Discoverer: named after Edmund Halley opening date: 1758 (first predicted perihelion) Alternate designations: comet Halley (Halley), 1P Orbital characteristics: Age: 2449400.5 (17 February 1994) Aphelion: 35.32.e. Perihelion: 0.586.e. The semi-major axis: 17, 8 and.e. The eccentricity repulsed: 0, 967 Orbital period: 75, 3 and the Inclination of the orbit to the Ecliptic plane: 162, 3 degrees Last perihelion: 9 February 1986 Next perihelion: 28 July 2061 g the Period of revolution around the Solar system: from of 74.4 to 79.2 years. The average value of 76 years. Thanks to a successful “visits” in 1986 to comet Halley spacecraft “VEGA-1 and VEGA-2” (USSR) Giotto (ESA), “Suisei” and “Sakigake” (Japan) scientists got the first pictures of the core and comprehensive information:
a summary of other presentations about the sky
“School of astronomy” – Observation – the basis of astronomy. Major achievements in space exploration. Observation of solar Eclipse on 1 August 2008. Our Galaxy Is. Continue reading
Astronomer Fyodor Bredikhin was born in 1831 in the city of Nikolaev in the ancient noble family.
To 14 years Bredikhin was home-schooled – in the estate of her father Colonie near Kherson. Then was sent to boarding school at Richelieu Lyceum in Odessa, and four years later transferred to the Lyceum. However, studying in the lycée he did not like, and in 1851 he transferred to Moscow University physico-mathematical faculty.
Bredikhina was interested in physics, but, obeying the fashion of those years, he intended to follow in the footsteps of his father and uncle, that is certainly to enroll in the naval service or in the artillery. Only in the last year after practical work in the Observatory Bredikhin became interested in astronomy.
In 1862 he defended his master’s thesis “On the tails of comets”. This study as would be anticipated the main direction of its future work in astronomy.
In 1867 Professor Bredikhina was granted planning a business trip. Good knowledge of the language enabled him, while in Italy, to be familiar with the works of the Society of spectroscopy. Many Italian researchers have become his friends, including the famous discoverer of the “canals” of Mars the astronomer Schiaparelli. Continue reading
Periodic comet attracted by the Sun, sent to him, but pass due to the same sensitivity to the solar wind, which causes the surrounding cloud of dust and gases blown away from the Sun. People believe that the tiny particles of solar wind will impact more than large particles, but this assumption is wrong. If this were so, then how to explain the continued existence of the Asteroid Belt, which includes debris of any size is not affected, apparently, by the solar wind. The small object may lose velocity faster than the larger object because of differences in gravity, but if they are sensitive to solar wind, it occurs the same effect, – they are repelled equally. The comet, which (eventually) reach the Sun, with a very repeatable trajectory around the Sun, losing a lot of water vapor so that the ratio of substances in their composition is aligned at the expense of pushing away by the solar wind. In short, they lose their cover. They fly up with acceleration from the external space, but at this time do not change direction, going outside, and face (with the Sun). In fact, comets complete their orbits, coming nearer in the process, getting closer and closer to the Sun. Continue reading