Vaporization produces high pressure, which forces the gas through fissures in the
Will Pluto and Neptune ever collide?
Even though their orbits appear to cross, Pluto and Neptune are in no real danger of
colliding with each other.
Because of the or
The planet Uranus was discovered by British astronomer William Herschel in 1781.
He came across the planet by accident, first labeling it as some sort of star or comet.
After repeated observations
-he realized that it was neither and that he had found the
What is responsible for the colors of Uranus and Neptune?
Increasing amounts of methane are largely responsible for the planets blue coloration
or Uranus and Neptune.
Methane absorbs red light efficiently, so the sunlight reflected from the planets
- Any piece of interplanetary debris that survives its fiery passage through our
atmosphere and finds its way to the ground
-or shooting stars, are bright streaks of light that flash across the sky as meteoroids
or pieces of interplanet
How do we know what comets are made of?
In seeking the physical makeup of a cometary body itself, astronomers are guided by
the observation that comets have dust that reflects light and also certain gas that
emits spectral lines of hydrogen, nitrogen, car
The hot dayside temperaturesand cold nightside temperatures on the Moon and
Mercury result from the absence of significant heat conduction and or atmospheric
Impact Theory in fact postulates a collision by a large Mars-sized object with a
GH Effect Harmful:
It is helpful to an extent because without it, there would not be liquid water on Earth,
which is critical for the existence and survival of life.
if the greenhouse gas levels in fact rise unchecked the consequences could be
Evolution of life might have come to a halt due to extreme changes or it could have
allowed for beneficial changes that could not have occurred without such a drastic
altering in Earths orientation.
The Moons escape speed is only 2.
4 km/s and Mercurys es
Traveling in a highly elliptical orbit with the Sun at one focus,
-a comet brightens and develops an extended tail as it near the Sun.
As the comet departs the Suns vicinity, its brightness and tail diminish until it once
again becomes a faint point of li
Venus craters are generally circular, except for those less than 15km in diameter,
those can be asymmetric in appearance.
Geologists believe there is a region that surrounds the impact crater known as the
- material ejected from the crater