Astronomy (from Greek: ἀστρονομία) is a natural science that studies celestial objects and phenomena. It applies mathematics, physics, and chemistry, in an effort to explain the origin of those objects and phenomena and their evolution. Objects of interest include planets, moons, stars, galaxies, and comets; the phenomena include supernova explosions, gamma ray bursts, and cosmic microwave background radiation. More generally, all phenomena that originate outside Earth's atmosphere are within the purview of astronomy. A related but distinct subject, physical cosmology, is concerned with the study of the Universe as a whole. Astronomy is one of the oldest of the natural sciences. The early civilizations in recorded history, such as the Babylonians, Greeks, Indians, Egyptians, Nubians, Iranians, Chinese, Maya, and many ancient indigenous peoples of the Americas performed methodical observations of the night sky. Historically, astronomy has included disciplines as diverse as astrometry, celestial navigation, observational astronomy and the making of calendars, but professional astronomy is now often considered to be synonymous with astrophysics. Professional astronomy is split into observational and theoretical branches. Observational astronomy is focused on acquiring data from observations of astronomical objects, which is then analyzed using basic principles of physics.
Volcano eruption - lorem ipsum dolor sit amet
Play now!
Volcano eruption

Added 4 months ago by Ayla


nebulosa - nebulosa del granchio
Play now!

Added year ago by carla


galaxy tree - The picture shows a tree against the background of the night sky
Play now!
galaxy tree

Added year ago by Lil

116 1

Swinica at night - A keystone in the main ridge of the High Tatras with two peaks, varying in height by 10 m. The shape
Play now!
Swinica at night

Added year ago by aldona

116 1

solar system - The sun in the center and around the planet. Copernicus once discovered it, nothing but create a puz
Play now!
solar system

Added year ago by julka

221 2

Purple Sky - Purple Sky Wallpaper
Play now!
Purple Sky

Added over a year ago by angel


Manga Anime - Manga Anime Ładny Obrazek
Play now!
Manga Anime

Added over a year ago by Weronika


cicha noc świecą gwiazy - gwiazdy i gwiazdki świecą w nocy
Play now!
cicha noc świecą gwiazy

Added over a year ago by Halinka


Play now!

Added over a year ago by ZOSIA


giuvan palestin - immensità dello spazio, stelle e quanto ltro
Play now!
giuvan palestin

Added over a year ago by giuvuan


galaktyczne puzzle! - śliczne zdięcie (chyba zdięcie)
Play now!
galaktyczne puzzle!

Added over a year ago by Galaxy :3


Mgławica Kraba - Zdjęcia z teleskopu Huble'a
Play now!
Mgławica Kraba

Added over a year ago by 123456789


gwiaździste niebo, wulkan - gwiaździste niebo, wulkan, skały
Play now!
gwiaździste niebo, wulkan

Added over a year ago by Jasmina