Universe

Option: B
Explanation :Nicolaus Copernicus proposed heliocentric model of the solar system. He placed the Sun at the center rather than the Earth. He explained the work in his book “On the Revolutions of the Heavenly Spheres”. He presented the idea that the Earth along with other planets revolves around the Sun.

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Option: C
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Option: A
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Option: B
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Option: B
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Option: A
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Option: A
Explanation :A space probe is a robotic spacecraft that does not orbit Earth, but instead, explores further into outer space. A space probe may approach the Moon; travel through interplanetary space; flyby, orbit, or land on other planetary bodies; or enter interstellar space.

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Option: A
Explanation :STS-1 (Space Transportation System-1) was the first orbital spaceflight of NASA’s Space Shuttle program. The first orbiter, Columbia, launched on 12 April 1981 and returned on 14 April, 54.5 hours later, having orbited the Earth 36 times.

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Option: B
Explanation :Which is considered as first molecule of our universe? The correct Answer is Helium Hydride ion. Helium Hydride ion is considered as first time molecule of our universe because it has been detected in space after decades of searching. Moreover Scientists discovered its signature in our own galaxy using the world’s largest airborne observatory, NASA’s Stratospheric Observatory for Infrared Astronomy, or SOFIA, as the aircraft flew high above the Earth’s surface and pointed its sensitive instruments out into the cosmos.
You may also read this The first space shuttle was launched by NASA in
When our Universe was young then only a few kinds of atoms existed. Astrophysicists believe that around 100,000 years after Big Bang so ionized hydrogen and neutral helium atoms combined to make the helium hydride ion (HeH+) first time. This molecule should be present in some parts of the modern Universe but it has never been detected in space until now.
Hence today our Universe is filled with large complex structures like planets, stars and galaxies. At this time Universe was hot and only few types of atoms, mostly helium and hydrogen exists.

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