An artist's depiction of neutron star merger. Credit: NSF / LIGO / Sonoma State University / A. Simonnet

Scientists announced today they've detected the collision of two neutron stars 130 million years ago. It's the first time one of the massive mergers has been witnessed, and that light detected with telescopes has been combined with gravitational waves detection to observe a cosmic event.

What it means: "This result provides definitive evidence for the first time that heavy elements like platinum and gold, are produced in these collisions," David Reitze, executive director of the LIGO Laboratory, whose founders will collect the Nobel Prize in physics this year. The so-called "multi-messenger astronomy" allows researchers to view events in both light and sound, and will be used to better understand the structure of stars, the rate of expansion of the universe and other fundamental questions in physics.

What they saw: 130 million years ago, two dense neutron stars — with masses 1.6 and 1.1 times those of our sun crammed into about 10-mile-wide spaces — merged. The highly energetic event sent ripples across space and time that physicists working with the Laser Interferometer Gravitational-Wave Observatory (LIGO) and Virgo detectors observed on Aug. 17, 2017. The collision, which occurred relatively close to Earth, released high-energy, gamma-ray light that was also then seen by 70 optical, X-ray, radio, ultraviolet, infrared, and gamma-ray telescopes around the world and in space over the following days.

What's next: Dozens of papers are being published today by the more than 3500 researchers involved in the work. The LIGO and Virgo detectors have finished their current run and will be offline for a year while researchers try to optimize them. "[They are] currently working at a fraction of their sensitivity. We expect to increase the overall network sensitivity by about a factor of 2," said LIGO spokesperson David Shoemaker. That would open up 8 times more space for surveying and, they hope, observing other events like supernovae.

Go deeper: Quanta's Katia Moskvitch has the play-by-play of the detection.

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Senate to vote on Amy Coney Barrett's confirmation on Oct. 26

Senate Majority Leader Mitch McConnell (R-KY) in the Capitol on Oct. 20. Photo: Stefani Reynolds/Getty Images

The Senate will vote to confirm Judge Amy Coney Barrett to the Supreme Court next Monday, Oct. 26, Majority Leader Mitch McConnell (R-Ky.) announced Tuesday.

The big picture: The Senate Judiciary Committee will vote this Thursday to advance Barrett's nomination to the full Senate floor. Democrats have acknowledged that there's nothing procedurally that they can do to stop Barrett's confirmation, which will take place just one week out from Election Day.

Updated 1 hour ago - Politics & Policy

Coronavirus dashboard

Illustration: Aïda Amer/Axios

  1. Politics: Americans feel Trump's sickness makes him harder to trustFlorida breaks record for in-person early voting.
  2. Health: The next wave is gaining steam.
  3. Education: Schools haven't become hotspots.
  4. World: Ireland moving back into lockdown — Argentina becomes 5th country to report 1 million infections.

Meadows confirms Trump's tweets "declassifying" Russia documents were false

Photo: Tom Williams-Pool/Getty Images

White House Chief of Staff Mark Meadows confirmed in court on Tuesday that President Trump's tweets authorizing the disclosure of documents related to the Russia investigation and Hillary Clinton's emails "were not self-executing declassification orders," after a federal judge demanded that Trump be asked about his intentions.

Why it matters: BuzzFeed News reporter Jason Leopold cited the tweets in an emergency motion seeking to gain access to special counsel Robert Mueller's unredacted report as part of a Freedom of Information Act request. This is the first time Trump himself has indicated, according to Meadows, that his tweets are not official directives.

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