Astronomy in ancient China We know little about astronomy in ancient China. However, it is known that it is older than Western astronomy and that, being so far from it, it had a totally independent development. The ancient Chinese stellar astronomy differs greatly from the Babylonian and the Western.
The image shows one of the two large observatories that exist in the Canary Islands, the Teide Astronomical Observatory, also known as the Izaña Observatory, as it is located in this unique place of the same name on the island of Tenerife. Located at 2,400 meters of altitude, it was inaugurated in 1964, belongs to the Canary Islands Institute of Astrophysics and has several telescopes belonging to different international institutions.
Ganymede is the largest satellite in Jupiter and the largest in our solar system. If Ganymede orbits the sun instead of Jupiter, it could be classified as a planet. In this image its diameter is compared with that of other bodies of the Solar System, among which are two planets, Mercury and Pluto.
Many people have heard a sonic explosion, but few have seen it. When a plane travels at a speed greater than that of sound, the sound waves emitted by the plane cannot precede it and then accumulate like a cone behind the plane. When this shock wave passes, a spectator will hear a sound, a sonic explosion.
The Swirl Galaxy is a classic spiral galaxy. Only 23 million light years away and with a total width of 65 thousand light years, the M51 also known as NGC 5194. It is one of the brightest and most picturesque galaxies in the sky. The smaller galaxy that appears below and to the left is far behind the M 51, as can be deduced by the dust of an arm in the foreground spiral, which is blocking the light of this smaller galaxy.
If it ever happens that the entire Milky Way seems to collapse on your head, don't despair. This happens twice a day. When in the East the Sun rises, the wonders of the night sky become less bright than the sunlight scattered by the Earth's atmosphere, so they pale and eventually disappear from our sight.