
Glossary for Deep Sky Objects
Flashcard
•
Science
•
6th Grade
•
Practice Problem
•
Hard
Jaime Harper
FREE Resource
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34 questions
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1.
FLASHCARD QUESTION
Front
arms
Back
A pinwheel structure, composed of dust, gas and young stars, that winds its way out from the core of a spiral galaxy.
2.
FLASHCARD QUESTION
Front
barred spiral galaxy
Back
A spiral galaxy with a 'bar' of stars and interstellar matter, such as dust and gas, slicing across its center. The Milky Way is thought to be a barred spiral galaxy.
3.
FLASHCARD QUESTION
Front
black dwarf
Back
The presumed final state of evolution of a low/medium mass star in which no radiation is emitted. There are none of these in the universe yet – it’s not old enough.
4.
FLASHCARD QUESTION
Front
black hole
Back
An invisible region in space, formed from the death of a massive star during a supernova explosion, that has a huge amount of mass compacted into an extremely small volume. A black hole’s gravitational influence is so strong that nothing, not even light, can escape its grasp.
5.
FLASHCARD QUESTION
Front
brown dwarf
Back
A 'failed star'; a giant ball of gas that is too massive to be a planet but not massive enough to be a star. During formation, the protostar didn’t reach the critical mass required to ignite nuclear fusion. It glows briefly, then its energy dies out and emits only infrared radiation.
6.
FLASHCARD QUESTION
Front
central bulge
Back
The spherical structure at the center of a spiral galaxy that is made up primarily of old stars, gas, and dust.
7.
FLASHCARD QUESTION
Front
dark nebula (or absorption nebula)
Back
Dark cloud of dust which is visible only because it absorbs the light of stars behind it.
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