orbital mechanics
which law is it? planets sweep out equal areas in equal times
keplers 2nd law
briefly explain general relativity.
einsteins theory of gravity which thought of gravity as a byproduct of the placement of energy and mass in spacetime. energy and mass bends spacetime.
how many successful manned missions to the moon were in the apollo program?
apollo 11, apollo 12, apollo, 14, apollo 15, apollo 16, apollo 17.
6 total missions
how many earths can we place inside the sun?
what is kinetic energy vs potential energy
kinetic energy is because of objects speed, while PE is because of its position
what is the difference between a barycenter and center of mass
they are the same thing
the law that describes galaxies and other things in the universe are moving away from us
hubbles law
What was the first probe to land and transmit data from Venus?
Venera 7
what is a theoretical thing in space that can not be entered, but mass , light and information can escape
white hole
what is newtons law of gravitation
F= GmM/r^2
what are lagrangian points
semi stable positions in a orbit. after you get there, you tend to stay there
the distance at which an object will get disintegrated from the larger object's tidal forces
roche limit
Opportunity
how do black holes lose mass?
emitting hawking radiation through quantum tunneling, this causes black holes to "evaporate"
Einstein won the nobel prize for this discovery (not his work in general relativity)
photoelectric effect
what is hohman transfer
easiest way to increase orbit. uses a burn which places spacecraft in a elliptical transfer orbit, then flipping and doing a retrograde burn, decreasing the v to parking orbit
1.4 solar masses for a white dwarf
chandrasekhar limit
how many years did skylab remain in orbit
6 years
what is semi major axis of neptune's orbit
30.1 au
what is ultraviolet catastrophe
sir raleigh attempts to predict blackbody radiation and fails.
what is virial thoereom
in a circular orbit, E=k+u
e=total energy, k=kinetic energy, u=gravitational potential energy
what is albedo
amount of light reflected back into space
who murdered the nasa constellation program
obama
what is apollo applications project
a nasa program to use apollo designed hardware for other stuff. led to skylab project
why did einstein add cosmological constant
he was dissatisfied that otherwise his equations did not allow for a static universe