1. Constellations and stellar clusters

    08:16

    from Sha Tin College Science / Added

    100 Plays / / 0 Comments

    In this video the difference between constellations and stellar clusters is explained. Stars do move relative to each other but because stars are so far away from observers on Earth, this motion appears negligible. As a consequence stars seem to appear fixed relative to each other in the night sky over many centuries. However the spinning of the Earth on its axis causes the stars to appear to rotate about a fixed point in the night sky during the night. Also the orbit of the Earth about the Sun means that different constellations may be observed in the night sky at different times of year. These apparent movements of stars are also explained in the presentation. This video will support your learning in IB Physics option E; Astrophysics

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    • Astros Errantes e Estrela pelo Telescópio

      01:13

      from Douglas Bortolanza Lara / Added

      167 Plays / / 0 Comments

      https://sites.google.com/site/astronomiaemdourados/ Filme experimental usando uma webcam acoplada no telescópio para obter imagens do céu. No caso, Vênus, Júpiter e a luas galileanas, e a estrela Capella (Aur). Experimental film using a webcam attached to the telescope to obtain images of the night sky. Film with Venus, Jupiter and the Galilean moons, and the star Capella (Aur). EQUIPAMENTOS: - Notebook - Webcam SPC230NC - PHILIPS - Telescópio newtoniano | TASCO Galaxsee | 114mm | F500mm Douglas Bortolanza Lara doug_s6@yahoo.com.br Dourados, MS - 10.Fev.2012 Música: Type O Negative - Der Untermensch *** http://www.facebook.com/AstronomiaDourados http://twitter.com/doug_s6

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      • nebeto.eu - Astronomy for everyone

        00:53

        from Nebeto / Added

        18 Plays / / 0 Comments

        http://nebeto.eu

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        • January lights at Troms

          03:04

          from Ville Kröger / Added

          5,116 Plays / / 6 Comments

          Aurora Borealis blazing near Skibotn, Troms fylkeskommune, Norway, on and around the geomagnetic storm of 24th of January, 2012. I've lived most of my life in southern Finland, and can only recall one instance of seeing aurorae, during the last solar cycle, in fact. The past fall had a few geomagnetic events that reached these latitudes - enough to raise interest, but nothing you would call spectacular. Hence, northern Norway. We decided to delay the trip for two weeks, due to the Moon being rather full on the original date. Lucky us. The music is by Lasswell and is released under the Creative Commons BY-NC 3.0 -license: http://ccmixter.org/files/lazztunes07/15554 This video is released under the very same license. You're pretty much free to do whatever you want with it, if you mention the original source and don't make money off of it. There are a couple of stills in my deviantART gallery. Also, other pictures. At least one has a duck in it: http://k-vuohi.deviantart.com/

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          • "Open The Bottle, Open The Mind" Walking Mountains Science Center

            07:30

            from KHz Productions / Added

            156 Plays / / 1 Comment

            The mission of Walking Mountains Science Center is to awaken a sense of wonder and inspire environmental stewardship through natural science education. This video highlights a few of the many of the programs offered through Walking Mountains Science Center, including "Field Studies", "Girls In Science", "Community Programs", "In-School Science" and more. For more information, visit walkingmountains.org

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            • Keck in Motion

