Technology: SpaceX Starlink satellites dazzle but may cause headaches for astronomers - PressFrom - US
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TechnologySpaceX Starlink satellites dazzle but may cause headaches for astronomers

10:40  28 may  2019
10:40  28 may  2019 Source:   cnet.com

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Less than 24 hours after SpaceX 's launch of the first 60 Starlink satellites , amateur astronomer Dr. Marco Langbroek (sattrackcam.blogspot.com) captured

SpaceX launched 60 Starlink satellites in a train Thursday ( May 24) and A train of SpaceX Starlink satellites are visible in the night sky in this still from a video captured by But not a few astronomers were annoyed by the idea of having yet another bright satellite disrupting their view of the night sky.

SpaceX Starlink satellites dazzle but may cause headaches for astronomers© Marco Langbroek

Those aren't an intelligent extra-terrestrial army moving in to take over planet Earth -- they're just SpaceX'sStarlink satellites, designed to provide broadband services across the globe.

The first batch of satellites were successfully launched from Cape Canaveral, Florida and deployed to orbit by a Falcon 9 rocket on May 23. They contain a single solar array, which both captures and bounces sunlight off the satellites and, as a result, can sometimes be seen from Earth. On May 25, as the drifting luminescent army of satellites zoomed overhead, Dutch satellite tracker Marco Langbroek captured their marching, posting a stunning video to his Vimeo.

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The first 60 satellites in SpaceX 's huge Starlink constellation haven't experienced any hiccups in orbit thus far. A view of SpaceX 's first 60 Starlink satellites in orbit, still in stacked configuration, with the Earth as a brilliant blue backdrop on May 23, 2019.

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In time, the satellites will drift further apart and are designed to hold specific orbits so that satellite internet coverage can be beamed to every corner of the globe.

However, as the unusual display in the night sky quickly gathered steam across social media, some astronomers began to point out the potential problems the satellite system may pose for radio astronomy. At present, only 60 satellites are moving into their orbit, but eventually that number will reach 12,000 and a megaconstellation will encircle the Earth. That would nearly triple the current amount of satellites currently orbiting the Earth.

With such a huge number of satellites, will our view of space and the stars be forever obstructed?

The quick answer: Not forever, no -- SpaceX are designing Starlink satellites to fall back to the Earth after about five years of service, burning up in the atmosphere on their way back in. But the long answer is: Potentially. Astronomers already wrangle with the problems posed by space robots and satellites circling the Earth whenever they turn their ground-based telescopes toward the stars. Bright, reflective surfaces pose a problem because they obstruct our view of the universe and thus cloud our vision.

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Astronomers are up in arms about the impact SpaceX 's Starlink constellation could have, and fear our views of the night sky could be ruined forever. On Thursday, May 23, Elon Musk’s SpaceX successfully launched its first 60 Starlink satellites , a planned mega constellation of satellites

The Starlink satellite train as seen shortly before 1:00 am in the Netherlands on May 25, 2019 A satellite tracker in the Netherlands has captured stunning video of dozens of SpaceX Starlink Marco Langbroek, a spy satellite tracker and astronomer , spotted the string of Starlink satellites from a

More satellites equals cloudier eyeballs and Starlink plans to launch more satellites than ever.

When the sun is reflecting off the satellite's solar panels, visual astronomers will have to account for the appearance of the satellites in their image. SpaceX was relatively mum about the design of the satellites leading up to launch, so it has come as a bit of a surprise to some astronomers just how bright they were. However, the satellites will position their solar panels as they establish themselves in orbit which should reduce their brightness.

Jonathan McDowell, an astronomer with the Harvard-Smithsonian Center for Astrophysics, perhaps summed it up best with this tweet:

"Somewhat less of a sky-is-on-fire problem" sounds slightly reassuring, at least. But there does seem to be clear issues for the astronomy community and they are concerned with how Starlink will hinder their observations going forward.

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The launch of SpaceX 's Starlink Internet satellites has sparked concerns from astronomers of what they will do to the night sky. When Starlink was proposed astronomers anticipated the satellites would be faint enough to limit the problem. With the first deployment proving brighter than expected

Amateur astronomer captures the amazing moment dozens of Starlink satellites soar through the sky in single file, after SpaceX launch sparked UFO fears. A stargazer in the Netherlands captured Starlink satellites as the orbit Earth. The instruments appear as consecutive dots of light in the night sky.

Elon Musk , SpaceX CEO, jumped to the defense of his satellite system and noted on Twitter how "potentially helping billions of economically disadvantaged people is the greater good," while making it clear that SpaceX plans to limit Starlink's effects on astronomy. "We care a great deal about science," Musk tweeted. He claims that he has sent a note to the Starlink team to reduce albedo -- decreasing the amount of light the satellites reflect.

In addition, after a user suggested placing space telescopes using the same Starlink chassis into orbit to appease the astronomers, Musk said he "would love to do exactly that." That might ease concerns, but will it totally alleviate them?

SpaceX Starlink satellites have astronomers amplifying the cosmic alarm.
Elon Musk's plan to bring broadband to rural parts of the globe could come with unintended side effects, the scientists say.

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