small-pin-count IC packages .to, Tonga's Internet country code top-level domain Teraoctet (To), a unit of digital information equal to 1012 octets Takeoff...

(10 million light-years; 9×1019 kilometres), and a total mass of the order of 2×1012 solar masses (4×1042 kg). It consists of two collections of galaxies in a...

strong line are classified as type Ib and Ic, with type Ib showing strong neutral helium lines and type Ic lacking them. Historically, the light curves...

diameters. The unit of measurement used is the light-year (approximately 9.46×1012 kilometers). Galaxies are vast collections of stars, planets, nebulae and...

in the early 990s, with highly devastating assaults in 1006–1007 and 1009–1012. Tribute payments by Æthelred did not successfully temper the Danish attacks...

cannot be ruled out. While the Andromeda Galaxy contains about 1 trillion (1012) stars and the Milky Way contains about 300 billion (3×1011), the chance...

Klemola 27 group (now known as the IC 4329 galaxy group). The group consists of prominent galaxies such as the namesake IC 4329 – another massive supergiant...

together with the name of the observing project (HUDF, SDSS, 3C, CFHQS, NGC/IC, etc.) This is a list of galaxies that are well known by something other than...

times more luminous than the Sun (i.e. it has an infrared luminosity of 1012 L☉). Astronomers have speculated that either intense star formation regions...

contains several star clusters, such as IC 4665, NGC 6633, M9, M10, M12, M14, M19, M62, and M107, as well as the nebula IC 4603-4604. M9 is a globular cluster...