Troubles With Bubbles

  Original Post October 26, 2012 Both nuclear powered stars and electrically powered stars produce bubbles in the plasma surrounding them. From that common observational beginning, the theoretical explanations diverge. Nuclear generated bubbles come in two types: planetary nebulae (PNs) and supernova (SN) remnants. The PNs are bubbles that are…

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Seeing Seagulls

  Original Post October 22, 2012 To talk about something, we have to conceive ideas and words with which to describe the thing. We can’t avoid these pre-conceptions. But will we try to compensate for this prejudice by conceiving more than one? The Seagull Nebula is a splotch of light…

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The Fall of El Gordo

Colliding galaxy clusters

Original Post July 12, 2012 El Gordo is so called because it is the biggest, brightest, and hottest pair of colliding galaxy clusters known to astronomers. Astronomers “know” that El Gordo is over 7 billion light-years from Earth. This knowledge derives from the amount by which El Gordo’s light is shifted toward…

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Electric Helix

New infrared image of the Helix Nebula in Aquarius

Original Post July 5, 2012 A recent image of the Helix Nebula in the constellation Aquarius exposes more details of its electrical structure. The new infrared image shows radial Birkeland currents (called “strands” in the press release) crossing the concentric rings and converging on the central star. (Will “strands” now replace…

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