Tuesday, February 22, 2011
The core of the comet
The core is the boulders of rocks and ice that lies at the heart of comet. When a comet approaches the Sun, it begins to melt from the heat. From the side facing the Sun jets of gas begin to flow. After that the rock fragments are released and create a tail of dust.
Each comet has a tail of dust and tail of gas. Solar wind throws them back, turning them from the sun.
Every 76 years the Halley comet returns to the center of the Solar System. In 1705th English astronomer Edmund Halley correctly predicted its return to the 1758th. The last time he returned in 1986th. The most common comet is Encke comet, which returns every 3.3 years.
Posted by gabe_logan at 10:06 PM