1.   Gravitational Force    Nature   Problems  Your Weight on Planets  

2.  Newton's Law of Universal Gravitation 

3.  "g"  Acceleration due to gravity        Calculate using a Pendulum, String, and a Watch


4. Moon Phases   Moon on a Date    Moon Phases Animated            Current Moon Phase

Lava Flow Hadley

5. Tides  See Page:Tides Quest to study Tides

Earth in Space 

6.  Earth's Seasons  

7.  Eclipses  

Pathway of Eclipse ASE2012pp2b.JPG Coming  Solar  & Lunar Eclipses 


8.  Our Planets     Atmospheres Aplet     Welcome to the Planets

ht_earth_kepler_20f_dm_111220_wg.jpgTwo Earth-sized Planets Orbiting a distant star  Dec 20 2011
shows motions of planets according to mass and distance.  You set the variables. Simple, yet has directions and simulations set to go.  DOWNLOAD
classfplanetVega.jpgExtrasolar Planets


9.  Sun's Structure    The Sun as a star



How Astronomers know anything See Page: How Scientists know about the Universe   DopplerDevice - a demo

Spectra        Stellar Spectra            Detecting Star Composition by it Light

Spectra ID Lab
NaKr.jpg MVC-008F.JPG HHe.jpg

Telescopes         Explore the Universe -Smithsonian     X-rayChandra

Visit a working telescope - the biggest mainland US at 200 inches - Mt. Palomar Carnegie Institution of Washington builds Great Observatories The James Webb replaces Hubble & Current Methods


Star Formation, Life & Death       Page: Stellar Evolution

mass affects star's future
How mass changes a star's fate - shown in HR diagrams

Galaxies, Black Holes, ...

View of black hole
Black Hole views

 Origin of the Universe





Ask a NASA Scientist  - welcomes questions about X-ray, gamma-ray, and cosmic-ray
     astrophysics: the objects and processes that produce high energy radiation and particles, and the technology used to detect them.

Where is our Space program? - Given up?

   Links:  Sky & Telescope Magazine - the standard