner, this aggressively. Both companies face antitrust scrutiny, which in Apple's case has centered on the very fee structure Facebook is now attacking.