Technology SpaceX rocket carved giant hole in the ionosphere

19:51  26 march  2018
19:51  26 march  2018 Source:   engadget.com

Musk deletes Facebook pages of Tesla, SpaceX after challenged on Twitter

  Musk deletes Facebook pages of Tesla, SpaceX after challenged on Twitter Verified Facebook pages of Elon Musk's rocket company SpaceX and electric carmaker Tesla Inc disappeared on Friday, minutes after the Silicon Valley billionaire promised on Twitter to take down the pages when challenged by users. "Delete SpaceX page on Facebook if you're the man?" a user tweeted to Tesla Chief Executive Musk. His response: "I didn't realize there was one. Will do." Facebook pages of SpaceX and Tesla, which had millions of followers, are no longer accessible.Musk had begun the exchange by responding to a tweet from WhatsApp co-founder Brian Acton on the #deletefacebook tag.

SpaceX 's rocket , however, was carrying such a light payload (Formosat-5 weighed just 1,047 pounds) that it could and did take a near-vertical path. The ionosphere hole didn't cause much chaos by itself.

The Falcon 9 rocket slashed a 559-mile (900km) hole in the ionosphere that lasted for up to 3 hours, researchers at Taiwan's National Cheng Kung University found. Share or comment on this article: SpaceX Falcon 9 rocket carved a giant hole in Earth's atmosphere.

  SpaceX rocket carved giant hole in the ionosphere © Provided by Engadget Rockets can leave a mark on the atmosphere well after they've left, and SpaceX may have learned that first-hand. Researchers have determined that a Falcon 9 launch in August 2017 (the Formosat-5 mission above) not only created circular shockwaves, but cut a 559-mile hole in the plasma of the ionosphere that lasted for up to 3 hours -- it was akin to a localized magnetic storm. The phenomenon was produced by virtue of the rocket's light payload.

As Ars Technica noted, most rockets have a curved trajectory to reduce the effect of gravity and alleviate stress. SpaceX's rocket, however, was carrying such a light payload (Formosat-5 weighed just 1,047 pounds) that it could and did take a near-vertical path. Think of it as dropping a rock in the water instead of skipping it -- you're going to create a much bigger splash.

Dustin Johnson hit the longest drive ever on the PGA Tour. But it won’t count as a record.

  Dustin Johnson hit the longest drive ever on the PGA Tour. But it won’t count as a record. The distance debate in golf is racing headlong <g class="gr_ gr_5 gr-alert gr_gramm gr_inline_cards gr_run_anim Grammar multiReplace" data-gr-id="5" id="5">in</g> a five or six-car pileup. The “five families” that make up the most important ruling bodies all seem to have different stances on this.&nbsp;This week, it flew as far as ever recorded during a PGA Tour event. Dustin Johnson had a poor showing in the WGC Dell Match Play, but he didn’t leave town without reminding us why he’s a force this game has not really seen. Late in his final match, DJ uncorked a 489-yard drive. That is not a misprint. It was not 389 yards. It was 489, as in 11 yards shy of 500.

SpaceX launched a large, temporary hole in the ionosphere last year - infoglitz.com. Madison Bumgarner injury puts giants in an impossible situation. The rocket exhaust also carved a 900-kilometre-wide hole in the ionospheric plasma.

SpaceX launched a large, temporary hole in the ionosphere last year - infoglitz.com. Madison Bumgarner injury puts giants in an impossible situation. The rocket exhaust also carved a 900-kilometre-wide hole in the ionospheric plasma.

The ionosphere hole didn't cause much chaos by itself. However, more frequent and more powerful launches with these kinds of disruptions could significantly skew GPS navigation. Rocket operators may have to watch their launches going forward to be sure they don't play havoc with phones and cars on the ground below.

Wiley

Milky Way core may harbour thousands of black holes: study .
Astrophysicists have detected a dozen black holes at the centre of our Milky Way galaxy, and said Wednesday there could be as many as 10,000. The find provides the first evidence for a long-held theory that the massive black hole at the core of every large galaxy should be surrounded by thousands of smaller ones, they wrote in the science journal Nature."We observed a dozen black holes" around Sagittarius A, the black hole at the centre of the Milky Way, said study co-author Chuck Hailey, an astrophysicist at New York's Columbia University."But this is the tip of the iceberg," he told AFP.

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