The word terrestrial derives from the Latin word terra, meaning land or earth.
Pluto is closer in mass and radius to the terrestrial planets.
It also is:
predominantly rocky, has a solid surface, has a slow rotation, has a weak magnetic
field, has few moo
Astronomers build larger telescopes,
-because they have a greater collecting area and finer angular resolution.
Advantages of reflecting telescopes over refractors:
(1) a reflecting telescope uses a mirror to focus the incoming light, relying on
It was struck by a large body and slowed the rotation of the planet to near zero.
This, as well as the south pole being flipped to the north and visa versa.
How did radio observations of Venus made in the 1950s change our
conception of the planet?
Why is opposition the best time to see Mars from Earth?
Opposition is when Mars is closest to us.
It is then that we see it as full, so that the Suns light strikes the surface almost
vertically, casting few shadows and preventing us from seeing any topogr
. Multiwavelength observations can complement one another, greatly extending
our perception of the dynamic universe around us.
The solar system consists of the Sun and everything that orbits it, including the
nine major planets, the moons that orbit them,
What information might absorption lines in the spectrum of a star reveal about
a cloud of cool gas lying between us and the star?
When cool gas is placed between a source of continuous radiation and a detector,
the resulting spectrum consists of a continu
Geologists believe there is a region that surrounds the impact crater known as the
ejecta blanket- material ejected from the crater following the impact.
Meteoroids may cause this,
-because as they enter into Venuss dense atmosphere, they tend to break ap
One reason that there isnt a:
significant greenhouse effect to warm Mars surface is that due to the cold
temperature that planet keeps year round, the carbon dioxide either leaves the
atmosphere or is absorbed into its surface.
Secondly the small size of
spectrum in which the radiation is distributed over all frequencies, not just a few
specific frequency ranges.
A prime example is the blackbody radiation emitted by a hot, dense body.
the spectrum in which dark ab
The milky band of the light of the Milky Way which is visible on incredibly dark nights
away from light pollution consists of many stars that are so faint they cannot be
individually picked out.
Describe the major large-scale surface features of Mars.
Major Large-Scale Features of Mars:
- three of them are found on the Tharsis buge.
They are shield volcanoes sitting atop the underlying Martian mantle.
They are very tall due to the plane
Mystery 8: Where do Stars Come From?
The space between stars is not empty.
o The interstellar medium is comprised of gas (99%) and dust (1%)
o The density of the interstellar medium almost NOTHING. 1 atom per cubic
Compare: 2.4 x 10^19 molecul
MYSTERY 6: WHAT IS HAPPENING TO NEUTRINOS FROM THE SUN?
Our sun is an average sized star.
The sun is powered by nuclear fusion that ultimately results in the release of neutrinos
and gamma rays.
o How could we have ultimately proved the occurrence of nucl