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NASA has just released the highest definition image of the Andromeda galaxy, compliments of the Hubble Space Telescope.
It's hard to comprehend just how many stars are cotained in Andromeda, but this image is so detailed if you zoom in, many individual stars packed tightly together (in reality any two are actually light years apart) can actually be resolved. Awesome.
www.nasa.gov/sites/default/files ... es_jpg.jpg |
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NASA has just released the highest definition image of the Andromeda galaxy, compliments of the Hubble Space Telescope.
It's hard to comprehend just how many stars are cotained in Andromeda, but this image is so detailed if you zoom in, many individual stars packed tightly together (in reality any two are actually light years apart) can actually be resolved. Awesome.
www.nasa.gov/sites/default/files ... es_jpg.jpg | |
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We have another development.
[url=http://phys.org/news/2015-02-big-quantum-equation-universe.htmlNo Big Bang? Quantum equation predicts universe has no beginning[/url.
It does seem more logical to believe the universe has been around forever and will continue to be doesn't it rather than a bang. The latter has never sat happy with me.
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We have another development.
[url=http://phys.org/news/2015-02-big-quantum-equation-universe.htmlNo Big Bang? Quantum equation predicts universe has no beginning[/url.
It does seem more logical to believe the universe has been around forever and will continue to be doesn't it rather than a bang. The latter has never sat happy with me.
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Quote ="Ferocious Aardvark"NASA has just released the highest definition image of the Andromeda galaxy, compliments of the Hubble Space Telescope.
It's hard to comprehend just how many stars are cotained in Andromeda, but this image is so detailed if you zoom in, many individual stars packed tightly together (in reality any two are actually light years apart) can actually be resolved. Awesome.
www.nasa.gov/sites/default/files ... es_jpg.jpg'"
Breathtaking that mate. I would love to be able to comprehend that or even see it with my own eyes. Thanks. |
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Quote ="Ferocious Aardvark"NASA has just released the highest definition image of the Andromeda galaxy, compliments of the Hubble Space Telescope.
It's hard to comprehend just how many stars are cotained in Andromeda, but this image is so detailed if you zoom in, many individual stars packed tightly together (in reality any two are actually light years apart) can actually be resolved. Awesome.
www.nasa.gov/sites/default/files ... es_jpg.jpg'"
Breathtaking that mate. I would love to be able to comprehend that or even see it with my own eyes. Thanks. | |
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| Quote ="McClennan"Breathtaking that mate. I would love to be able to comprehend that or even see it with my own eyes. Thanks.'"
Just a random muse I had.
Our own Sun converts 700 million tons of hydrogen into 695 million tons of helium every second. (The remainder escapes as pure energy. Of which only about one-billionth reaches Earth, and a third of that gets reflected).
Andromeda contains at minimum a trillion stars, i.e. 10 [size=5012[/size
If on average they burn same as our own Sun then when you look at that faint fuzzy patch which is Andromeda you are watching 70,000,000,000,000,000,000 tons of hydrogen being spent every second.
But that's only double the amount in our own Milky Way galaxy. Which to put it in perspective, if Andromeda was twice the size of a RL ball, and the Milky Way was same size as a RL ball, they would be only about 20 ball-lengths apart.
Andromeda is heading our way at something like 80 miles per second but will take 4.5 billion years to collide. The view as it approaches will be stunning.
And the Milky Way's the daddy, as it contains more dark matter than Andromeda, making us more massive, so there! |
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Someone told me all the Hubble pictures are in black and white and the colour is added later by NASA using their interpretations of what is being viewed. Is that right?
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Quote ="Bullseye"Someone told me all the Hubble pictures are in black and white and the colour is added later by NASA using their interpretations of what is being viewed. Is that right?'"
Yes and no. Hubble doesn't have a "colour camera", all images are taken in grayscale.
Many images are published showing either false, or partly false colours (compared to what you might see with your own peepers if you could) but never without explaining what has been done, and usually to illustrate specific things.
However, Hubble can and does produce amazing "natural colour" images. The basic way to do this is to take images through red, green and blue filters. Then combine the results. So the shot through the red filter only lets through the red part of the visible light spectrum; so you know that that image is actually just the shades of red; same for green, same for blue. Combine them and hey presto, full colour!
hubblesite.org/gallery/behind_th ... /index.php
As for "interpretation", it's all a question of degree. For example, a picture of the Crab nebula may look lovely and colourful, and the light and colours recorded are genuine and "real". Yet you would never experience it like that, as the image is compressed light that actually may have taken a powerful telescope hours to gather. If you were in space looking at it, it would be extremely faint and not very colourful at all.
