Official Setting information is in darkgreen
. Extended Universe information is in steelblue
|Locations: Orion-Cygnus Arm (Local Spur)|
The Orion-Cygnus Arm (Local Spur) is a minor spiral arm of the galaxy, some 3,500 ly across and approximately 10,000 ly in length. The solar system and Earth are located close to the inner rim in the Local Bubble, about half-way along the Arm's length, approximately 26,000 ly from the galactic center.
434 light years; Polaris
Polaris (commonly North Star) is the brightest star in the constellation Ursa Minor. It is very close to the north celestial pole, making it the current northern pole star. It is a multiple star.
- Alpha UMi A
- 6 solar masses.
- an F7 bright giant (II) or supergiant (Ib).
- Alpha UMi B
- 1.5 solar masses.
- an F3V main sequence star
- orbits at 2,400 AU
- Alpha UMi Ab
- 1.5 solar masses.
- dwarf star
- orbits at 18.5 AU.
- Alpha UMi C
- Alpha UMi D
- is the second brightest star in the constellation Orion and the tenth brightest star in the nighttime sky.
- is a red supergiant star, one of the physically largest stars known. If it was placed at the center of our Solar System, the Earth would be engulfed and would be inside it.
- Its proximity to Earth, combined with its enormous size, make it the star with the third largest angular diameter as viewed from Earth.
- Is one of the closest planetary nebulae to Earth - 650 light-years from Sol.
- Is a planetary nebula created at the end of the life of a Sun-like star. The outer gases of the star expelled into space appear from our vantage point as if we are looking down a helix. The remnant central stellar core, destined to become a white dwarf star, glows in light so energetic that it causes the previously expelled gas to fluoresce.
1,550 light years; Deneb
- is the brightest star in the constellation Cygnus and one of the brightest stars in the night sky, with apparent magnitude 1.25.
- about 1,600 to 3,200 light years from Sol.
- It appears to have a diameter about 200 to 300 times that of the Sun; if placed at the center of our Solar System, Deneb would extend to the orbit of the Earth. It is one of the largest stars known.
- Deneb IV - habitable planet orbiting the star.
- 5,000 light-years away from Sol.
- The nebula is at 1º kelvin - the coldest place known outside a laboratory.
- The Boomerang Nebula is formed from the outflow of gas from a star at its core. The gas is moving outwards at a speed of about 600,000 km/h and expanding rapidly as it moves out into space. This expansion is the cause of the nebula's very low temperature. It is believed that the nebula is a star or stellar system evolving toward the planetary nebula phase.
© Aaron Sketchley