Here's How to Livestream Today's Total Solar Eclipse

Joshua Hicks, iStock / Getty Images Plus
Joshua Hicks, iStock / Getty Images Plus

The last total solar eclipse stretched over the U.S. on August 21, 2017, and many people in America were lucky enough to see it from their backyards. The next total solar eclipse—which is happening today, July 2, 2019—is set to occur over parts of Chile and Argentina (including the Buenos Aires metro area) and the South Pacific Ocean, but that doesn't mean you have to catch a plane to South America to see it. As Engadget reports, NASA is broadcasting a livestream of the event online.

Streaming video from telescopes in Vicuna, Chile, will air today starting at 3 p.m. Eastern Time and last until 6 p.m. At 4 p.m. EDT, NASA will stream two one-hour programs with live commentary of the eclipse—one in English and one in Spanish. Viewers interested in catching totality, the brief period when the Moon fully blocks out the Sun, should tune in to the stream from 4:38 p.m. to 4:44 p.m.

Peak totality of this eclipse will last approximately four minutes and 33 seconds, pushing it over the length of totality of 2017's Great American Eclipse. This part of the eclipse will occur over the ocean, so not many people will get to experience it in person, but web users in any part of the world can stream it below.

NASA Live's eclipse livestream is a collaboration with the Exploratorium, an interactive science museum in San Francisco. Other live events the space agency plans to stream this month include the launch of the Soyuz spacecraft on July 20 and the liftoff of the SpaceX CRS-18 on July 21.

[h/t Engadget]

A Super Pink Moon—the Biggest Supermoon of 2020—Is Coming In April

April's super pink moon will be extra big and bright (but still white).
April's super pink moon will be extra big and bright (but still white).
jakkapan21/iStock via Getty Images

The sky has already given us several spectacular reasons to look up this year. In addition to a few beautiful full moons, we’ve also gotten opportunities to see the moon share a “kiss” with Venus and even make Mars briefly disappear.

In early April, avid sky-gazers are in for another treat—a super pink moon, the biggest supermoon of 2020. This full moon is considered a supermoon because it coincides with the moon’s perigee, or the point in the moon’s monthly orbit when it’s closest to Earth. According to EarthSky, the lunar perigee occurs on April 7 at 2:08 p.m. EST, and the peak of the full moon follows just hours later, at 10:35 p.m. EST.

How a supermoon is different.

Since the super pink moon will be closer to Earth than any other full moon this year, it will be 2020’s biggest and brightest. It’s also the second of three consecutive supermoons, sandwiched between March’s worm moon and May’s flower moon. Because supermoons only appear about 7 percent bigger and 15 percent brighter than regular full moons, you might not notice a huge difference—but even the most ordinary full moon is pretty breathtaking, so the super pink moon is worth an upward glance when night falls on April 7.

The meaning of pink moon.

Despite its name, the super pink moon will still shine with a normal golden-white glow. As The Old Farmer’s Almanac explains, April’s full moon derives its misleading moniker from an eastern North American wildflower called Phlox subulata, or moss pink, that usually blooms in early April. It’s also called the paschal moon, since its timing helps the Catholic Church set the date for Easter (the word paschal means “of or relating to Easter”).

[h/t EarthSky]

Are Any of the Scientific Instruments Left on the Moon By the Apollo Astronauts Still Functional?

Apollo 11 astronaut Neil Armstrong left the first footprint on the Moon on July 20, 1969.
Apollo 11 astronaut Neil Armstrong left the first footprint on the Moon on July 20, 1969.
Heritage Space/Heritage Images/Getty Images

C Stuart Hardwick:

The retroreflectors left as part of the Apollo Lunar Ranging Experiment are still fully functional, though their reflective efficiency has diminished over the years.

This deterioration is actually now delivering valuable data. The deterioration has multiple causes including micrometeorite impacts and dust deposition on the reflector surface, and chemical degradation of the mirror surface on the underside—among other things.

As technology has advanced, ground station sensitivity has been repeatedly upgraded faster than the reflectors have deteriorated. As a result, measurements have gotten better, not worse, and measurements of the degradation itself have, among other things, lent support to the idea that static electric charge gives the moon an ephemeral periodic near-surface pseudo-atmosphere of electrically levitating dust.

No other Apollo experiments on the moon remain functional. All the missions except the first included experiment packages powered by radiothermoelectric generators (RTGs), which operated until they were ordered to shut down on September 30, 1977. This was done to save money, but also because by then the RTGs could no longer power the transmitters or any instruments, and the control room used to maintain contact was needed for other purposes.

Because of fears that some problem might force Apollo 11 to abort back to orbit soon after landing, Apollo 11 deployed a simplified experiment package including a solar-powered seismometer which failed after 21 days.

This post originally appeared on Quora. Click here to view.

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