Our Kepler's Laws simulation lets students visualize “swept area of a planet’s orbit” and its relationship with equal time intervals in the context of Kepler’s second Law.
phet.colorado.edu/en/simulatio...
#Astronomy #GravitationalForce #AvailableInPhETStudio

ROSAT X-ray image (false color) of a galaxy group superimposed on an optical image. The pink nebula shows hot gas confined by gravity, exceeding that of visible galaxies, suggesting the presence of dark matter. This highlights the mystery of dark matter's nature and abundance in the universe.

Astronomy Picture from 04/04/1999

Hot Gas and Dark Matter

Source: https://apod.nasa.gov/apod/ap990404.html


#GalaxyClusters #DarkMatter #XrayAstronomy #ROSAT #SpaceMystery #Cosmology #Astrophysics #HotGas #GravitationalForce

How does gravity control the motion of our solar system? Move the Sun, Earth, Moon and Space Station to see how it affects their gravitational forces and orbital paths in Gravity and Orbits phet.colorado.edu/en/simulatio... #Astronomy #GravitationalForce #edusky