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small body of ice, rock and small dust that follows an elliptical orbit around the sun.
What are comets?
swarms of meteors
What are meteor showers?
Asteroids in the orbits of Jupiter and Neptune
What are trojan asteroids?
second tail made of dust and gas curves backward along the comet's orbit. The dust tail can be millions of kilometers long.
What is a dust tail?
January 3
When is the peak date of the meter shower Quadrantids?
the largest asteroids
What are planetoids?
they take less than 200 years to orbit the sun
short period comets
meteorites that resemble the rocks of the earth.
What are stony meteorites?
the discoverer of asteroid Ceres
Who is Giuseppe Piazzi?
the element that mainly comprises Comet Hale-Bopp
What is Argon?
the most famous comet that orbits the sun every 75 years.
what is Halley's comet?
chondrite and achondrite
What are the classifications of stony meteorites?
Other term for asteroids
What are minor planets?
Eta Aquarid and Orionid
What are the two meteor showers that originate from the remnants of Halley's comet?
sphere surrounding the solar system where some comets come from
What is the Oort cloud?
discoverers of comet Hale-Bopp
Who are Alan Hale and Thomas Bopp?
December 10-15
When can we annually witness the Geminids Meteor shower?
discoverers of unusual concentration of Iridium in different parts of the world
Who are Luis and Walter Alvarez?
the process behind the similarity between the layers of the earth and the types of meteorite
What is the gravitational differentiation of planets