Block Nebula

The Block Nebula is a reflection nebula located in the central part of Yearn Sector, within the Empty Stars. It lies within the Great Void.

Block Nebula

The Block Nebula is a large dim group of gases and dark clouds measuring around 9 parsecs coreward-rimward by 6 parsecs spinward-trailing. Parsec-sized "pockets" of gas and dust are located to spinward-coreward and to rimward-trailing of the nebula.

• It is classified as a reflection nebula and is primarily formed of ionized gases, thrown off by the stars at its center many millennia ago.
• The gases consist of about 90% hydrogen, with the remainder made up of helium, oxygen, nitrogen, and other elements. The clouds have a mean density of 10²–10⁶ particles/cm³. Its central regions are relatively denser.

Two separate star systems lie at its core:

BN1-ab has two stars in the star system.

BN1-ab
	Type	Category		Mass (Sol)	Temperature (K)	Luminosity
	A0 IV	Subgiant		6	9000 - 9900	156
	Unit	Diameter	Safe Distance	Habitable Zone	Jump Shadow	M-Drive Limit
	AU	0.04187	1.03597	9.93 - 16.18	4.187	41.87
	Orbit #	*	3	7	6	9
	Remarks
BN1-ab
	Type	Category		Mass (Sol)	Temperature (K)	Luminosity
	BD	Brown Dwarf		0.0276	950 - 1250	0
	Unit	Diameter	Safe Distance	Habitable Zone	Jump Shadow	M-Drive Limit
	AU	0.00092	0.00038	0 - 0.01	0.092	0.92
	Orbit #	*	*	*	*	3
	Remarks

Hex Location: 1026 Yearn Sector. 0 Gas Giants.

---

BN2-a has a solitary primary star.

BN2-a
	Type	Category		Mass (Sol)	Temperature (K)	Luminosity
	D	White Dwarf		0.53	6800 - 6800	0
	Unit	Diameter	Safe Distance	Habitable Zone	Jump Shadow	M-Drive Limit
	AU	0.00011	0.00168	0 - 0.03	0.011	0.11
	Orbit #	*	*	*	*	0
	Remarks

Hex Location: 1125 Yearn Sector. 0 Gas Giants.

History

The positions and types of the stars present within the Block Nebula have been cataloged as part of the University of Selasia Spinward Survey.

The nebula is named for its supposed resemblance to a block and tackle.

References & Contributors / Sources

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• Author & Contributor: Lord (Marquis) and Master Scout Emeritus Adie Alegoric Stewart of the IISS
• Author & Contributor: Lord (Marquis) and Master of Sophontology Maksim-Smelchak of the Ministry of Science