Space Flashcards
A projectile is
an object that is only subject to the force due to gravity.
A projectile moves with
- constant horizontal velocity
- constant vertical acceleration
projectile motion horizontal
there are no horizontal forces, so horizontally we move at a constant velocity
Vh = S/t
velocity= horizontal displacement/time
projectile motion vertical
only weight acts as a force vertically, so vertically we travel with constant acceleration.
Vv= Uv + at
vertical velocity= initial Vv +
acceleration x time
Planet
a large object in space that orbits a star and
doesn’t produce light of its own.
Moon
natural satellite of a planet, reflects light from a star.
Sun
a star - the one in the centre of our Solar System.
Star
a large ball of gas, that emits light energy because the gases fuse together.
Asteroid
Asteroids are small, rocky objects that orbit the sun. Although asteroids orbit the sun like planets, they are much smaller than planets.
Solar system
the collection of 8 planets, moons, asteroids and comets that orbit our Sun.
Dwarf planet
small planetary-mass object that is in direct orbit of the Sun – something smaller than any of the eight classical planets, but still a world in its own right. E.g. Pluto
Exo-planet
a planet that orbits a star outside our solar system
Galaxy
billions of stars that come together due to the force of gravity.
Universe
space and all the matter and energy in it
For an exoplanet to support life it needs
- a breathable atmosphere
- liquid water.
