satellite
gregladen | November 10, 2013He who lives by gravity shall die by gravity. That's what they say in the gravity biz, anyway. GROCE is the European "Gravity field and steady-state Ocean Circulation Explorer" Satellite which is a flying spacxe robot that has done some amazing research:
GOCE has a gradiometer with three accelerometers to measure gravity very accurately, to the level of 1 in 10^12th of Earth's gravity. In other words, if an X went to within Y meters of the detector, the detector could tell based on X's gravity. I'm not sure what X and Y are (I'm hoping someone who knows will fill in the blanks for us) but…
esiegel | April 22, 2008As you may have noticed from yesterday's unusual post, today is Earth Day! I thought I'd share with you some of my favorite pictures from space of it, including the famous photograph from Apollo 8 known as Earthrise:
This combination shot made from NASA’s Terra satellite and NOAA’s Geostationary Operational Environmental Satellite:
The known satellites at least 0.1 meters in size in orbit around Earth (there are ~11,000 of them as of April 2005, and another 100,000 between 1 cm and 10 cm in size):
Looking at the Earth and the docked Space Shuttle from the International Space Station:
And…