Hubble
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The Chandrasekhar Mass and the Hubble Constant
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The first direct detection of gravitational waves was announced in February of 2015 by the LIGO team, after decades of planning, building and refining their beautiful experiment. Since that time, the US-based LIGO has been joined by the European Virgo gravitational wave telescope (and more are planned around the globe). The first four events that…
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The Universe is a Beautiful Place
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Or at least it’s very pretty. These are new pictures from the refurbished Hubble Space Telescope: NGC 6302 is a “planetary nebula”, material ejected from an aging star in our Milky Way galaxy; Omega Centauri is a globular cluster, a dense agglomeration of stars on the outskirts of the galaxy; the Carina Nebula is the…
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Astronomical Objects, Near and Far
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The Hubble Ultra Deep Field (HUDF) is the “deepest” optical observation of the Universe: eleven days of Hubble Space Telescope observations concentrated on a tiny patch of sky. I recently came across this three-dimensional mockup of the HUDF, using our measurements of the redshifts (related to the distances) of each of the galaxies in the…
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Hubble
By now you’ve heard that NASA has changed its mind and decided to send a mission to service the Hubble Space Telescope. Hubble has been an amazing instrument, its pictures seen and marvelled at by people literally around the world. The most amazing thing about NASA’s decision is that it’s front page news for the…
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