mr phan phan phan 1 mor monthh

rocket

device that expels gas in one direction to move the opposite direction.

thrust

reaction force that propels a rocket forward.

velocity

speed in a given direction.

orbital velocity

velocity an object must achieve to establish and orbit around earth.

escape velocity

velocity a rocket must reach to fly beyond a planet’s gravitational pull.

satellite

object that revolves around another in space.

space shuttle

spacecraft that can carry a crew into orbit, return to Earth, and

then be reused for the same purpose.

space station

large artificial satellite on which people can live and work for long periods.

space probe

spacecraft that carries scientific instruments that can collect

data, but has no human crew.

rover

Some probes have small robots that move around on the surface. A rover typically has instruments that collect and analyze soil and rock samples.

sputnik I

soviets first satellite, began space race.

Laika

first living creature sent to space. (dog)

John Glenn

first american to orbit earth in the friendship 7

Friendship 7

rocket where John glenn was on during his first trip.