Do alien life form exit? Are they intelligent? Do they posses technologies that we never dreamed off? These are some of the questions that would have passed through our mind at least once in a lifetime.
Humankind’s thirst for knowledge,and curiosity has rewarded with him ground-breaking technologies and innovations.He has unraveled many secrets of the universe, like finding Earth like planets,predicting age,shape,fate through theories and explanations.But the only thing we have yet to find out is life form other than our own.
Enter,the Voyager probes,two of them-Voyager 1,Voyager 2.Voyager 1 was launched in September 5,1977 but surpassed it’s successor,Voyager 2,which was launched on August 20,1977.
Voyager 1 was lifted off with a Titan III E rocket.The primary mission was to encounter outer planets such as Jupiter & Saturn .
Voyager missions also laid emphasis to study the moons of both planets ans the significant discovery was the volcanic activity in IO.(one of the moon of Jupiter),and predicting life supporting conditions in the moon of Saturn:TITAN(Read more on the link) ,using remote sensing methods.Even after ending it’s primary mission both Voyagers are travelling at speeds average of 15 km/s.
On September 2013, Voyager 1 crossed the heliopause of the Sun.(Outer most part of heliosphere) i.e leaving sun’s influence and into interstellar space.Both Voyagers carried a gold plated audio,visual disc containing the location of Earth,in case some intelligent life form may encounter it.
Next destination is Oort Cloud which is 300 years away and would take 30000 years to pass through it.
Good Luck, and Godspeed Voyager!!
1. ASTEROID (MINOR PLANETS)
A body smaller than a planet and made of rock ,metal,and other minerals.There is a large belt of asteroids between Mars and Jupiter.They revolve around the Sun between 2.1 and 3.1 astronomical units.Example : Ceres,4 Vesta.
2. METEOR (SHOOTING STARS)
A chunk or rock or metal that enters into Earth’s atmosphere & burns up in a fiery show.
A chunk or rock or metal that has fallen to Earth from beyond it’s atmosphere.When it passes through the Earth’s atmosphere ,it is seen as a flash of light as it burns as a result of heating caused by friction.
A chunk of rock moving through space.
Comets are heaps of small particles of rock and dust like materials surrounded by large masses of easily vaporized substances like ice,water and ammonia,and methane.They move in highly elliptical orbit and spend most of their time away from the Sun.The formation of tail of a comet is due to what is called Radiation Pressure.Example: Halley’s Comet.
More about Comets: http://amazing-space.stsci.edu/resources/explorations/cometmyth/lesson/facts/Fact6/index_nf.html
One of the most beautiful sights in outer space is that of the nebulae.
Unlike clouds in our atmosphere ,these clouds consists of ionized gases basically hydrogen and helium.
Now why are they important?
They are the birth place of stars.Gases and dust come together to form huge masses that eventually
become stars.i.e (Nuclear Fusion begins).Nebulae span over light years of distance and temperatures can be extreme.The catching names are given by their shape.The spectacular display of color is due to the chemical composition and ionization of gases.
Most of the Nebulae are formed from supernova explosions.
Some examples are : Crab Nebula,Boomerang Nebula,Fox Fur Nebula.
“For small creatures such as we the vastness is bearable only through love.”
Carl Sagan ,about the universe.