Newton
What Is The Geocentric Model Of The Universe?
The geocentric model of the universe, in which the Sun, planets and stars revolved around the Earth, was the accepted…
Astronomy Cast Ep. 356: Rotational Inertia
An object at rest stays at rest, and object in motion tends to stay in motion. This is inertia, defined…
Why Einstein Will Never Be Wrong
One of the benefits of being an astrophysicist is your weekly email from someone who claims to have “proven Einstein…
Christie’s to Auction off 1st Edition Works by Newton, Galileo
[/caption]It's too bad that they missed Black Friday, but you'll at least be able to get a few gifts for…
What is a Joule?
When we raise an apple up to a height of one meter, we perform approximately one joule of work. So…
Gravity Formula
The gravity formula that most people remember, or think of, is the equation which captures Newton's law of universal gravitation,…
Gravity Equation
There is not one, not two, not even three gravity equations, but many! The one most people know describes Newton's…