ASTR 102
American Public University System
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LAB 4 ASTR 102
- Exam (elaborations) • 4 pages • 2022
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Lab 4
How Big is our Galaxy?
ASTRO 102
1 Objective
The objective of this lab was to introduce methods that astronomers use to estimate properties of
astronomical objects using observations.
2 Introduction
A variable star is a star whose brightness changes periodically. Variable stars are comprised of two
categories, intrinsic and extrinsic variables. The luminosity of an intrinsic star changes, whereas only the
apparent brightness of an extrinsic star changes due to changes in the amoun...
Exam (elaborations)
LAB 4 ASTR 102
Last document update:
ago
Lab 4 How Big is our Galaxy? ASTRO 102 1 Objective The objective of this lab was to introduce methods that astronomers use to estimate properties of astronomical objects using observations. 2 Introduction A variable star is a star whose brightness changes periodically. Variable stars are comprised of two categories, intrinsic and extrinsic variables. The luminosity of an intrinsic star changes, whereas only the apparent brightness of an extrinsic star changes due to changes in the amoun...
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