His first model of the
solar system is
generally seen as the
first step of modern
models. 1473 - 1543
Galileo
He approached questions with
what we call the scientific
method. He made
improvements to the newly
made telescope. 1564 - 1642
Kepler
He is best known
for Kepler's law.
1571 - 1630
Aristarchus
He attempted to measure
the relative distance to the
moon and sun. 310 - 230 BC
Scientist who believe
in Geocentric Models
Aristotle
He thought the relative
position of the stars
moved be the earth. 384 -
322 BC
Ptolemy
Created a geocentric
model of the solar
system that was used
for 14 centuries. 100 -
170 BC
Other Information
parallax
is a displacement or difference in
the apparent position of an object
viewed along two different lines
of sight, and is measured by the
angle or semi-angle of inclination
between those two lines.
AU
A distance used to measure in
space. It is the distance between
the sun and earth which is 150
million km.
Kuiper Belt
a region of the solar system
beyond the orbit of Neptune,
believed to contain many comets,
asteroids, and other small bodies
made largely of ice.
Oort Cloud
is an extended shell of icy
objects that exist in the
outermost reaches of the
solar system.
Comets
an icy body that
releases gas or dust.
Meteors
a small body of matter from outer space
that enters the earth's atmosphere,
becoming incandescent as a result of
friction and appearing as a streak of light.
Rotation
the action of rotating
about an axis or
centre It takes the
earth 24 hours to
rotate around it's axis.
Revolution
an instance of revolving.
The Earth's revolution
around the sun takes
3651/4 days, or one year.
Orbit
is a regular,
repeating path that
one object in space
takes around
another one.
photosphere
the luminous envelope
of a star from which
its light and heat
radiate