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The Milky Way is approximately 890 billion to 1.54 trillion times the mass of the Sun in total (8.9 × 10 11 to 1.54 × 10 12 solar masses), [7][8][9] although stars and planets make up only a small part of this. Estimates of the mass of the Milky Way vary, depending upon the method and data used.
As the name suggests, the continuously habitable zone is a region around a star in which planetary-mass bodies can sustain liquid water for a given period. Like the general circumstellar habitable zone, the continuously habitable zone of a star is divided into a conservative and extended region.
720,000 km/h (450,000 mi/h) [10] Orbital period. ~230 million years [10] The Solar System[d] is the gravitationally bound system of the Sun and the objects that orbit it. [11] It was formed about 4.6 billion years ago when a dense region of a molecular cloud collapsed, forming the Sun and a protoplanetary disc.
v. t. e. In astrobiology and planetary astrophysics, the galactic habitable zone is the region of a galaxy in which life is most likely to develop. The concept of a galactic habitable zone analyzes various factors, such as metallicity (the presence of elements heavier than hydrogen and helium) and the rate and density of major catastrophes such ...
The Large Magellanic Cloud, a satellite galaxy of the Milky Way. A dwarf galaxy is a small galaxy composed of about 1000 up to several billion stars, as compared to the Milky Way 's 200–400 billion stars. [ 1 ] The Large Magellanic Cloud, which closely orbits the Milky Way and contains over 30 billion stars, [ 2 ] is sometimes classified as a ...
The Milky Way over Uluru. The Dreaming, according to Carl Strehlow, sees the Milky Way as a river connected to the dwelling of a Creator Deity. Early doubts about the precision of Spencer and Gillen's English gloss were expressed by the German Lutheran pastor and missionary Carl Strehlow in his 1908 book Die Aranda (The Arrernte).
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. [1] The first constellations likely go back to prehistory. People used them to relate stories of their beliefs, experiences, creation, and mythology.
In Egyptian mythology, the Milky Way was considered a pool of cow's milk. The Milky Way was deified as a fertility cow-goddess by the name of Bat (later on syncretized with the sky goddess Hathor). The astronomer Or Graur has suggested that the Egyptians may have seen the Milky Way as a celestial depiction of the sky goddess Nut.