1. Cataclysmic variables

    12:22

    from Linda Sjoberg / Added

    9 Plays / / 0 Comments

    This is a description of a common type of cataclysmic variable. In this video a red dwarf and a white dwarf orbit each other in close proximity. The hydrogen pulled from the red dwarf by the white dwarf forms an accretion disk, One possible outcome of a cataclysmic variable is a type 1A super novae.

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    • Hubblecast 71: Visible echoes around RS Puppis

      05:04

      from HubbleESA / Added

      76 Plays / / 0 Comments

      This episode of the Hubblecast explores striking new Hubble observations of a variable star known as RS Puppis. This star is growing brighter and dimmer as it pulsates over a period of five weeks. These pulsations have created a stunning example of a phenomenon known as a light echo, where light appears to reverberate through the foggy environment around the star. More information and download options: http://www.spacetelescope.org/videos/heic1323b/ Subscribe to our iTunes channel here: https://itunes.apple.com/gb/podcast/hubblecast-hd/id258935617 Credit: ESA/Hubble Directed by: Nicola Guttridge Visual design and editing: Martin Kornmesser Written by: Nicola Guttridge & Georgia Bladon Presented by: Joe Liske (Dr J) Narration: Sara Mendes da Costa Images: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)-Hubble/Europe Collaboration Acknowledgment: H. Bond (STScI and Penn State University) View of Milky Way: Nick Risinger (skysurvey.org). Videos: ESA/Hubble (M. Kornmesser, L. Calçada), G. Bacon (STScI) Music: Zero Project Web and technical support: Mathias Andre and Raquel Yumi Shida Cinematography: Peter Rixner (perix-media-gmbh.de) Executive producer: Lars Lindberg Christensen

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      • Light echoes around the pulsating star RS Puppis

        01:12

        from Pierre Kervella / Added

        94 Plays / / 0 Comments

        The southern star RS Puppis changes regularly in luminosity with a period of 41.5 days. It belongs to a very important class of pulsating stars, the Cepheids, that is used to measure distances in the Universe. RS Pup is one of the most luminous Cepheids in the Milky Way. It is unique in being surrounded by a large dusty nebula that reflects the light from the central star. Due to the very large distances involved, the light variations of the central star do not propagate instantly in the nebula, creating wonderful light echoes. The light echoes of RS Pup are one of the most spectacular example of this phenomenon. Further details can be found in this article: http://dx.doi.org/10.1051/0004-6361/201424395 . Music: Epilogue (Let It Come Down) by nisei23 (http://nisei23.com)

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        • Animation of a variable star

          00:47

          from HubbleESA / Added

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          This artist's illustration shows a star turning into a variable star, expanding and shrinking — growing brighter and dimmer as it does so. More information and download options: http://www.spacetelescope.org/videos/heic1323j/ Credit: NASA, ESA, M. Kornmesser

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          • Artist's impression of the light echo around RS Puppis

            00:34

            from HubbleESA / Added

            20 Plays / / 0 Comments

            This illustration shows an artist's impression of the light echo around variable star RS Puppis. More information and download options: http://www.spacetelescope.org/videos/heic1323i/ Credit: NASA, ESA, M. Kornmesser

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            • Light echoes around RS Puppis

              00:26

              from HubbleESA / Added

              1,406 Plays / / 0 Comments

              This time-lapse video uses observations from the NASA/ESA Hubble Space Telescope over a number of weeks to show the variable star RS Puppis and its environment. A stunning example of a phenomenon known as a light echo can be seen around the star, creating the illusion of gas clouds expanding out from RS Puppis. More information and download options: http://www.spacetelescope.org/videos/heic1323a/ Credit: NASA, ESA, G. Bacon (STScI), the Hubble Heritage Team (STScI/AURA)-ESA/Hubble Collaboration, and H. Bond (STScI and Pennsylvania State University)

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              • Morph of the light echo around RS Puppis

                00:09

                from HubbleESA / Added

                14 Plays / / 0 Comments

                This video morphs the observations of variable star RS Puppis, showing the light echo that can be seen around the star. More information and download options: http://www.spacetelescope.org/videos/heic1323c/ Credit: NASA, ESA, the Hubble Heritage Team (STScI/AURA)-ESA/Hubble Collaboration, and H. Bond (STScI and Pennsylvania State University)

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