Aug 17, 2017

Chasing the eclipse with airborne telescopes

Our Expert Voices conversation about the 2017 solar eclipse.

One big question scientists still have about the Sun is why its corona, the outer atmosphere, is so hot — millions of degrees — while the surface below is only thousands! Eclipses provide unique opportunities to get higher quality and speed images than are normally available, either from space or from the ground. During the total eclipse, we're using telescopes mounted on the noses of NASA's WB-57 research jets to observe the solar corona. By observing waves in it and measuring their direction, size, and speed, we hope to better understand how energy is transported up into the corona. With two jets flying at 50,000 feet, we'll get 7-and-a-half minutes of totality compared to only 2-and-a-half on the ground.

What it means: Studying how the corona is formed and how it evolves will lead to better understanding "space weather" hazards like flares and coronal mass ejections that can impact Earth and damage satellites, interrupt GPS and radio, and knock out power grids.

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Updates: George Floyd protests nationwide

Police officers wearing riot gear push back demonstrators outside of the White House on Monday. Photo: Jose Luis Magana/AFP via Getty Images

Protests over the death of George Floyd and other police-related killings of black people continued for a seventh day across the U.S., with President Trump threatening on Monday to deploy the military if the unrest continues.

The latest: Virginia's Arlington County Police Department said in a statement it withdrew officers from D.C. Monday night after being "put in a compromising position" after they were seen assisting military police and park rangers who used tear gas on peaceful protesters so Trump could walk to John’s Episcopal Church, near the White House.

46 mins ago - Technology

Civil rights leaders blast Facebook after meeting with Zuckerberg

Screenshot of an image some Facebook employees used as part of their virtual walkout on Monday.

A trio of civil rights leaders issued a blistering statement Monday following a meeting with Facebook CEO Mark Zuckerberg and other top executives to discuss the social network's decision to leave up comments from President Trump they say amount to calls for violence and voter suppression.

Why it matters: While Twitter has flagged two of the president's Tweets, one for being potentially misleading about mail-in ballot procedures and another for glorifying violence, Facebook has left those and other posts up, with CEO Mark Zuckerberg saying he doesn't want to be the "arbiter of truth."

2 hours ago - Technology

Cisco, Sony postpone events amid continued protests

Screenshot: Axios (via YouTube)

Cisco said Monday night that it is postponing the online version of Cisco Live, its major customer event, amid the ongoing protests that have followed the killing of George Floyd.

Why it matters: Cisco joins Sony, Electronic Arts and Google in delaying tech events planned for this week.