PV Gap

Tony Said:

How do I make a 3-D solar system model spin?

We Answered:

if you want to make revolution and rotation both then it is very difficult
but if you just want to revolve the planets then i can try to help you.

take sun bigger...
smaller planets
arrange them accordingly
just make two small wheels to all the planets and tie the planets to the sun with the help of thin metallic rod.
now arrange the rods in the way they do not intersect eachother.and put the motor with different gear mechanism according to the speed of the planets...
your model is ready....

Don Said:

Which of the following describes our current solar system model?

We Answered:

B.planets revolve around a star and moons revolve around planets

Ross Said:

What advances in technology allowed for the solar system model to be changed from Geocentric to Heliocentric?

We Answered:

For many thousands of years, humanity, with a few notable exceptions, did not recognize the existence of the Solar System. People believed the Earth to be stationary at the center of the universe and categorically different from the divine or ethereal objects that moved through the sky. Although the Greek philosopher Aristarchus of Samos had speculated on a heliocentric reordering of the cosmos, Nicolaus Copernicus was the first to develop a mathematically predictive heliocentric system. His 17th-century successors, Galileo Galilei, Johannes Kepler and Isaac Newton, developed an understanding of physics which led to the gradual acceptance of the idea that the Earth moves around the Sun and that the planets are governed by the same physical laws that governed the Earth. In more recent times, improvements in the telescope and the use of unmanned spacecraft have enabled the investigation of geological phenomena such as mountains and craters, and seasonal meteorological phenomena such as clouds, dust storms and ice caps on the other planets.

Hector Said:

Looking for an online solar system model?

We Answered:

http://www.fourmilab.ch/cgi-bin/Solar