Astronomy For Beginners
A blog to indulge two greatest interests - amateur astronomy and the internet.
Fact1: A comet is a conglomerate of particles bound together by ice (not necessarily H2O water ice, it could be dry ice (CO2), for example)
Fact2: When a comet approaches the sun the ice melts and releases the particles from the main body.
Fact3: The tail of a comet always points away from the sun.
As the picture below shows, there are in fact two tails, both curved, and they are 30 MILLION kilometres long. That's a lot of fine particles. The theory is that the solar wind is responsible for the blue gas and gravity alone for the larger particles.
More interesting cosmological facts will unfold at Astronomy For Beginners