Earth and Mars

International SpaceStation Virtual Tour

 Float through the ISS and watch videos to learn about the space station.

Mars Billion-pixelview from Curiosity

Beautiful panoramas of the red planet.

 Virtual tour of a possible Mars colony.

Curiosity Explores Mars

Food in Space

http://www.nasa.gov/vision/earth/everydaylife/jamestown-needs-fs.html

https://airandspace.si.edu/exhibitions/apollo-to-the-moon/online/astronaut-life/food-in-space.cfm

http://www.nasa.gov/audience/forstudents/postsecondary/features/F_Food_for_Space_Flight.html

http://usatoday30.usatoday.com/tech/science/space/story/2012-07-22/nasa-mars-food-menu/56367970/1

http://www.eater.com/2015/9/17/9338665/space-food-nasa-astronauts-mars 

MERCURY AND VENUS

List of Missions to Mercury and Venus
 http://www.planetary.org/explore/space-topics/space-missions/missions-to-venus-mercury.html

Messenger mission to Mercury
https://www.nasa.gov/mission_pages/messenger/main/index.html

Missions to Venus
Mariner 2
Russian Landings on Venus

Origin of the Solar System

This astronomy course from the University of Tennessee, Knoxville, has a great explanation of the birth of the solar system.

Explore the Solar System

NASA's Eyes on the Solar System is a terrific 3-D simulation with planets, moons, and spacecraft.
Several free downloads can be found here.