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Old February 25th, 2019, 06:38 PM   #4701
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Marvellous. Core stage reentry is amazing!
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Old February 27th, 2019, 10:54 AM   #4702
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Old February 27th, 2019, 12:24 PM   #4703
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Old March 3rd, 2019, 10:31 PM   #4704
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Old March 14th, 2019, 02:58 AM   #4705
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https://edition.cnn.com/2019/03/13/w...rnd/index.html

This is the Opportunity rover's final photo of Mars

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Old March 18th, 2019, 09:11 AM   #4706
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https://www.bbc.com/news/science-environment-47607696

US detects huge meteor explosion



A huge fireball exploded in the Earth's atmosphere in December, according to Nasa.
The blast was the second largest of its kind in 30 years, and the biggest since the fireball over Chelyabinsk in Russia six years ago.
But it went largely unnoticed until now because it blew up over the Bering Sea, off Russia's Kamchatka Peninsula.
The space rock exploded with 10 times the energy released by the Hiroshima atomic bomb.
Lindley Johnson, planetary defence officer at Nasa, told BBC News a fireball this big is only expected about two or three times every 100 years.
At about noon local time on 18 December, the asteroid barrelled through the atmosphere at a speed of 32km/s, on a steep trajectory of seven degrees.
Measuring several metres in size, the space rock exploded 25.6km above the Earth's surface, with an impact energy of 173 kilotonnes.
"That was 40% the energy release of Chelyabinsk, but it was over the Bering Sea so it didn't have the same type of effect or show up in the news," said Kelly Fast, near-Earth objects observations programme manager at Nasa.
"That's another thing we have in our defence, there's plenty of water on the planet."

[IMG]https://ichef.bbci.co.uk/news/660/cpsprodpb/20EA/production/_106062480_***********-1127790125.jpg[/IMG]
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Old March 20th, 2019, 10:18 AM   #4707
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China’s OneSpace completes rocket assembly ahead of first orbital launch

by Andrew Jones — March 12, 2019

https://spacenews.com/chinas-onespac...rbital-launch/

OneSpace has completed assembly and testing of its OS-M rocket in preparation for a launch at the end of March which, if successful, would make it the first Chinese private rocket firm to reach orbit.

Comprehensive tests on the OS-M1 solid propellant rocket began last week in Xi’an, north China, and the team is now preparing to transport the launch vehicle to the launch site in the northwest of the country, a OneSpace representative told SpaceNews.

Consisting of three solid propellant stages and a liquid propellant fourth stage, the 19-meter-tall, 20 metric ton OS-M1 is capable of carrying a 205-kilogram payload to 300-kilometer low Earth orbit (LEO), and 73 kilograms to 800-kilometer sun-synchronous orbit (SSO), according to OneSpace.

OneSpace and fellow Chinese private rocket company iSpace both launched two suborbital rockets last year, including one each from Jiuquan, one of four national launch sites which are all run by the country’s military.



Jiuquan has been opened to private launch companies as part of a national civil-military integration strategy, and will also host launches of the Kuaizhou commercial launcher series developed by giant state-owned enterprise CASIC.
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Old Yesterday, 07:04 AM   #4708
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RIP another space pioneer



NASA is about to turn off the Kepler spacecraft, and it will drift away

https://arstechnica.com/science/2018...4_XuKsSxukyGf0

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After more than nine years in operation, the Kepler Space Telescope has run out of hydrazine fuel. Mission managers will now send a command to the spacecraft, which is presently trailing Earth in a heliocentric orbit about 150 million kilometers away, to turn off the spacecraft's transmitters. It will be cast adrift into the silent blackness of space.

But though the spacecraft's effective mission will end, it will live on in troves of data that scientists have yet to process. Already, during its lifetime, the spacecraft has found 2,681 confirmed planets and an additional 2,899 candidate planets that require follow-up confirmation from ground-based telescopes. Those numbers were current as of Monday evening.Kepler can safely be counted as one of the most transformative missions that NASA has ever sent into space. Prior to its launch, astronomers knew planets existed around other stars, but their knowledge beyond that was fuzzy. Now, astronomers have a wealth of information. "Because of Kepler, what we think about our place in the universe has changed," Paul Hertz, Astrophysics Division director at NASA Headquarters, said Tuesday during a conference call with reporters.

For example, astronomers now know that many more planets exist in the Milky Way than the billions of stars out there and that these worlds are considerably more diverse than the eight planets in our own Solar System. Astronomers have found everything from small rocky planets to huge Jovian-like worlds. They've also discovered a new class of planets dubbed "Super Earths" that are larger than Earth but smaller than Neptune.
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Old Yesterday, 09:53 AM   #4709
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Self-stabilizing photonic levitation and propulsion of nanostructured macroscopic objects
https://authors.library.caltech.edu/92395/

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Old Today, 12:01 AM   #4710
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Sounds fancy much?
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