Astronauts Begin Final Spacewalk To Repair Hubble 94
Posted
by
CmdrTaco
from the wave-while-you're-up-there dept.
from the wave-while-you're-up-there dept.
An anonymous reader writes "Astronauts John Grunsfield and Andrew Feustel began the fifth and final spacewalk of their Hubble Space Telescope repair mission this morning at 8:20AM. During their spacewalk the two will install the second battery group replacement in an equipment bay above the Wide Field Camera 2 and next to the compartment where the first battery set was installed on the second spacewalk. Each of the battery module weighs 460 pounds and contains three batteries. The batteries provide electrical power to support Hubble's operations during the night when there's no sun to power the solar arrays."
Re:The batteries weigh what? (Score:3, Funny)
Or you could say "the batteries have a mass of <whatever> kilograms"
Because no one would have a clue WTF the Imperial unit of mass is.
Can't wait for the Duracell commercial... (Score:5, Funny)
"If you think all batteries are the same, consider this: when NASA decided to install new batteries on the Hubble telescope, they trusted duracell. So whether it is for powering your vibrating inflatable girlfriend or charge a two-billion dollar space telescope, it just has to work.
Duracell. Trusted everywhere."
Re:Astronaut helmet cams (Score:5, Funny)
That's the only thing holding you back?
Re:The batteries weigh what? (Score:4, Funny)
Re:The batteries weigh what? (Score:3, Funny)
According to my back-of-an-envelope calculations, I get their true weight to be 1729N.
F=GMmr^-2
=G * Mass of earth * mass of box * (Earth's radius + Hubble orbit height)^-2
=(6.67x10^-11 * 5.9742x10^24 * 208.7) * ((6378 + 559)x10^3)^-2
=1729.20 N
Ah, but I see you failed to calculate the mass of your envelope...
Re:The batteries weigh what? (Score:4, Funny)
The Hubble has replaceable batteries (Score:3, Funny)
but the ipod and iphone can not?