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Unit 7: Astrophysics Page 17

dust that make up various magnetic fields are known as

comets and asteroids. magnetars.
2. Two planets have been 10. Black holes are the leftovers
reclassified after astronomers of a BIG star explosion. There is
found out more information nothing to keep it from
about their neighbors. collapsing, so it continues to
3. The sun uses nuclear reactions collapse forever. It becomes so
to generate its energy. small and dense that the
4. The Oort Cloud holds an gravitational pull is so great that
estimated 1 trillion comets. light itself can’t escape.
5. The Kuiper Belt holds the 11. Gravitational lensing occurs
chunks of ice and dust, like when black holes and other
comets and asteroids as well as massive objects bend light.

larger objects like dwarf planets
Eris and Pluto.
6. Galaxies are stars that are
pulled and held together by
gravity.

7. Globular clusters are massive
groups of stars held together by

gravity, using housing between
tens of thousands to millions of

stars.
8. Planetary nebulae are shells of
gas and dust feathering away.
9. Neutron stars are formed from
stars that go supernova, but
aren’t big and fat enough to
turn into a black hole. Pulsars

are spinning neutron stars with
their poles aimed our way.

Neutron stars with HUGE

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