To qualify the basic answer, Hubble has various cameras including the Wide Field Camera 3 (WFC3) which sees near-ultraviolet, visible and near-infrared; the Cosmic Origins Spectrograph (COS), a spectrograph that sees exclusively in ultraviolet light; the Space Telescope Imaging Spectrograph (STIS), a spectrograph that sees ultraviolet, visible and near-infrared light; and the Near Infrared Camera and Multi-Object Spectrometer (NICMOS) which essentially sees heat not light, if I can put it that way (it's all just different parts of the spectrum). As you can see, an infrared image HAS to be given "false colours" since we can't see infrared, or much UV, and so they have to interpret these images into visible light images so we have an impression of what Hubble sees. Same for images from X-ray telescopes, or Radio telescopes. |
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Quote ="Bullseye"Someone told me all the Hubble pictures are in black and white and the colour is added later by NASA using their interpretations of what is being viewed. Is that right?'"
Yes and no. Hubble doesn't have a "colour camera", all images are taken in grayscale.
Many images are published showing either false, or partly false colours (compared to what you might see with your own peepers if you could) but never without explaining what has been done, and usually to illustrate specific things.
However, Hubble can and does produce amazing "natural colour" images. The basic way to do this is to take images through red, green and blue filters. Then combine the results. So the shot through the red filter only lets through the red part of the visible light spectrum; so you know that that image is actually just the shades of red; same for green, same for blue. Combine them and hey presto, full colour!
hubblesite.org/gallery/behind_th ... /index.php
As for "interpretation", it's all a question of degree. For example, a picture of the Crab nebula may look lovely and colourful, and the light and colours recorded are genuine and "real". Yet you would never experience it like that, as the image is compressed light that actually may have taken a powerful telescope hours to gather. If you were in space looking at it, it would be extremely faint and not very colourful at all.
To qualify the basic answer, Hubble has various cameras including the Wide Field Camera 3 (WFC3) which sees near-ultraviolet, visible and near-infrared; the Cosmic Origins Spectrograph (COS), a spectrograph that sees exclusively in ultraviolet light; the Space Telescope Imaging Spectrograph (STIS), a spectrograph that sees ultraviolet, visible and near-infrared light; and the Near Infrared Camera and Multi-Object Spectrometer (NICMOS) which essentially sees heat not light, if I can put it that way (it's all just different parts of the spectrum). As you can see, an infrared image HAS to be given "false colours" since we can't see infrared, or much UV, and so they have to interpret these images into visible light images so we have an impression of what Hubble sees. Same for images from X-ray telescopes, or Radio telescopes. | |
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Just to keep the daily wail supporters on the edge of their paranoia.
The optics, sensors, resolution of Hubble are now , in digital terms, obsolete. Think about what Google earth can show you, and that is pretty low grade stuff to what the current satellites looking at the earth can see.
Just imagine what you thought was fun when looking at your house and then think about what can actually be seen.
Sleep tight.
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| Quote ="Leaguefan"
The optics, sensors, resolution of Hubble are now , in digital terms, obsolete. Think about what Google earth can show you, and that is pretty low grade stuff to what the current satellites looking at the earth can see.
'"
Hubble has some equipment 20 years old although a couple of cameras were installed just a few years back, but yes, obsolete in terms of what equivalent stuff could be built in two decades on, certainly NO in terms of what Hubble can do and see. Which is why it remains heavily oversubscribed.
Plus, Hubble doesn't suffer from atmospheric interference so apart from turbulence (which corrective optics can improve, but only for narrow fields of view) it has truly dark skies, compared with anywhere on Earth.
Plus, Much of the spectrum simply doesn't make it through the atmosphere so space-based cameras will always remain the only option for that task.
Oh - and there's no comparison at all with Earth mapping satellites - They are seeing objects at 500 miles or so. Hubble is seeing 13+ billion light years.
Finally can I assure Wail readers that if the authorities wanted to spy on your house, they would probably get better resolution images from a nearby parked van. They don't actually want to see your roof. They are after YOU and the views through your windows. |
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| Roundabout now, the Dawn spacecraft should just be entering an orbit around the asteroid, or dwarf planet, Ceres. Dawn was launched in 2007 and has an ion drive propulsion system. Over the next few months they will get the orbit down to a height of only a couple of hundred miles, but here is a view it took recently from around 29,000 miles. Incidentally they have no idea what the bright spots are, I am assuming it is the portal to the aliens' underground city.
