Planetoid 3753 Cruithne – Discovered in 1986
Planetoid 3753 Cruithne – Discovered in 1986. Its the so-called quasi-moon. Its orbit is irregular and resembles a horseshoe shape. The full trajectory lasts 770 years. In less than 3000 years, the asteroid may collide with Earth. He approaches our planet for a minimum distance of about 15 million. km. The last such approximation took place in 1900, the next one will be in 2285. If this does not happen, Cruithne is in danger of collision with Venus in 8,000 years. In the vicinity of Earth there are also two other quasi-moons named 2006 FV35 and 2010 SO16. Humanity has not come up with an effective way to prevent the possible collision of asteroids with Earth.
Measuring asteroids – Shape and size
Measuring asteroids – Shape and size – French scientists from the Observatoire de la Cote d’Azur have developed a new way of measuring the shape and size of asteroids. They used an interferometer constructed of 2 VLT telescopes, with diameters of 8.2 m. To measure the asteroid Barbara. The results indicate that the asteroid is composed of two parts with a diameter of 37 and 21 km. Apart from each other 24 km.
Space probe Galileo Jupiter
Space probe Galileo Jupiter – In October, 1989. Space shuttle Atlantis took into space probe Galileo. Did not move out of orbit straight to Jupiter, but first flew in the direction of Venus, which was used to assist gravity. In the same order twice used the Earth and finally moved toward the gas giant. Along the way, the first probe approached asteroid, specifically Gaspra, a distance of 1600 km.
Galileo probe to Jupiter was heard after 7 years and accompanied him the next 8. It became his artificial satellite. Among other things, sent into the atmosphere of Jupiter measuring instrument, which in hellish conditions lasted almost an hour. Several times flew near the Galilean moons: Io, Ganymede, Europa and Callisto. Discovered that beneath the surface of the last three is salty ocean water.
Due to the good operation of the systems, the probe mission was extended several times (the last time – at the end of April 2001.). Made a total of 34 laps around Jupiter. At that time, 7 times visited Io, Callisto 8 times, as many times Ganymede, 11 times Europe.
Phobos – One of the two moons of Mars
Phobos – One of the two moons of Mars resembles its shape potato cratered. Red Planet caught the flying asteroid and made it their satellite. Phobos looks like it went through a herd of worms, because the inside is full of holes. The object awaits the sad fate of Mars, Phobos still draws closer and for approx. 50 million years, tidal forces of Mars moon tear to shreds. Thanks to the Red Planet will become a decoration in the form of a ring.