Ready References
A Guide to Backyard Astronomy
Spectral Types of Stars
The Stellar Magnitude System
Making Variable Star Observations
Hands-On Astrophysics (HOA)
Notes on the Materials of Research
Starting a Rock Collection
(2000).iso/amsci01/images/info24.jpg)
Ready References A Guide to Backyard Astronomy Spectral Types of Stars The Stellar Magnitude System (2000).iso/amsci01/images/observ24.jpg)
Making Variable Star Observations Hands-On Astrophysics (HOA) (2000).iso/amsci01/images/construct24.jpg)
Notes on the Materials of Research Starting a Rock Collection