Event Horizon - Astronomical and Terrestrial Images

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NGC869-884.jpg
NGC869 and NGC884 - The Double Cluster in Perseus449 viewsOpen clusters - NGC869 is center/bottom, 7460 light-years away; NGC884, top, 7640 light-years away
M88-20240427_RASA11_ASI2600_LPQ3.JPG
Messier 88 - Spiral galaxy in Coma Berenices449 viewsA member of the Virgo Cluster although it appears in the neighboring constellation of Coma Berenices. About 47 million light-years distant from Earch; boasts a 100-million solar mass black hole at its core.
NGC1499_20220828_NB3~1.jpg
NGC1499 - The California Nebula, narrowband version448 viewsThis bizarre rendition of the California Nebula was the result of an unrepeatable experiment in mapping H-alpha and O-III to various channels in a mad orgy of improvisation.
M74_20241122_RASA11_ASI2600MC_OLQ2.JPG
M74, Spiral Galaxy in Pisces448 viewsGrand design spiral galaxy with two clearly defined spiral arms winding counterclockwise from center. About 32 million light-years distant.
SolarEclipse-20170821-3787.jpg
Fifteen Minutes after Third Contact447 viewsC3 + 15:16
SolarEclipse-20170821-3807.jpg
28 Minutes after Third Contact447 viewsC3 + 28:08
M31_20230914_LPF_v1.jpg
M31 - The Andromeda Galaxy447 viewsBarred spiral galaxy, 152,000 light-years in diameter and 2.5 million light-years from Earth.
M104_20240309_RASA11_NBZ2c.JPG
Messier 104 - The Sombrero Galaxy447 viewsUnique spiral galaxy 31 million light-years from Earth on the border of the constellations Virgo and Corvus. It has a bright nucleus, an unusually large central bulge, and a prominent dust lane in its outer disk.
NGC6543-20160604.jpg
NGC 6543 - Cat's Eye Nebula446 viewsA structurally very complex planetary nebula about 3000 light-years from Earth in the constellation Draco. In large-telescope images it has the appearance of a cat's eye, but in my 5" refractor it appears simply as a bright blue star with a halo. The small spiral galaxy off to the left is probably NGC 6552.
Sh2-275-20231206-NBZ1.JPG
Sharpless2-275 - The Rosette Nebula446 viewsHII region in the constellation Monoceros; distance 5,200 light-years from Earth. Open cluster NGC2244, in the doughnut hole, provides the energy that makes the nebula glow.
Sh2-82_20240803_RASA11_ASI2600_NBZ2.JPG
Sharpless 2-82 - The Little Cocoon nebula in Sagitta446 viewsAlso known as the Little Trifid Nebula, LBN 129 and DG 159. Ionized by the B0.5V star HD 231616.
SolarEclipse-20021204-DX027.jpg
Dragon's Tooth445 viewsFourth Contact (end of post-totality partial phase) will occur at 8:34:23 local time, with the Sun well below the horizon.
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