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Physics
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Definitions - space
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Cards (13)
Comet
A
celestial
object consisting of
ice
and
dust
and, when near the sun, a ‘tai’ of gas and dust particles pointing away from the sun
Elliptical
An
oval shaped
orbit
Galaxy
A collection of
millions
or
billions
of
stars
Gravitational field strength
The
strength
of
gravity
on a planet or moon. The greater the
mass
of the planet the greater the
gravitational field
Milky
Way
Our
galaxy
Moon
A ball of
rock
that
orbits
a planet. A
natural satellite
Orbit
The regularly
repeated
elliptical
course of a
celestial
object or
spacecraft
about a
star
or
planet
Orbital speed
The
speed
at which an object
orbits
a
planet
or
star
Satellite
An artificial or natural body placed in
orbit
round the
earth
or another
planet
in order to collect
information
or for
communication
Solar
system
The collection of
eight
planets
and their
moons
in
orbit
round the
sun
Star
A star is a
celestial
body
that consists of a
luminous
sphere
of plasma held together by its own
gravitational
field
Time period
The time for
one
complete
orbit
Universe
A
collection
of
billions
of
galaxies
