Astronomi (saking basa Yunani: αστρονομία = άστρον + νόμος, astronomia = astron + nomos, "hukum lintang") punika, ngèlmunipun sadaya badan-badan ingkang wonten langit utawi akasa. Ngèlmu punika sampun kina sanget, tiyang-tiyang Yunani kina sampun katarik. Ngèlmu punika wiyar sanget.

Sajarah 
 Sajarah Alam Semesta

Perangkat 
Perangkat utama ngèlmu astronomi iku antarané:
 Teleskop
 Observatorium

Uga delengen 
 Lintang
 Planet
 Tata surya
 Galaksi utawa gugusan Lintang

Pranala njaba 
 Departemen Astronomi Institut Teknologi Bandung 
 Observatorium Bosscha
 Lembaga Penerbangan dan Antariksa Nasional 
 International Astronomical Union
 American Association of Variable Star Observers
 Durham Region Astronomical Association
 National Optical Astronomy Observatories 
 North York Astronomical Association 
 Royal Astronomical Society of Canada
 Royal Astronomical Society (UK)
 Czech Astronomical Society
 Herzberg Institute of Astrophysics 
 Saint Louis Astronomical Society
 Cassini Imaging Laboratory 
 Open Encyclopedia Project

Réferènsi 
 Encyclopedia of Astronomy and Astrophysics  
 Los Alamos Astrophysics e-Print Database
 Astronomy Picture of the Day
 Bruce Medalists (annual astronomical award since 1898)
 Islamic and Arab Astronomy 
 Kamus Istilah Astronomi 

Èlmu
Astronomi
Fisika
Èlmu alam