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Space and Astronomy Thread |
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#3201 |
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Join Date: Aug 2005
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And of course a star that will outlive the sun, otherwise it's a bit pointless.
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#3202 |
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Join Date: Jun 2012
Location: Newport Pagnell
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The sun may be going supernova in about 5,000,000,000 years time from now but the Earth will be long gone as we know it long before then. It's estimated that in just 20% of that time in the future, a billion years from now the earth will have become the same as Venus is right now. Global warming, you ain't seen nothing yet and it's not going to be manmade that's a cert.
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#3203 |
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Join Date: Nov 2008
Location: London
Posts: 4,020
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The sun isn't big enough to go supernova, just red giant and collapse to white dwarf.
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#3204 |
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Join Date: Aug 2012
Posts: 16,124
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https://www.youtube.com/watch?v=fVMgnmi2D1w
I am sure someone will have posted this here already but just in case. Absolutely stunning. |
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#3205 |
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Join Date: Jun 2012
Location: Newport Pagnell
Posts: 21,349
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The sun isn't big enough to go supernova, just red giant and collapse to white dwarf.
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#3206 |
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Join Date: Dec 2005
Location: In a jar, on a shelf
Posts: 31,671
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By the time someone reaches their 18th birthday, they'll have travelled over 10.5bn miles. Yet still want a car. And don't try to claim mileage from HMRC, or say 'oh, about 30km/s' when an officer asks how fast you were going.
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#3207 |
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Forum Member
Join Date: Dec 2004
Posts: 21,645
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Quote:
The sun may be going supernova in about 5,000,000,000 years time from now but the Earth will be long gone as we know it long before then. It's estimated that in just 20% of that time in the future, a billion years from now the earth will have become the same as Venus is right now. Global warming, you ain't seen nothing yet and it's not going to be manmade that's a cert.
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#3208 |
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Join Date: Feb 2014
Location: The Sixth Circle of Hell
Posts: 20,174
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Yes, of course, thanks for reminding me.
![]() http://www.bbc.co.uk/programmes/b077nl9f Truly fantastic new images of Ceres, after almost 40 years a plausible scientific explanation for the enigmatic alien 'Wow!' signal and finally - will scientists ever prove that the Multiverse is real? http://phys.org/news/2016-04-ceres-i...t-craters.html https://www.theguardian.com/science/...e_b-gdnscience http://www.smithsonianmag.com/scienc...eal-180958813/ |
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#3209 |
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Join Date: Nov 2008
Location: London
Posts: 4,020
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Horizon discussed this very topic recently.
![]() http://www.bbc.co.uk/programmes/b077nl9f Truly fantastic new images of Ceres, after almost 40 years a plausible scientific explanation for the enigmatic alien 'Wow!' signal |
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#3210 |
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Join Date: Feb 2014
Location: The Sixth Circle of Hell
Posts: 20,174
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But why does he need to wait until the comet passes the same spot? Surely the signal would be continuous.
![]() https://www.newscientist.com/article...ts-not-aliens/ |
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#3211 |
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Forum Member
Join Date: May 2004
Location: Storbritannia
Posts: 28,916
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I only have one thing to post tonight; moonset (Phobos) on Mars: http://planetary.s3.amazonaws.com/as...22012938_o.png
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#3212 |
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Join Date: Feb 2014
Location: The Sixth Circle of Hell
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Can life exist in the blackest, coldest vacuum of interstellar space?
http://www.bbc.com/earth/story/20160...of-outer-space A small dark moon has been discovered orbiting around the distant dwarf planet Makemake in the Kuiper Belt. http://phenomena.nationalgeographic....-solar-system/ http://phys.org/news/2016-04-hubble-...rf-planet.html The Cassini probe is continuing to explore the mysterious methane seas on Titan. http://phys.org/news/2016-04-cassini...sea-titan.html |
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#3213 |
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Join Date: May 2004
Location: Storbritannia
Posts: 28,916
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A small dark moon has been discovered orbiting around the distant dwarf planet Makemake in the Kuiper Belt.
