how do we know black holes exist
Bookmarked 785 weeks ago
http:deepastronomycom is getting more stuff all the time please remember to check it outit039s a natural question to ask how we know black holes exist if we can039t see them this video step through the history of thinking on the idea of black holes and our first actual observations of onemusic used:robert a wolf:http:bitlyeoxafkcraig sounda brown:http:bitlygx62nd

how would aliens view our solar system
Bookmarked 808 weeks ago
from nasa astrophysics a supercomputer simulation shows how alien astronomers might have seen the formation of our solar system dust ground off icy bodies in the kuiper belt the cold-storage zone that includes pluto and millions of other objects creates a faint infrared disk potentially visible to alien astronomers looking for planets around the sun neptuneamp039s gravitational imprint on the dust is always detectable in new simulations of how this dust moves through the solar system by ramping up the collision rate the simulations show how the distant view of the solar system might have changed over its history

atlas of creation
Bookmarked 788 weeks ago
astronomer mike merrifield - a regular on our other channel sixtysymbols - responds to youtubers039 comments about a book on his shelf

spitzer space telsecope sees light from 55 cancri e 720p 3d converted
Bookmarked 723 weeks ago
nasa039s spitzer space telescope was able to detect a super earth039s direct light for the first time using its sensitive heat-seeking infrared vision super earths are more massive than earth but lighter than gas giants like neptune as this artist039s concept shows in visible light a planet is lost in the glare of its star top view when viewed in infrared the planet becomes brighter relative to its star this is largely due to the fact that the planet039s scorching heat blazes with infrared light even on our own bodies emanate more infrared light than visible due to our heatcredit: nasajpl-caltechsource: http:wwwjplnasagovnewsnewscfmrelease=2012-127

nasa sdo - venus approaching in 191 anstrom
Bookmarked 719 weeks ago
this channel highlights the outer atmosphere of the sun -- called the corona -- as well as hot flare plasma hot active regions solar flares and coronal mass ejections will appear bright here the dark areas -- called coronal holes -- are places where very little radiation is emitted yet are the main source of solar wind particlescredit: nasa sdo

sun - solar activity nov 24 2020 - youtube
Bookmarked 273 weeks ago
new active region has came into our view from earthtwo massive sunspots with the larger at almost 3 times the size of the earththis is approx 2 hour time-

naked eye observations: crash course astronomy 2
Bookmarked 582 weeks ago
today on crash course astronomy phil invites you to head outside and take a look at all the incredible things you can see with your naked eye--table of contents:naked eye observations 0:284constellations 3:097the color of stars 2:445view of the stars 7:25--pbs digital studios: http:youtubecompbsdigitalstudiosfollow phil on twitter: https:twittercombadastronomerwant to find crash course elsewhere on the internetfacebook - http:wwwfacebookcomyoutubecrashcoursetwitter - http:wwwtwittercomthecrashcoursetumblr - http:thecrashcoursetumblrcom support crashcourse on subbable: http:subbablecomcrashcourse--photoshttp:wwwesoorgpublicimagespotw1333ahttp:commonswikimediaorgwikifile:3_solar_interstellar_neighborhood_elitupnghttp:wwwspacetelescopeorgimagesheic0206jhttp:wwwspacetelescopeorgimagesheic0720chttp:uploadwikimediaorgwikipediacommons336orion_tjtjpghttp:hubblesiteorgnewscenterarchivereleases199604http:enwikipediaorgwikidelphinusmediaviewerfile:delphinus_iausvghttp:enwikipediaorgwikiscorpiusmediaviewerfile:sidney_hall_-_urania27s_mirror_-_scorpiojpghttp:enwikipediaorgwikicategory:pisces_constellationmediaviewerfile:pisces_constellation_mappnghttp:enwikipediaorgwikialpha_cancrimediaviewerfile:cancer_constellation_mappnghttp:enwikipediaorgwikiglobe_at_nightmediaviewerfile:light_pollution_it27s_not_prettyjpghttp:solarsystemnasagovmultimediadisplaycfmim_id=7543http:photojournaljplnasagovcatalogpia00104http:wwwesaintspaceinimagesimages200702true-colour_image_of_mars_seen_by_osirishttp:photojournaljplnasagovjpegpia04866jpghttp:photojournaljplnasagovcatalogpia06193http:commonswikimediaorgwikifile:star_trails_over_the_vlt_in_paranaljpghttp:imgsrchubblesiteorghudbimageshs-2006-02-a-printjpghttp:enwikipediaorgwikicircumpolar_starmediaviewerfile:circumpolar_az81jpg