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Pfft. My niece goes faster than that when she hears the ice cream van. |
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Pfft. My niece goes faster than that when she hears the ice cream van. | |
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More pics of Ceres
"Dawn scientists can now conclude that the intense brightness of the mysterious spots on ‪#‎ceres‬ is due to the reflection of sunlight by highly reflective material on the surface, possibly ice," Christopher Russell, principal investigator for the Dawn mission, said recently.
dawn.jpl.nasa.gov/multimedia/ima ... ew&start=0 |
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More pics of Ceres
"Dawn scientists can now conclude that the intense brightness of the mysterious spots on ‪#‎ceres‬ is due to the reflection of sunlight by highly reflective material on the surface, possibly ice," Christopher Russell, principal investigator for the Dawn mission, said recently.
dawn.jpl.nasa.gov/multimedia/ima ... ew&start=0 | |
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It's as I thought. There is no such thing as reality. If you have a bit of spare time to digest a thought-provoking proof, then get your thinking gear around this analysis of what happens to you if you fall into a massive black hole
www.bbc.com/earth/story/20150525 ... -clone-you |
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It's as I thought. There is no such thing as reality. If you have a bit of spare time to digest a thought-provoking proof, then get your thinking gear around this analysis of what happens to you if you fall into a massive black hole
www.bbc.com/earth/story/20150525 ... -clone-you | |
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Low in the west at sunset all week, Jupiter and Venus heading for each other. Closest on 30th, when they will appear to be almost touching. That should create a busy night on the 999 switchboards
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| New Horizons will fly by Pluto around 1pm Tuesday 14 July - although probably the images won't be beamed back until 15th.
Here's the view from 3.7 million miles (July 8th)
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What does the surface of a comet look like from a height of 9 metres?
Astonishing images from the Philae lander riding along on Comet 67P/Churyumov–Gerasimenko as it closes in on the Sun.
And here is an animation of the Philae lander's view as it closed in to land on the comet:
www.esa.int/spaceinimages/Images ... to_a_comet |
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What does the surface of a comet look like from a height of 9 metres?
Astonishing images from the Philae lander riding along on Comet 67P/Churyumov–Gerasimenko as it closes in on the Sun.
And here is an animation of the Philae lander's view as it closed in to land on the comet:
www.esa.int/spaceinimages/Images ... to_a_comet | |
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| OK i get that the world has become massively dumbed down, and I get that social media has instantly provided a voice for nutters, befuddled and fanatics, but what i don't get is how easily even dumbed down folk swallow the bull. On 28 September a total eclipse of the moon will occur, not a rare evnt, but lovely and interesting to watch. Er, that's it. Except on FB, Twitter, YT etc there is a tide of morons posting apocalyptic shoite about Armageddon, raptures, end times, and most idiotic of all a huge asteroid. Apart from the religious nutjobs, I assume that everyone else starts these things as a wind-up. But it has even reached the stage where sober organisations such as NASA are asked to respond with debunks of this arrant nonsense. (To which the standard response is "well they would say that"icon_wink.gif
I mean, how many times in recent years have the nutters and shysters predicted apocalypses and similar. Doesn't this make the penny drop even through the thickest, densest skull? FFS.
What on earth is the matter with people?   |
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Life on Mars?
"NASA will detail a major science finding from the agency's ongoing exploration of Mars during a news briefing at 11:30 a.m. EDT on Monday, Sept. 28 at the James Webb Auditorium at NASA Headquarters in Washington.
"The event will be broadcast live on NASA Television and the agency's website."
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| Quote ="Ferocious Aardvark"OK i get that the world has become massively dumbed down, and I get that social media has instantly provided a voice for nutters, befuddled and fanatics, but what i don't get is how easily even dumbed down folk swallow the bull. On 28 September a total eclipse of the moon will occur, not a rare evnt, but lovely and interesting to watch. Er, that's it. Except on FB, Twitter, YT etc there is a tide of morons posting apocalyptic shoite about Armageddon, raptures, end times, and most idiotic of all a huge asteroid. Apart from the religious nutjobs, I assume that everyone else starts these things as a wind-up. But it has even reached the stage where sober organisations such as NASA are asked to respond with debunks of this arrant nonsense. (To which the standard response is "well they would say that"icon_wink.gif
I mean, how many times in recent years have the nutters and shysters predicted apocalypses and similar. Doesn't this make the penny drop even through the thickest, densest skull? FFS.
What on earth is the matter with people?
'"
Count yourself lucky, we've got a flat earth loony blocking our boards up at the moment. One of those conspiracy nuts who will believe anything as long as it's not the boring truth... |
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Crackabongo.
How old do you think the Earth is?
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