From Stargazers to Starships

Welcome!

 You have reached the homepage of a tutorial exposition focused on 3 topics:
 Also containing A Math Refresher. Helpful Material--hints for users, glossary, questions and answers, two timelines etc. Mainly for Teachers--guide for teachers, problems, inventory of concepts, article about this site. For teachers! A set of lesson plans covering "Stargazers". Link here.
For easier reading, view this site with size 14 font (but print out with size 10 or 12). The material is self-contained, at the high-school level, rich in history and is best studied in the order listed below.

Astronomy of the Earth's motion in space:

1.
The Sky Above Us
1a.Finding the Pole Star
2. The Path of the Sun, the Ecliptic
2a.Building a Sundial
3. Seasons of the Year
4. The Angle of the Sun's Rays 5. Latitude and Longitude
Coordinates
6. The Calendar
7. Precession
8. The Round Earth and Christopher Columbus
Distance to the Horizon
Parallax
How Distant is the Moon?--1
How Distant is the Moon?--2
9, The central role of the Sun
9a.Aristarchus: Is Earth Revolving around the Sun?
9c.Copernicus, Galileo, and the Discovery of the Solar System
10. Kepler and his Laws
11. Graphs and Ellipses
11a.Ellipses and Kepler's First Law
12. Kepler's Second Law
12a.How Orbital Motion is Calculated
.

Newtonian mechanics

13. The Way Things Fall
14. Vectors
15. Energy
16. Newton and his Laws
17. Mass
17a.Mass Measurements aboard Space Station Skylab
17b.Comparing Mass Without use of Gravity
18. Newton's Second Law
19. Motion in a Circle
20. Newton's theory of "Universal Gravitation"
21. Kepler's Third Law
21a.Applying Kepler's Third Law
22. Frames of Reference: The Basics
22a.The Aberration of Starlight
22b. Airplane Flight
23. Frames of Reference: The Centrifugal Force
24. Rotating Frames of Reference in Space and on Earth
.

Elements of algebra

(M-1) Basic ideas
(M-2) How it all started
(M-3) Formulas
(M-4) Identities
(M-5) Deriving Approximate Results

Elements of trigonometry

Questions and Answers by users of "Stargazers".
Hints to users.
A Glossary of Terms(Cross-linked, keyed to the text)
Timeline (A chronology).
Annotated Timeline (With added dates from history). .
Of special interest to teachers:

From Stargazers to Starships follows an earlier site The Exploration of the Earth's Magnetosphere. Stargazers deals with the world of gravity--of massive planets and stars, and the way spaceflight is achieved despite their strong pull. "Exploration" on the other hand looks at the hot (but usually rarefied) gases which fill most of space, which are ruled by magnetic and electric forces rather than by gravity. The polar aurora, the radiation belts, the solar wind, magnetic storms, "space weather", cosmic radiation--this is the site which tells you all about them.

Author and Curator: David P. Stern
NASA/GSFC Code 695

Web Design: Conway Carter
Image Editing: Eddie Welker

Last updated: 14 July, 1999