Did you know that Jupiter officially has the most number of moons, 63 to be precise. The four most famous (and largest) moons of Jupiter are called the Galilean moons as they were first discovered by Galileo. It should be noted that only 49 of these moons of Jupiter have an official proper name. Saturn officially has 60 moons, and 52 of those have official proper names. These numbers are likely to change, especially as more data from the Cassini spacecraft are analyzed by scientists. Also, if astronomers ever change the official definition of “moon,” there will be an upheaval of these numbers.
Did you know that your mass is the same no matter what planet you are on? However, your weight, which is actually not the same as mass, is different on each planet depending on the planet’s gravitational acceleration. Thus, if you weighed 100 pounds here on Earth, you would weigh about 38 pounds on Mercury, 91 pounds on Venus, 38 pounds on Mars, 250 pounds on Jupiter and 110 pounds on Neptune. If you were curious about how much you might weigh on some of the so-called dwarf planets, a 100 pound person would weigh only 3 pounds on Ceres, 8 pounds on Pluto, and 9 pounds on Eris.
Did you know that the neutrino is a fundamental particle produced by hydrogen fusion in the core of stars? In fact, it is estimated that the Earth receives from our Sun about 40 billion neutrinos per second per square centimeter. If you think that sounds like a large amount, it is estimated that about 100 times that amount are passing through you and me right now, and that the origin of these neutrinos is from the “big bang” origin of the universe itself. If you do the math, you should estimate that there would be about 330 neutrinos in every cubic centimeter of the universe, if all of the neutrinos were spread out evenly in our universe. Learn more about neutrinos online at http://www-donut.fnal.gov/web_pages/neutrinospg/Neutrinos.html Learn more about solar neutrinos online at http://www.chemistry.bnl.gov/SciandTech/SN/default.htm