ripples: Crab Nebula, photographed by Hubble, autumn 2005.
10 images in 558 nm (green) light, September-December 2005.
The Crab Nebula is a cloud of gas 11 light years across, created by the collapse and explosion of a giant star in 1054 AD (a Type II supernova). At the centre of the nebula is a neutron star, the Crab Pulsar, the incredibly dense remnant of the original star; 1.5 to 2 times the mass of the Sun, but only 30 km across. Intense solar wind from the pulsar creates visible ripples in the surrounding nebula.
From Proposal 10526. Some more gifs of the Crab Nebula seen by Hubble.
Image credit: NASA/ESA/STScI. Animation: AgeOfDestruction.
A ‘Ring of Fire’ solar eclipse is a rare phenomenon that occurs when the moon’s orbit is at its apogee: the part of its orbit farthest away from the Earth. Because the moon is so far away, it seems smaller than normal to the human eye. The result is that the moon doesn’t entirely block out our view of the sun, but leaves an “annulus,” or ring of sunlight glowing around it. Hence the term “annular” eclipse rather than a “total” eclipse.
I’m in complete awe.