lego antikythera mechanism
Bookmarked 796 weeks ago
the antikythera mechanism: http:bitlyfm4ofk is the oldest known scientific computer built in greece at around 100 bce lost for 2000 years it was recovered from a shipwreck in 1901 but not until a century later was its purpose understood: an astronomical clock that determines the positions of celestial bodies with extraordinary precision in 2010 we built a fully-functional replica out of lego sponsored by digital science: http:wwwdigital-sciencecom a new division of macmillan publishers that provides technology solutions for researchers available under a cc-by-30-unported license

dawn039s approach to vesta
Bookmarked 749 weeks ago
this movie and set of still pictures show images obtained by nasa039s dawn spacecraft on its approach to the protoplanet vesta and a comparison of views from dawn039s framing camera and nasa039s hubble space telescopethe first part of the video shows nine sets of images obtained for navigation purposes by dawn039s framing camera each set includes 20 frames each of the first five sets covers 30 minutes in duration each of the last four sets covers 60 minutes in duration the first set was taken on may 3 2011 the start of the spacecraft039s approach to vesta the other sets were obtained on may 10 may 17 may 24 june 1 june 8 june 14 june 17 and june 20 2011in the second part of the video images from dawn appear on the left and images from hubble appear on the right dawn039s images of vesta are a little more than twice as sharp as hubble039s images from hubble which is in orbit around the earth were obtained on may 14 and 16 2007 when vesta was 109 million miles 176 million kilometers away from earth dawn039s images were taken on june 20 2011 when dawn was about 117000 miles 189000 kilometers away from vesta one still image shows dawn039s view of vesta from june 20 2011 when the approaching spacecraft was about 117000 miles 189000 kilometers away from the bodythe other still image shows a comparison of views of vesta obtained by dawn left and hubble right the image from dawn is a little more than twice as sharp as the image from hubble the image from hubble which is in orbit around the earth was obtained on may 14 2007 when vesta was 109 million miles 176 million kilometers away from earth vesta is the second-most massive object in the main asteroid belt vesta is expected to capture the spacecraft into its orbit on july 16 official science gathering begins in early augustthe dawn mission is managed by nasa039s jet propulsion laboratory in pasadena calif for the agency039s science mission directorate in washington dawn is a project of the directorate039s discovery program managed by nasa039s marshall space flight center in huntsville ala ucla is responsible for overall dawn mission science orbital sciences corp of dulles va designed and built the dawn spacecraft the framing cameras were developed and built under the leadership of the max planck institute for solar system research in katlenburg-lindau germany the german aerospace center dlr institute of planetary research in berlin made significant contributions in coordination with the institute of computer and communication network engineering in braunschweig the framing camera project is funded by the max planck society dlr and nasa jpl is a division of the california institute of technology in pasadena for more information about dawn visit: http:wwwnasagovdawncredit: nasajpl-caltechuclampsdlrpsi and nasaesastscium

timescapes: rapture
Bookmarked 803 weeks ago
this is production footage i shot over the summer for my debut film quottimescapesquot a modern portrait of the american southwest i used canon and red mx camerasltbr gtltbr gtfollow the production of the film at: http:twittercomtimescapesltbr gtltbr gtalso here: http:timescapesorg and here http:timescapesorgblogltbr gtltbr gta huge thank you to my assistantsassociate producers who helped me film this dustin kukuk http:twittercomdrkanab nilo recalde http:twittercomnilomr and chris m http:twittercomvisceralway and as always my most sincere and humble respect goes to ron fricke mark magidson terrence malick and godfrey reggioltbr gtltbr gtthank you to my sponsors: canon usa kessler crane camblock vinten amp kataltbr gtltbr gtmusic by nigel quotjohnquot stanford: http:johnstanfordmusiccom make sure to turn the volume and bass way up

