“Watch the video for the full story
pJudging distances across intergalactic space isn’t easy, so in order to figure out how far away galaxies are astronomers have learned to use the light from Type Ia supernovae, which flare up with the brilliance of 5 billion Suns and rather precisely so.Type Ia supernovae are thought to be created from a pairing of two stars: one super dense white dwarf which draws in material from a binary companion until a critical mass about 40% more mass than the Sun is reached. The overpacked white dwarf suddenly undergoes a rapid series of thermonuclear reactions and explodes in an incredibly bright outburst of material and energy.Read more: A New Species of Type Ia Supernova?”We don’t really know what kind of star it is that leads to these explosions, which is kind of embarrassing,” says Graur. “The companion star could be a regular star like our Sun, a red giant or supergiant, or another white dwarf.”Because stars age at certain rates, by looking deeper into space with the Hubble and Subaru telescopes Graur hopes to determine how often and when in the Universe’s history Type Ia supernovae occur, and thus figure out what types of stars are most likely responsible.”My rate measurements favor a second white dwarf as the binary companion,” Graur says, “but the issue is far from settled.”Watch the video for the full story, and visit PHD TV andPHD Comicsfor more great science illustrations.Share this:Click to share on Facebook (Opens in new window)Click to share on Pocket (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Google+ (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Pinterest (Opens a href=”https://www.onlinereplicabags.com” rel=”friend”Replica Designer Handbags/a in new window)Click to share on Reddit (Opens in new window)Click to print (Opens in new window)MoreClick to email this to a friend (Opens in new window)Thanks for that reply Jason, a href=”https://www.onlinereplicabags.com” rel=”friend”https://www.onlinereplicabags.com/a brilliant article, especially for those who don know much about the subject like me.
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