Short notes on Astromy 10 dec. 2017.

Short notes on Astromy 10 dec. 2017.



Milky Way - Wikipedia

https://en.wikipedia.org/wiki/Milky_Way

The Milky Way is the galaxy that contains our Solar System. The descriptive "milky" is derived from the appearance from Earth of the galaxy – a band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye. The term Milky Way is a translation of the Latin via lactea, from the ...

‎Milky Way · ‎Milky Way (disambiguation) · ‎List of names for the Milky Way · ‎Galaxy

Galaxy - Wikipedia

https://en.wikipedia.org/wiki/Galaxy

A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter. The word galaxy is derived from the Greek galaxias (γαλαξίας), literally "milky", a reference to the Milky Way. Galaxies range in size from dwarfs with just a few hundred million (10⁸) stars to giants with one hundred ...

‎Andromeda Galaxy · ‎Spiral galaxy · ‎Galaxy cluster · ‎Elliptical galaxy

black hole

noun

noun: black hole; plural noun: black holes; noun: blackhole; plural noun: blackholes

1. Astronomy

   a region of space having a gravitational field so intense that no matter or radiation can escape.

   • informal

     a place where money or lost items apparently disappear without trace.

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What Is a Black Hole? | NASA

https://www.nasa.gov/audience/forstudents/k-4/.../what-is-a-black-hole-k4.html

A black hole is a place in space where gravity pulls so much that even light cannot get out.

‎Fall into a Black Hole! · ‎What Is an Eclipse? · ‎Black Hole Rescue! · ‎What Is an Orbit?

Black hole

supernova

ˌsuːpəˈnəʊvə/

noun

Astronomy

noun: supernova; plural noun: supernovae; plural noun: supernovas

1. a star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass.

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Supernova | Define Supernova at Dictionary.com

www.dictionary.com/browse/supernova

Supernova definition, the explosion of a star, possibly caused by gravitational collapse, during which the star's luminosity increases by as much as 20 magnitudes and most of the star's mass is blown away at very high velocity, sometimes leaving behind an extremely dense core. See more

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White dwarf - Wikipedia

https://en.wikipedia.org/wiki/White_dwarf

A white dwarf, also called a degenerate dwarf, is a stellar core remnant composed mostly of electron-degenerate matter. A white dwarf is very dense: its mass is comparable to that of the Sun, while its volume is comparable to that of Earth.

‎Black dwarf · ‎Type Ia supernova · ‎Pulsating white dwarf - Wikipedia · ‎White dwarfs