Today
we know that planet forming is in a rapid mode of 1 to 10 million years on a
star. From a distance of 1.400 light years in the constellation Orion,
Venezuelan and American astronomers from the Yale university made a discovery of
168 new born young stars. The new born stars in Orion are about 1 to 10 million
years of age and have a ring of gas and dust for creating planets. The older
stars don't have any rings at all, which means a much faster forming of planets.Astronomers witnessed a spectacular event in July 1994, when 21
fragments of a comet named Shoemaker-Levy 9 crashed into Jupiter's atmosphere.The
Galileo spacecraft's 14-year old mission came to an end
on Sunday Sept. 21, when the spacecraft passed into
Jupiter's shadow then disintegrated in the planet's dense atmosphere at 11:57
a.m. Pacific Daylight Time.
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A telescope or binoculars is all you need for
observation of the Jovian system, the four great moons IO, Europe, Ganymedes
and Gallisto . The Great Red Spot on Jupiter, an eye shaped cloud, that
varies between 24,000 Km and 50,000 Km in length in the South Tropical zone
in The South Equatorial Belt . Jupiter its diameter is 142, 200 Km which is
about one tenth of that of the Sun . Jupiter's atmosphere is not much
deeper than the atmosphere of the Earth , beneath it lies a Sea of liquid
hydrogen about 24,000 Km or 15,000 miles deep. Jupiter
and the other gas planets have high velocity winds which are confined in
wide bands of latitude. The winds blow in
opposite directions in adjacent bands. Jupiter is one of the most popular
planets for observation with a telescope. The planet Jupiter is not a rocky
world like the planet Earth, Jupiter is a huge ball of liquid hydrogen.
Jupiter is more a Sun like composition than it is like the planet earth.The
temperatures in Jupiter's atmosphere are very cold ranging from -130°C at
the top of the clouds to 30°C about 70km below. The names of all of
Jupiter's satellites come from mythological lovers of Jupiter, except
Amalthea who was his nurse. Io, the closest of the four large moons to
Jupiter, is the most fantastic. Because of tidal forces of Jupiter and the
other moons the surface moves in and out by some 100 metres. This generates
a lot of heat which causes a peculiar form of vulcanism in which volcanoes
emit fountains of sur magma. Several of these volcanoes were seen in
eruption by the Voyager probes. Jupiter’s rapid spin rate combined with its
core of metallic hydrogen gives the planet an extremely strong magnetic
field.
