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The Local Group is the galaxy group that includes the Milky Way, where Earth is located. It has a total diameter of roughly 3 megaparsecs (10 million light-years; 9 × 10 19 kilometres ), [1] and a total mass of the order of 2 × 10 12 solar masses (4 × 10 42 kg). [2] It consists of two collections of galaxies in a "dumbbell" shape; the Milky ...
Size (left) and distance (right) of a few well-known galaxies put to scale. The following is a list of notable galaxies.. There are about 51 galaxies in the Local Group (see list of nearest galaxies for a complete list), on the order of 100,000 in the Local Supercluster, and an estimated 100 billion in all of the observable universe.
Weak gravitational lensing and intrinsic galaxy alignments. Doctoral advisor. Lance Miller [1] Website. www .roe .ac .uk /~heymans. Catherine Heymans FRSE (born 1978/1979) is a British astrophysicist, the Astronomer Royal for Scotland, and a professor at the University of Edinburgh based at the Royal Observatory, Edinburgh. [3] [4] [5] [6]
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Magnitude (astronomy) An illustration of light sources from magnitude 1 to 3.5, in 0.5 increments. In astronomy, magnitude is measure of the brightness of an object, usually in a defined passband. An imprecise but systematic determination of the magnitude of objects was introduced in ancient times by Hipparchus .
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Sabrina Annlynn Carpenter (born May 11, 1999) is an American singer and actress. She first gained recognition as a Disney Channel personality, playing lead roles in the comedy series Girl Meets World (2014–2017) and the adventure comedy film Adventures in Babysitting (2016).
Stephen William Hawking CH CBE FRS FRSA (8 January 1942 – 14 March 2018) was an English theoretical physicist, cosmologist, and author who was director of research at the Centre for Theoretical Cosmology at the University of Cambridge. [6] [17] [18] Between 1979 and 2009, he was the Lucasian Professor of Mathematics at Cambridge, widely ...