The Devil Comet” — a rare galactic phenomenon the size of Mount Everest that can only be seen by humans about every 70 years ...

In 1986 Louis Frank, a physicist from the University of Iowa, suggested that each year Earth is bombarded by ten million house-size mini-comets weighting up to 40 tons (36 metric tons) each.

It was a much larger comet than Hyakutake, but, because it did not pass near the earth, it did not have so great an apparent size. This image was a 6-minute exposure on Fuji Super G 800 using a 500 mm ...

"We found that some comets in the inner Oort cloud form a long-lasting spiral structure." Spirals are a repeating theme in astronomy, with arguably the most famous example of a swirling armed ...

Careful analysis of a Hubble Space Telescope image indicated that reason for Hale-Bopp's brightness was its exceptionally large size. The nuclei of most comets are about 1-2 miles across.