Distances used in Astronomy.

 There are various distances used to measure in Space/Astronomy. They are Mile, Kilometer, AU, Light year, Parsec.

Mile and Kilometer- it is used for near by objects or Moon.

AU(Astronomical Unit)-it is average distance between Sun & Earth. Probably used within solar system limits.

Light year-Distance travelled by light in 1 year. It is used for larger distance beyond solar system. The distance between "Proxima Centauri" (the nearest star from earth) is 4.246 light years.

Parsec - it is a unit of distance equal to 3.26 light-years.

Cosmic distance ladder (extragalactic distance scale) - It is a technique of several methods used by Astronomers to determine the distance of cosmological bodies beyond our own galaxy, which are not easily determined using traditional methods.

Learn more from below links-

https://en.wikipedia.org/wiki/Cosmic_distance_ladder#Galactic_distance_indicators

https://solarsystem.nasa.gov/news/1230/cosmic-distances/

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


Below translation in Portuguese is done by Elaine ( Teacher from Brazil)

Distâncias usadas em Astronomia.

 Existem várias distâncias usadas para medir em Espaço / Astronomia.  Eles são Milha, Quilômetro, UA, Ano-luz, Parsec.

 Milha e Quilômetro - é usado para objetos próximos ou Lua.

 AU (Unidade Astronômica) - é a distância média entre o Sol e a Terra.  Provavelmente usado dentro dos limites do sistema solar.

 Ano-luz - Distância percorrida pela luz em 1 ano.  É usado para distâncias maiores além do sistema solar.  A distância entre "Proxima Centauri" (a estrela mais próxima da Terra) é de 4,246 anos-luz.

 Parsec - é uma unidade de distância igual a 3,26 anos-luz.

 Escada de distância cósmica (escala de distância extragaláctica)  - É uma técnica de vários métodos usados ​​por Astrônomos para determinar a distância de corpos cosmológicos além de nossa própria galáxia, que não são facilmente determinados por métodos tradicionais.

 Saiba mais nos links abaixo;

 https://en.wikipedia.org/wiki/Cosmic_distance_ladder#Galactic_distance_indicators

 https://solarsystem.nasa.gov/news/1230/cosmic-distances/

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


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