| Image search results - "55" |
Hickson 55 (VV172)498 viewsIn this famous chain of galaxies the faintest member, second from the top (north) has a much greater redshift than the rest of the group. Why do groups often seem to have an anomalous member? A solution proposed in 1995 was that the mass of the real group acts as a gravitational lens to magnify and brighten any background galaxy in the same line of sight. This would produce more apparent discordant redshift members than pure chance would provide. David R.
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Caldwell 36 and X7 334 viewsX7 is an ultra-luminous x-ray source (ULX) located way out on the western edge of galaxy NGC4559 (Caldwell36). It is believed to be a large black hole swallowing material from a companion and its formation was probably triggered by an encounter with dwarf galaxy "g" shown in the insets. David R.
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Sharpless Nebulae Sh2-254, 255, 256, 257 and 258269 viewsContinuing on the trail of the Sharpless nebulae this relatively unknown group in Orion caught my eye and with 5 objects for the price of one it was too good to miss.
3 hours H-alpha + 3 hours RGB.
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