Joined: Feb 17 2002 Posts: 28357 Location: MACS0647-JD
Pluto's icy plains - truly astonishing detail, the resolution is around 80 metres per pixel This is a screengrab of a partial image, but for the best view go to the page and click on the full length image and scroll. Awesome.
Pluto's icy plains - truly astonishing detail, the resolution is around 80 metres per pixel This is a screengrab of a partial image, but for the best view go to the page and click on the full length image and scroll. Awesome.
Joined: Feb 17 2002 Posts: 28357 Location: MACS0647-JD
Unveiled today, this is the Crew Module pressure vessel of the Orion spacecraft, a key component now being tested.
Orion is scheduled to be launched in 2018, and will go on an unmanned proving mission that will fly thousands of miles beyond the Moon and back, in a 3 week mission.
Before then, over the next two years there are over 100,000 components to be installed, and that's just in this bit. Over many years, the scientists are of course considering every conceivable issue, testing meticulously and developing/improving as they go along. Like their Apollo predecessors, the spaceflights will only be the final part after many years of exhaustive development and by then the scientists will have considered and planned for a million eventualities, tested them all, and built the final craft and written procedures accordingly.
Orion's first manned flight might be as soon as 2012, though budget cuts are the problem, but sooner or later this is the system that will send men to Mars.
As part of the process, a new launch system is also being developed. Sadly gravity continues to be a pest, but the new SLS (Space Launch System) is also well under development, this will be by some margin the world’s most powerful rocket, and will launch Orion on missions to an asteroid and eventually to Mars, being able to provide enough fuel to allow deep space (well, by solar system standards, that is) travel for bigger craft, and life support for astronauts on long journeys. I have been to see Space Shuttle launches, but hope to travel to see SLS go up as it will be just an awesome sight and sound. I'd recommend watching a live launch to anyone.
Last edited by Ferocious Aardvark on stardate Jun 26, 3013 11:27 am, edited 48,562,867,458,300,023 times in total
"This historic signal was produced by a pair of black holes roughly 1.3 billion light years away, one 29 times the mass of the sun and the other 36 times, orbiting each other and then merging into a single black hole. “The closer they get, the faster they spin.” Near the end, they were whirling so fast that each orbit lasted just a few milliseconds.
"When they eventually merged, the single black hole that remained was 62 times the mass of the sun – three solar masses lighter than the two original black holes combined. That missing mass all went into creating gravitational waves that fluttered space-time like a sheet.
“The total power output of gravitational waves during the brief collision was 50 times greater than all of the power put out by all the of the stars in the universe put together,” You can actually hear a recording of the sound of the gravitational waves being produced, made by translating the frequency of the gravitational waves into sound waves, via the link on the page
"This historic signal was produced by a pair of black holes roughly 1.3 billion light years away, one 29 times the mass of the sun and the other 36 times, orbiting each other and then merging into a single black hole. “The closer they get, the faster they spin.” Near the end, they were whirling so fast that each orbit lasted just a few milliseconds.
"When they eventually merged, the single black hole that remained was 62 times the mass of the sun – three solar masses lighter than the two original black holes combined. That missing mass all went into creating gravitational waves that fluttered space-time like a sheet.
“The total power output of gravitational waves during the brief collision was 50 times greater than all of the power put out by all the of the stars in the universe put together,” You can actually hear a recording of the sound of the gravitational waves being produced, made by translating the frequency of the gravitational waves into sound waves, via the link on the page
Last edited by Ferocious Aardvark on stardate Jun 26, 3013 11:27 am, edited 48,562,867,458,300,023 times in total
It will really open a new window into what astronomers and physicists can do, measure, and test in the universe. Historic.
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Joined: Oct 26 2005 Posts: 3829 Location: In the seaside town ...that they forgot to bomb
To be honest it’s all above my head.
They’ve picked up this gravitational wave from 1.3 billion light years away. If the Universe is 13.7 billion years old how will they pick up the wave from the Big Bang, won’t it have gone past already? Or is the centre of the Big Bang shedloads further away than this merged black hole?
Thanks, in advance.
In Springfield, they're eating the dogs, the people that came in. They're eating the cats! They're eating the pets!
Joined: Feb 17 2002 Posts: 28357 Location: MACS0647-JD
It's misleading to think of the Big Bang as something that happened far away and the gravitational waves at some later point reach us. All our universe was within the Big Bang singularity and that singularity expanded and continues to expand.
If you think of the expanding universe as the surface of an expanding balloon - which it isn't, but it's not a bad analogy - you can see that radiation doesn't go from the centre "out" and eventually hit a boundary, it travels indefinitely, because the universe is infinite. Think of a wave going round and round a balloon.
We can only see so far back in time using other forms of radiation and our view is obstructed or blocked by intervening matter, but gravitational waves are not affected by matter - they pass straight "through", if you like) so in theory if you can devise good enough detectors, you can see all the way back to the Big Bang itself.
Last edited by Ferocious Aardvark on stardate Jun 26, 3013 11:27 am, edited 48,562,867,458,300,023 times in total
Joined: Oct 26 2005 Posts: 3829 Location: In the seaside town ...that they forgot to bomb
Ferocious Aardvark wrote:It's misleading to think of the Big Bang as something that happened far away and the gravitational waves at some later point reach us. All our universe was within the Big Bang singularity and that singularity expanded and continues to expand.
If you think of the expanding universe as the surface of an expanding balloon - which it isn't, but it's not a bad analogy - you can see that radiation doesn't go from the centre "out" and eventually hit a boundary, it travels indefinitely, because the universe is infinite. Think of a wave going round and round a balloon.
We can only see so far back in time using other forms of radiation and our view is obstructed or blocked by intervening matter, but gravitational waves are not affected by matter - they pass straight "through", if you like) so in theory if you can devise good enough detectors, you can see all the way back to the Big Bang itself.
Thanks for that F.A, I’ll try & divulge it when I’m more lucid.
I’m still struggling with all the Quantum Physics stuff I’ve watched lately, the weirdest one being a parallel universe theory & you're just a figment of my imagination or I am yours.
In Springfield, they're eating the dogs, the people that came in. They're eating the cats! They're eating the pets!
Joined: Feb 17 2002 Posts: 28357 Location: MACS0647-JD
Figment of imagination is maybe a bit too far but it's close. The space you occupy is 99.99999whatever% empty. You're basically a loosely assembled energy field which improbably somehow works. Each atom if enlarged would consist very roughly of a tennis ball sized nucleus, and then the nearest orbiting electron would be maybe speck of dust size, 1km away. Sure, there may be a number of other electrons but basically that's it. And no connections between any of these distant specks. And the nucleus, far from being solid, is really an assembly of various exotic particles whizzing around.
How this astonishingly disorganized assemblage of basically empty space with occasional tiny energy quanta operates as a functioning human (or a daffodil, or a rock) is hard to get your head around but certainly nothing is remotely what it seems. It's why astronomy and philosophy have always been very good partners.
Last edited by Ferocious Aardvark on stardate Jun 26, 3013 11:27 am, edited 48,562,867,458,300,023 times in total
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