Astronomy Picture of the Day. The Sagan Series. We are listening. Visualizing The Size And Scale Of Our World. Solar System Scope. Cool Technology for Amateur Astronomy. Cool Technology for Amateur Astronomy One of the biggest challenges of astronomy is the whole art and science of learning to find things in the night sky. This can be difficult because tens of thousands of the most interesting things can't be seen with the naked eye!
This poses a challenge but Meade and Celestron have come up with a solution to this problem. They have made it downright easy to enjoy backyard astronomy. These are handheld locators that work off of gps and they each make it easy to point and find anything in the sky. You can select what you want to find and then it will locate it for you or you can point it at something and it will tell you what it is. I have more extensive information on both these amazing astronomy products here Home Planetarium Discovery Exclusive Ultimate Star Childrens Planetarium View the night sky as it would appear anywhere in the world with this motorized indoor planetarium. Imagining the Tenth Dimension - A Book by Rob Bryanton.
Your Age on Other Worlds. Want to melt those years away? Travel to an outer planet! <div class="js-required"><hr> This Page requires a Javascript capable browser <hr></div> Fill in your birthdate below in the space indicated. (Note you must enter the year as a 4-digit number!) The Days (And Years) Of Our Lives Looking at the numbers above, you'll immediately notice that you are different ages on the different planets. The earth is in motion.
The top-like rotation of the earth on its axis is how we define the day. The revolution of the earth around the sun is how we define the year. We all learn in grade school that the planets move at differing rates around the sun. Why the huge differences in periods? Johannes Kepler Tycho Brahe Kepler briefly worked with the great Danish observational astronomer, Tycho Brahe. Here you see a planet in a very elliptical orbit. Kepler's third law is the one that interests us the most. Let's just solve for the period by taking the square root of both sides: Isaac Newton. NASA. The Scale of the Universe 2.