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AST 101 Astronomy Study Guide – SBU Exam Review & Revision Notes

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Exam (elaborations)

AST 101 Astronomy Study Guide – SBU Exam Review & Revision Notes

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11 pages

2026/2027

Institution AST 101

Course AST 101

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Prepare for AST 101 Astronomy with this study resource associated with SBU. Designed for students reviewing introductory astronomy concepts, strengthening their understanding of course material, and preparing for assessments. Use this resource to support your revision, review important astronomy topics, and organise your study sessions. Ideal for students searching for AST 101 study guides, astronomy exam review materials, and SBU course revision resources. Course: AST 101 – Astronomy Institution reference: SBU Purpose: Study and exam preparation Format: PDF study material

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AST/./101/./SBU

How/./many/./stars/./are/./in/./the/./Milky/./Way/./Galaxy?/./-/./correct/./answer/./✔
✔ ~100/./billion

What/./is/./our/./galaxy/./called?/./-/./correct/./answer/./✔ ✔
Milky/./Way/./Galaxy

What/./are/./the/./primary/./features/./of/./the/./structure/./of/./our/./galaxy?/./-
/./correct/./answer/./✔ ✔ 1././Disk/./--flat/./structure/./(stars,/./gas,/./and/./dust)/./

2././Bulge/./-/./central/./spherical/./component/./(mostly/./stars)/./

3././Halo/./-/./outer/./spherical/./component/./(globular/./clusters,/./dark/./matter)

What/./is/./the/./motion/./of/./halo/./stars?/./-/./correct/./answer/./✔ ✔
Halo/./stars/./travel/./high/./above/./and/./far/./below/./the/./disk/./on/./orbits/./with/./r
andom/./orientations.

, What/./is/./the/./motion/./of/./bulge/./stars?/./-/./correct/./answer/./✔ ✔
Bulge/./stars/./also/./have/./orbits/./with/./random/./orientations.

What/./is/./the/./motion/./of/./disk/./stars?/./-/./correct/./answer/./✔ ✔
Disk/./stars/./orbit/./in/./circles/./with/./the/./same/./orientation,/./except/./for/./a/./litt
le/./up-and-down/./motion.

What/./is/./the/./importance/./of/./the/./motion/./of/./the/./stars?/./-/./correct/./answer/./
✔ ✔
These/./motions/./support/./the/./structures/./of/./our/./Galaxy/./against/./gravitati
onal/./collapse.

star-gas-star/./cycle/./-/./correct/./answer/./✔ ✔
the/./process/./of/./galactic/./recycling/./in/./which/./stars/./expel/./gas/./into/./space,/
./where/./it/./mixes/./with/./the/./interstellar/./medium/./and/./eventually/./forms/./ne

w/./stars

Atomic-hydrogen/./clouds/./-->/./molecular/./clouds/./-->/./star/./formation/./--
>/./nuclear/./fusion/./in/./stars/./-->/./returning/./gas/./-->/./hot/./bubbles/./--
>/./back/./to/./molecular/./clouds

Where/./does/./gas/./recycling/./occur/./most?/./-/./correct/./answer/./✔ ✔
In/./the/./galactic/./disk.

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Uploaded on: October 12, 2026
Number of pages: 11
Written in: 2026/2027
Type: Exam (elaborations)
Contains: Questions & answers

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