Table of Contents
18 relations: Cassiopeia (constellation), Comet, Constellation, Durchmusterung, Earth, G-type main-sequence star, Henry Draper Catalogue, Light-year, List of long-period comets, List of nearest stars, Million years ago, Oort cloud, Sednoid, Smithsonian Astrophysical Observatory Star Catalog, Solar mass, Solar System, Star, Sun.
Cassiopeia (constellation)
Cassiopeia is a constellation and asterism in the northern sky named after the vain queen Cassiopeia, mother of Andromeda, in Greek mythology, who boasted about her unrivaled beauty.
See HD 7977 and Cassiopeia (constellation)
Comet
A comet is an icy, small Solar System body that warms and begins to release gases when passing close to the Sun, a process called outgassing.
Constellation
A constellation is an area on the celestial sphere in which a group of visible stars forms a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.
Durchmusterung
In astronomy, Durchmusterung or Bonner Durchmusterung (BD) is an astrometric star catalogue of the whole sky, published by the Bonn Observatory in Germany from 1859 to 1863, with an extension published in Bonn in 1886.
See HD 7977 and Durchmusterung
Earth
Earth is the third planet from the Sun and the only astronomical object known to harbor life.
G-type main-sequence star
A G-type main-sequence star (spectral type: G-V), also often, and imprecisely, called a yellow dwarf, or G star, is a main-sequence star (luminosity class V) of spectral type G. Such a star has about 0.9 to 1.1 solar masses and an effective temperature between about.
See HD 7977 and G-type main-sequence star
Henry Draper Catalogue
The Henry Draper Catalogue (HD) is an astronomical star catalogue published between 1918 and 1924, giving spectroscopic classifications for 225,300 stars; it was later expanded by the Henry Draper Extension (HDE), published between 1925 and 1936, which gave classifications for 46,850 more stars, and by the Henry Draper Extension Charts (HDEC), published from 1937 to 1949 in the form of charts, which gave classifications for 86,933 more stars. HD 7977 and Henry Draper Catalogue are Henry Draper Catalogue objects.
See HD 7977 and Henry Draper Catalogue
Light-year
A light-year, alternatively spelled light year (ly or lyr), is a unit of length used to express astronomical distances and is equal to exactly 9,460,730,472,580.8 km (Scientific notation: 9.4607304725808 × 1012 km), which is approximately 5.88 trillion mi.
List of long-period comets
The following list is of comets with very long orbital periods, defined as between 200 and 1000 years.
See HD 7977 and List of long-period comets
List of nearest stars
This list covers all known stars, white dwarfs, brown dwarfs, and sub-brown dwarfs within of the Sun.
See HD 7977 and List of nearest stars
Million years ago
Million years ago, abbreviated as Mya, Myr (megayear) or Ma (megaannum), is a unit of time equal to (i.e. years), or approximately 31.6 teraseconds.
See HD 7977 and Million years ago
Oort cloud
The Oort cloud, sometimes called the Öpik–Oort cloud, is theorized to be a vast cloud of icy planetesimals surrounding the Sun at distances ranging from 2,000 to 200,000 AU (0.03 to 3.2 light-years).
Sednoid
A sednoid is a trans-Neptunian object with a large semi-major axis and a high perihelion, similar to the orbit of the dwarf planet Sedna.
Smithsonian Astrophysical Observatory Star Catalog
The Smithsonian Astrophysical Observatory Star Catalog is an astrometric star catalogue, created by Smithsonian Institution, a research institute.
See HD 7977 and Smithsonian Astrophysical Observatory Star Catalog
Solar mass
The solar mass is a standard unit of mass in astronomy, equal to approximately.
Solar System
The Solar SystemCapitalization of the name varies.
Star
A star is a luminous spheroid of plasma held together by self-gravity.
See HD 7977 and Star
Sun
The Sun is the star at the center of the Solar System.
See HD 7977 and Sun