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Watch the Crab Nebula Expand Over a 13 Year Period
The Bad Astronomer writes "A thousand years ago, the light from the explosion of a massive star reached the Earth. We now call this supernova remnant the Crab Nebula, and a new image of the Crab taken by astronomer Adam Block shows the physical expansion of the debris, made obvious in a short video comparing his 2012 observations with some taken in 1999. The outward motion of filaments and knots in the material can be easily traced even over this relatively short time baseline."
LAME!!! just 2 exposures alternating back and forth.
Craaaaaaab people! Craaaaaaaab people! Craaaaaab people!
The newer one picks up more of the blue, so it looks larger. If you watch the red, it is definitely moving outward. Will have to use this the next time I teach about nebula.
2.43759728 × 10^-9 FPS should be enough for anybody.
See my journal for slashdot ID's by year. Mine created in 2005. http://slashdot.org/journal/289875/slashdot-ids-by-year
Plus the biggest changes seem to be in the colors not the growth which might be related to the fact it was taken by two different telescopes....
Technology, the cause of and solution to all of life's problems.
The Crab Nebula exploded in 1054; well, 6500 years earlier, to be pedantic. But the light arrived to Earth in 1054. So what else happened in 1054? Oh yeah, the great Schism (http://en.wikipedia.org/wiki/East%E2%80%93West_Schism#Mutual_excommunication_of_1054).
Funny coincidence...
...gis sdrawkcab (usually not responding to ACs; don't bother posting as AC)
The second "larger" image was processed differently - more lightening of the dark end & over exposed. All the stars bloom in the new image as they've been enhanced stronger than the older image. Granted the internal filaments did move slightly, there is cheating to make it look more pronounced.
from 09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0
to 45 2F 6E 40 3C DF 10 71 4E 41 DF AA 25 7D 31 3F
We should all take this time to remember the brave folks who, thousands of years ago, had to self destruct their crab-class starship to save the universe from the Daleks.
This was first done in 1921
http://www.pnas.org/content/7/6/179.full.pdf+html
True, they didn't have animated gifs back then...
Ignore the parts that are differently visible and the color differences, and focus on the parts that are the same in both images.
You'll see that the elements from the earlier photo have moved away from the center of the nebula and this is visible relative to all the background stars.
G.
Off topic but I really am annoyed with the hack web "programmers" that build web sites with a dozen or more cross site scripts. Here's the shit list from this latest atrocity:
facebook.com
google.com
google-analytics.com
outbrain.com
parsley.com
chartbeat.com
criteo.com
vimeo.com
twitter.com
washingtonpost.com
revsci.net
adsonar.com
cleanprint.com
wapolabs.com
grvcdn.com
echoenabled.com
content.ad
googleapis.com
amazon-adsystem.com
visualrevenue.com
vimeocdn.com
slate.com
That's 21 external javascript sites. There are probably more that would be pulled in if I enabled all these sites in NoScript. This is seriously pathetic.
I am becoming gerund, destroyer of verbs.
Why the misinformation?! The background stars don't move, the nebula expands, the color is irrelevant. Watch it in black and white if you must.
A successful API design takes a mixture of software design and pedagogy.
I have heard it suggested that when Messier was compiling his list of things not to look at because they're not comets, the Crab Nebula was prominently in his list because it was significantly smaller and brighter in his day than it is now. It's far from conspicuous today...
...laura