Gw mau tau Bagbagan astronomi dari Astronomi. Jelasin dalam bahasa sunda

Dina mangsa munggaranana, balik deui ka jaman Yunani kuna jeung nu séjénna, astronomi utamana ngulik astrométri, ngalelebah planét jeung bintang di langit. Kadieunakeun, pagawéan Kepler jeung Newton geus naratas jalan pikeun celestial mechanics, nu sacara matematis ngaramal ketak/pola interaksi celestial bodies nu kapangaruhan ku graviti, jeung objék-objék tatasurya umumna. Pagawéan-pagawéan nu dikeureuyeuh dina dua widang ieu, nu baheula lolobana dipigawé ku leungeun, ayeuna mah geus maké alat-alat otomatis, nepi ka geus dianggap lain disiplin mandiri deui. Gerakan jeung posisi objék geus gampang pisan ditéang, astronomi modérn leuwih merhatikeun jeung ngusahakeun nengetan jeung neuleuman sipat fisik sabenerna objék-objék langit—what makes them "tick".

Ti mimiti abad ka-20 widang astronomi profésional beulah jadi observational astronomy jeung astrofisik tioritis. Najan astronomer lolobana ngagabungkeun unsur-unsur ti éta dua widang dina panalungtikanana, ku sabab bédana kaahlian nu dipaké, lolobana astronomer profésional leuwih condong ka salah sahijina. Observational astronomy leuwih condong utamana ka ngumpulkeun data, kaasup ngawangun jeung ngaropéa instrumén sarta ngolah data nu kakumpulkeun; cabang ieu ayeuna disebut salaku "astrométri" atawa "astronomy". Théoretical astrophysics is concerned mainly with figuring out the observational implications of different modéls, and involves working with computer or analytic modéls.

Widang ulikan astronomi ogé digolongkeun dumasar dua jalan nu béda: dumasar "subjék", biasana nurutkeun wewengkon langit (misalna Galactic astronomy) atawa "masalah nu ditujul" (saperti dibentukna béntang atawa kosmologi); atawa dumasar cara nu dipaké pikeun meunangkeun data.

Dumasar subjék atawa masalah nu ditujul

Astrobiologi: the study of the advent and evolution of biological systems in the universe.

Astrométri: the study of the position of objects in the sky and their changes of position. Defines the system of coordinates used and the kinematics of objects in our galaxy.

Kosmologi: the study of the universe as a whole and its evolution.

Galactic astronomy: the study of the structure and components of our galaxy and of other galaxies.

Extragalactic astronomy: the study of objects (mainly galaxies) outside our galaxy.

Galaxy formation and evolution: the study of the formation of the galaxies, and their evolution.

Planetary Sciences: the study of the planets of the solar system.

Stellar astronomy: the study of the stars.

Stellar evolution: the study of the evolution of stars from their formation to their end as a stellar remnant.

Star formation: the study of the condition and processes that led to the formation of stars in the interior of gas clouds, and the process of formation itself.

Also, there are other disciplines that may be considered part of astronomy: