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Asteroids
These are big rocks that circle the Sun.
Asteroid Belt
The vast majority of asteroids are safely beyond the orbit of Mars in an area.
Ceres
Asteroids range in size from ____, which is 587 miles across, and are merely asteroidal fragments.
Asteroidal meteoroids
These are made of rock and/or iron; when they fall to Earth, they’re called meteorites.
Jupiter Trojans
Asteroids that are trapped in Jupiter’s orbit around the sun.
Ceres
Pallas
Vesta
Hyglea
The “Big Four” of the Asteroid Belt
Ahuna Mons
a mountain on Ceres 11 miles wide ad 2.5 miles high, is a cryovolcano.
Rheasilvia
It is 310 miles wide and about 12 miles deep, with a central peak higher than the Mauna Kea volcano in Hawaii.
Occator
Unusual bright white spots appear on the floor of Ceres’ ____ crater.
Near-Earth objects (NEOs)
Thousands of small asteroids have orbits that cross or approach Earth's orbit.
Minor Planet Center (MPC)
The ________ of the International Astronomical Union keeps tabs on PHAs, and several observatories sweep the skies to discover more of them.
Chicxulub crater
The 110-mile-wide geologic feature, which lies partially on Mexico's Yucatan peninsula and partially offshore in the Gulf of Mexico, may be the last remaining sign of the impact that is thought to have wiped out the dinosaurs.
Flagstaff
An impact by a small asteroid caused the famous Meteor Crater in northern Arizona, near ____
Gravity Tractor
A massive spacecraft would fly along with the asteroid for a period of years.
Occultation
A kind of eclipse that occurs when a moving body in the solar system passes in front of a star.
Binary System
Two stars in orbit around a common center of mass.
Occultation Ground Track
An area of the Earth's surface that is expected to be visible for the occultation, similar to the path of totality during a solar eclipse.
International Occultation and Timing Association (IOTA)
They tells all you want to know about observing occultations.
potentially hazardous asteroids (PHAs)
NEOs are what the astronomers see as the Earth’s neighbors and most of them are identified as _____.
Vesta
It is a surviving example of a protoplanet, which is a stage in the formation of a planet that is just before the formation of a planet.
Note 
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