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The Prawn Nebula (IC 4628) is a large emission nebula in the constellation Scorpius, known for its reddish glow and resemblance to a prawn, especially in astrophotography. It's a stellar nursery, about 6,000 light-years away, where gas is ionized by nearby massive stars, causing it to glow. It's part of a larger star-forming region and is often imaged alongside open clusters like NGC 6231.

Designation: IC 4628, also known as Gum 56. 

Location: Constellation Scorpius, in the Sagittarius Arm of the Milky Way. 

Type: Emission nebula, meaning it's energized by radiation from hot, young stars within it. 

Appearance: Its name comes from its shape, which looks like a cosmic prawn, particularly in detailed images. 

Associated Objects: It's linked to the bright open cluster NGC 6231, which anchors a "False Comet" structure. 

Visibility: It's a faint object that is difficult to see visually but is a popular target for astrophotographers. Image Credit ESO

NGC 1851 (Caldwell 73) is a dense, massive globular star cluster in the constellation Columba, about 40,000 light-years away, known for its unusual features like multiple stellar populations of different ages and a surrounding stellar halo, suggesting it may be the remnant core of a dwarf galaxy that merged with the Milky Way. It's visible with binoculars as a fuzzy patch and can be resolved into individual stars with a small telescope, appearing as a bright, condensed ball of light. 

Type: Globular cluster 

Location: Constellation Columba, about 39,500 light-years from Earth 

Apparent Magnitude: 7.3 

Age: Estimated 9.2 billion years old 

Mass: 551,000 times the mass of the Sun 

Multiple Stellar Populations: Contains stars of different ages, unlike most globular clusters. 

Stellar Halo: Surrounded by a diffuse halo of stars that extends far beyond the main cluster. 

Formation Theory: The multiple populations and halo suggest it might be the stripped nucleus of a dwarf galaxy that was c