http://phenomena.nationalgeographic....-solar-system/ http://phys.org/news/2016-04-hubble-...rf-planet.html In other news: Revealed for the first time in all its glory - the main mirror of the James Webb Space Telescope, which will be launched in 2018. JWST is regarded as the successor to Hubble, and will carry technologies capable of detecting the light from the first stars to shine in the Universe. I vehemently oppose that telescope's description as the successor to Hubble - it isn't, not least because it's meant to observe in the long wavelength (orange-red) visible light spectrum through to infrared wavelengths. Back in 2012, NASA received a donation of two space telescopes from the United States National Reconnaissance Office. It looks like one of those will be used for the Wide Field Infrared Survey Telescope project but I'd like to see the other one used as a visible wavelength replacement for the Hubble Space Telescope. |
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#3214 |
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Forum Member
Join Date: Feb 2014
Location: The Sixth Circle of Hell
Posts: 20,174
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Interestingly, Makemake could have theoretically been discovered by Clyde Tombaugh in his search for trans-Neptunian planets because it would have been detectable by the Earth-based telescopes of that time. In terms of composition, spectroscopy can be used to determine what compounds are present on far away Makemake and other similar bodies: http://web.gps.caltech.edu/~mbrown/out/kbcomp.pdf
In other news: Revealed for the first time in all its glory - the main mirror of the James Webb Space Telescope, which will be launched in 2018. JWST is regarded as the successor to Hubble, and will carry technologies capable of detecting the light from the first stars to shine in the Universe. I vehemently oppose that telescope's description as the successor to Hubble - it isn't, not least because it's meant to observe in the long wavelength (orange-red) visible light spectrum through to infrared wavelengths. Back in 2012, NASA received a donation of two space telescopes from the United States National Reconnaissance Office. It looks like one of those will be used for the Wide Field Infrared Survey Telescope project but I'd like to see the other one used as a visible wavelength replacement for the Hubble Space Telescope. ![]() The search for rogue planets. http://news.discovery.com/space/alie...-on-160427.htm |
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#3217 |
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Join Date: Mar 2004
Posts: 1,037
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True enough. But long before solar luminosity has increased sufficiently to cause a runaway greenhouse effect by boiling off the oceans, CO2 levels will have dropped below the levels required to sustain photosynthesis. So game over for most life on the planet.
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#3218 |
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Join Date: Jun 2012
Location: Newport Pagnell
Posts: 21,349
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If it's there the JWT will find it.
![]() A lost sighting of the brightest supernova in recorded history has been discovered in an ancient text and a new modified form of the famous Drake Equation. http://news.nationalgeographic.com/2...rab-astronomy/ http://phys.org/news/2016-04-limits-uniqueness.html
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#3219 |
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Join Date: Feb 2014
Location: The Sixth Circle of Hell
Posts: 20,174
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Really enjoyed reading these KS.
![]() ![]() The highest resolution global map of Pluto so far, three earth sized exoplanets orbiting a 'nearby' tiny ultracool star and a rocky, tailless comet that may be a chunk left over from the very origins of the solar system. http://phys.org/news/2016-05-scienti...omprising.html http://news.nationalgeographic.com/2...rf-star-space/ http://phys.org/news/2016-05-years-e...host-life.html http://www.livescience.com/54614-wei...discovery.html |
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#3221 |
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Join Date: Feb 2014
Location: The Sixth Circle of Hell
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Ground breaking images of Zeta Andromeda - by the using cutting-edge technique interferometry astronomers have shown the surface of a star 181 light years away - simply incredible!
![]() http://phys.org/news/2016-05-ground-...r-insight.html http://cdn.phys.org/newman/csz/news/...arwithdiff.jpg |
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#3222 |
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Join Date: Feb 2014
Location: The Sixth Circle of Hell
Posts: 20,174
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#3223 |
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Join Date: May 2004
Location: Storbritannia
Posts: 28,916
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Quote:
Ground breaking images of Zeta Andromeda - by the using cutting-edge technique interferometry astronomers have shown the surface of a star 181 light years away - simply incredible!
![]() http://phys.org/news/2016-05-ground-...r-insight.html http://cdn.phys.org/newman/csz/news/...arwithdiff.jpg ![]() In other news: Mysterious tracks on Mars may be formed by boiling water, study shows. Water seeping to the surface during the Martian summer might boil so violently it blasts dust off the ground, helping to explain the size of the streaks. Scientists Have Figured Out What Caused The "Alien Radio Signal" Coming From A Distant Exoplanet...Based on a series of mathematical calculations, the most likely culprit behind the somewhat weak radio signal was a planet-wide lightning storm. |
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#3224 |
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Join Date: Apr 2005
Location: Nottingham, UK
Posts: 11,878
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SpaceX have had another successful launch, and another successful sea landing. This landing was much more difficult than the previous one because the satellite was going to geostationary transfer orbit, meaning the first stage was travelling much faster and had less fuel left over to decelerate with. They needed to use all 3 engines rather than 1. (The Falcon 9 first stage has 9 engines but only 3 are gimbled for manoeuvring during landing.)
Technical broadcast: https://www.youtube.com/watch?v=1lYZLxr3L4E Hosted broadcast: https://www.youtube.com/watch?v=L0bMeDj76ig Not so much to see because it was dark, and there was chase plane footage. |
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#3225 |
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Join Date: Nov 2008
Location: London
Posts: 4,020
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