              03:36

              from Andrew Cooper / Added

              72.2K Plays / / 22 Comments

              Keck Observatory operates two ten-meter telescopes atop the summit of Mauna Kea Hawai'i. 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 possible. The 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 moving. Slower 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 long. Many 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 sky. A 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 time. I 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 video. Scene Guide... 0:00 Liz Chock performing her usual software magic from her office at headquarters, Canon 60D 0:12 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 60D 0:17 The Keck 2 telescope slewing 180° in azimuth, video at 10x real time, Canon 60D 0:23 The interferometer FTS corner cubes moving into beam, Canon 60D 0:26 A pencil beam shutter dropping into place, used to create a narrow laser beam for aligning interferometer optics, Canon 60D 0:28 Interferometer Fast Delay Lines moving along the tracks, video at 7x real time, Canon 60D 0:34 The Keck 2 telescope slewing at 7x real time, Canon 60D 0:39 The interferometer Long Delay Lines moving at 10x real time, Canopn 60D 0:44 Another shot of the interferometer fast delay lines at 6x real time, Canon 60D 0:50 The Keck 2 telescope slewing at 10x real time, Canon 60D 0:55 CNC milling of a spectrograph slitmask, 11x real time, Canon 60D 1:01 Cold vapor issuing from the liquid nitrogen dewar of FATCAT Secondary, 0.75x real time, Canon 60D 1:06 Clouds flowing behing the Keck telescopes, one frame every 5 seconds, Canon G11 1:12 David Lynn, Rodney Eisenhour and Grant Hill removing the ESI spectrograph from Keck 2, time lapse with one frame every two seconds, Canon G11 1:21 Ray Nyberg and Joe Gargiulo installing the LRIS Spectrograph into Keck 1, one frame every two seconds, Canon G11 1:28 George Wall and Steve Doyle stripping the old aluminum coating from a tertiary mirror in preparation for re-coating, photography by Mark Devenot, Canon 40D 1:34 The Segement Exchange Team removing a segement from Keck 1, photography by Mark Devenot, Canon 5DMkII 1:44 Transferring a segment from the crane to a handling cart on the dome floor, photography by Mark Devenot, Canon 5DMkII 1:50 George Wall cleaning the Keck 1 primary by spraying carbon dioxide snow, one frame every two seconds, Canon G11 1:56 Sunset as seen from the observatory roof, time lapse with one exposure every five seconds, Canon 60D 2:06 Keck 2 open and operating under a moonlit sky, time lapse 30 second exposures with a Canon 60D @ 17mm f/4.5 ISO1000 2:14 Keck 2 interior during observing, time lapse 30 second exposures with some moonlight, Canon 20Da @ 10mm f/5 ISO800 2:19 Orion rising across the field of view, time lapse from a fixed tripod, 2 second exposures with a Canon 60D @ 50mm f/2.4 ISO1000 2:26 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 f/4 ISO4000 2:37 Keck 2 interior during observing, time lapse 30 second exposures with bright moonlight, Canon 20Da @ 10mm f/5 ISO800 2:44 Looking down into the Keck 2 primary mirror during observing, time lapse and moonlit 30 second exposures, Canon 60D @ 17mm f/4 ISO1600 2:46 Stars wheeling over Mauna Kea as photographed from near Hale Pohaku, 60 second exposures with cumulative addition, Canon 60D @ 17mm f/4 ISO2000 2:52 Stars over Keck 2, 15 second exposures under bright moonlight, Canon 60D @ 17mm f/4 ISO1600 2:58 Stars wheeling over Mauna Kea as photographed from near Hale Pohaku, 60 second exposures, Canon 60D @ 17mm f/4 ISO2000 3:03 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 f/4 ISO1600 3:13 End credits

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              • Ladd Observatory at Brown University in Providence, RI Open to Public

                00:46

                from Scott MacNeill / Added

                64 Plays / / 0 Comments

                Ladd Observatory on Brown University, Providence campus opens to the public every clear Tuesday night. This is a time lapse showing an early February night of observation at Ladd Observatory in Providence, Rhode Island Camera: Modified (CHDK) Canon S95 with custom intervalometer Exposure: 0.5" Interval: 10" ISO: 800 f/2 Audio: Sigur Rós - Njósnavélin

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                • Rotation in Space - Professor Carolin Crawford

                  51:18

                  from Gresham College / Added

                  136 Plays / / 0 Comments

                  Rotation is a fundamental physical process throughout the Universe. So much is spinning, from planets and stars revolving on their axes, to whole spiral galaxies rotating around their centre. We shall start by looking at the fundamentals of rotational motion, including the concept of angular momentum. This then will be extended to show what observations of rotation can tell us about how planetary systems form and develop, how neutron stars evolve with time, and how rotational motion provides crucial evidence for the presence and distribution of the elusive dark matter. All our lectures are available for free download from the Gresham College website, in video, audio or text formats: http://www.gresham.ac.uk Gresham College professors and guest speakers have been giving free public lectures in central London since 1597. This tradition continues today and you can attend any of our lectures, or watch or listen to them on our website. Website: http://www.gresham.ac.uk Twitter: http://twitter.com/GreshamCollege Facebook: http://www.facebook.com/pages/Gresham-College/14011689941

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                  • The Sky Tonight (Full Moon in Leo)

                    00:52

                    from BURNS.R % / Added

                    84 Plays / / 0 Comments

                    The Sky Tonight Feb. 6th 2012 Full Moon in Leo with Mars close behind.

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                    • Moonrise

                      01:00

                      from Craig Malamut / Added

                      15 Plays / / 0 Comments

                      This was taken on top the Van Vleck Observatory at Wesleyan University on February 7, 2012.

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