keck in motion
Bookmarked 735 weeks ago
keck observatory operates two ten-meter telescopes atop the summit of mauna kea hawai039i keeping those telescopes on-sky every night is the summit crew of the operations department this video is dedicated to the guys of the keck daycrew who make it possiblethe video is a combination of two techniques many scenes were filmed as standard video then accelerated during editing to allow the motion to become clear examples of this are scenes of telescopes slewing and the interferometer delay lines movingslower subjects such as clouds or the stars moving across the sky were photographed as time lapse here a large number of still images were taken these are then processed and converted to video using photoshop cs5 before loading into the video editing software adobe premiere elements to construct the time lapse sequences sometimes required thousands of separate images quickly filling memory cards and exhausting batteries after dark it is long exposure time lapse that is used with individual exposures often 15 seconds to one minute longmany of the nighttime scenes are lit by moonlight this allowed good exposures while still capturing the telescopes with stars overhead a moonlit exposure of 30 to 60seconds can often appear as if taken during the day with the odd effect of having stars in a blue skya number of cameras were used in capturing the imagery a canon g11 canon 20da canon 40d canon 60d and canon 5d mkii were used for various scenes this often involved cameras setup on tripods while programmed to take exposures for hours at a timei must give credit to many folks who helped get the shots giving suggestions driving the telescope avoiding extension cords and generally putting up with cameras deployed to odd locations three scenes were photographed by fellow keck engineer and photographer mark devenot specifically the optic handling scenes mark also made a number of useful suggestions that resulted in other scenes and improvements to the videoscene guide0:00 liz chock performing her usual software magic from her office at headquarters canon 60d0:12 the background is an ethernet switch in the keck 2 computer room the insets are a vxworks boot script the power light for the keck 2 drive system and the keck 1 hbs oil pressure gauges coming up to operational pressure canon 60d0:17 the keck 2 telescope slewing 180 in azimuth video at 10x real time canon 60d0:23 the interferometer fts corner cubes moving into beam canon 60d0:26 a pencil beam shutter dropping into place used to create a narrow laser beam for aligning interferometer optics canon 60d0:28 interferometer fast delay lines moving along the tracks video at 7x real time canon 60d0:34 the keck 2 telescope slewing at 7x real time canon 60d0:39 the interferometer long delay lines moving at 10x real time canopn 60d0:44 another shot of the interferometer fast delay lines at 6x real time canon 60d0:50 the keck 2 telescope slewing at 10x real time canon 60d0:55 cnc milling of a spectrograph slitmask 11x real time canon 60d 1:01 cold vapor issuing from the liquid nitrogen dewar of fatcat secondary 075x real time canon 60d1:06 clouds flowing behing the keck telescopes one frame every 5 seconds canon g111:12 david lynn rodney eisenhour and grant hill removing the esi spectrograph from keck 2 time lapse with one frame every two seconds canon g111:21 ray nyberg and joe gargiulo installing the lris spectrograph into keck 1 one frame every two seconds canon g111:28 george wall and steve doyle stripping the old aluminum coating from a tertiary mirror in preparation for re-coating photography by mark devenot canon 40d1:34 the segement exchange team removing a segement from keck 1 photography by mark devenot canon 5dmkii1:44 transferring a segment from the crane to a handling cart on the dome floor photography by mark devenot canon 5dmkii1:50 george wall cleaning the keck 1 primary by spraying carbon dioxide snow one frame every two seconds canon g111:56 sunset as seen from the observatory roof time lapse with one exposure every five seconds canon 60d2:06 keck 2 open and operating under a moonlit sky time lapse 30 second exposures with a canon 60d 17mm f45 iso10002:14 keck 2 interior during observing time lapse 30 second exposures with some moonlight canon 20da 10mm f5 iso8002:19 orion rising across the field of view time lapse from a fixed tripod 2 second exposures with a canon 60d 50mm f24 iso10002:26 three lasers keck 1 keck 2 and subaru work the summit sky 90 minutes of one minute exposures were used to contruct the sequence canon 60d 17mm f4 iso40002:37 keck 2 interior during observing time lapse 30 second exposures with bright moonlight canon 20da 10mm f5 iso8002:44 looking down into the keck 2 primary mirror during observing time lapse and moonlit 30 second exposures canon 60d 17mm f4 iso16002:46 stars wheeling over mauna kea as photographed from near hale pohaku 60 second exposures with cumulative addition canon 60d 17mm f4 iso20002:52 stars over keck 2 15 second exposures under bright moonlight canon 60d 17mm f4 iso16002:58 stars wheeling over mauna kea as photographed from near hale pohaku 60 second exposures canon 60d 17mm f4 iso20003:03 moonset and sunrise over the keck telescopes the moon is seen between the domes the domes close then the operators depart the summit the fade to white is caused by sunrise and the resulting overexposure during 15 second exposures canon 60d 17mm f4 iso16003:13 end credits

the biggest cosmic secrets space documentary 2023 - youtube
Bookmarked 153 weeks ago
explore the biggest cosmic secrets in 4k that have intrigued scientists and stargazers for years learn about the elusive planet nine and the evidence of ali

galaxies are running out of gas: study
Bookmarked 761 weeks ago
physorgcom -- a new study has shown why the lights are going out in the universe

hubble space telescope movies at rice university
Bookmarked 759 weeks ago
when it comes to big-budget action movies rice university astronomer patrick hartigan prefers hubble to hollywoodusing hubble space telescope images collected over the past 17 years hartigan has created short movies that offer astronomers their first glimpse of the fluid dynamics that occur in stellar jets huge gouts of gas and particles that spew from the poles of newborn stars

janna levin: the sound the universe makes current
Bookmarked 783 weeks ago
we think of space as a silent place but physicist janna levin says the universe has a soundtrack -- a sonic composition that records some of the most dramatic