We always see the same side of moon no matter wherever we are standing on earth!!!

The moon keeps the same face pointing towards the Earth because its rate of spin is tidally locked so that it is synchronized with its rate of revolution (the time needed to complete one orbit). In other words, the moon rotates exactly once every time it circles the Earth.

"The same forces that create tides in the Earth's oceans (from the gravitational pull of the moon and, to a lesser extent, the sun) also act on the solid body of the moon. The Earth's gravitational force on the moon distorts the moon into a slightly prolate, or football, shape; in addition the moon's intrinsic form is somewhat egg-shaped. If the tip of the football/egg does not point toward the Earth, then gravitational forces exert a torque that makes the tip point back toward the Earth (in reality, the moon oscillates a small amount around perfect alignment, a motion called the lunar libration)."

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Why do the planets have different colors?

Planets have the colors that they have because of what they are made of and how their surfaces or atmospheres reflect and absorb sunlight. Mercury has a dark gray, rocky surface which is covered with a thick layer of dust. The surface is thought to be made up of igneous silicate rocks and dust. Venus is entirely covered with a thick carbon dioxide atmosphere and sulphuric acid clouds which give it a light yellowish appearance. Earth shows its blue oceans and white clouds as well as its green and brownish land. Mars is covered with a fine dust which contains iron oxide (rust). This gives Mars its orange color. Jupiter is a giant gas planet with an outer atmosphere that is mostly hydrogen and helium with small amounts of water droplets, ice crystals, ammonia crystals, and other elements. Clouds of these elements create shades of white, orange, brown and red. Saturn is also a giant gas planet with an outer atmosphere that is mostly hydrogen and helium. Its atmosphere has traces of ammonia, phosphine, water vapor, and hydrocarbons giving it a yellowish-brown color. Uranus is a gas planet which has a lot of methane gas mixed in with its mainly hydrogen and helium atmosphere. This methane gas gives Uranus a greenish blue color Neptune also has some methane gas in its mainly hydrogen and helium atmosphere, giving it a bluish color.

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What's the real color of sun?

Look at most child drawings, and you'll see the sun depicted as a yellow ball. Even many adults associate the color yellow with the star found at the center of the solar system. But the Sun isn't actually yellow; it's just an illusion caused by the Earth's atmosphere.

The powerful processes happening inside the Sun are so robust that it emits every color of light imaginable. Together, these colors form a pure white light, which is precisely what you'd see from space.

On Earth, however, the atmosphere filters much of the 'cool' light spectrum, leaving the 'warmer' colors visible to us instead. The filtered blue light refracts from atmospheric molecules, causing the blue appearance of our sky.

During times of sunrise and sunset, the colors of the Sun appear warmer than usual; this means orange or red instead of yellow. This is because of the angle of the Sunlight and the fact that it needs to pass through more atmospheric molecules to reach you.

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Do stars really twinkle?

The answer for it is NO.Wait before you call your nursery teacher that she was wrong look at the reason that how does it SEEMS to twinkle?

Stars do not really twinkle, they just appear to twinkle when seen from the surface of Earth. The stars twinkle in the night sky because of the effects of our atmosphere. When starlight enters our atmosphere it is affected by winds in the atmosphere and by areas with different temperatures and densities.

 

Here's a video of small activity carried out by some scientists .Have a look on it.

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Why is Venus the hottest planet though Mercury is closest to sun?

As we all studied in our lower classes that Venus is the hootest planet of our solar system.But did you ever thought why Venus and not Mercury?

 

The degree of hotness of a planet does not depend on as much on the closeness to the Sun as on its atmosphere.Carbon Dioxide has the tendency to absorb heat which in turn increases the temperature

Mercury does not contain carbon dioxide(because of which all heat is returned to space).Venus contains a high percentage of carbon dioxide due to which it is the hottest planet

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How long does it take sunlight to reach the Earth?

 This sounds like a strange question, but think about it. Sunlight travels at the speed of light. Photons emitted from the surface of the Sun need to travel across the vacuum of space to reach our eyes.

The short answer is that it takes sunlight an average of 8 minutes and 20 seconds to travel from the Sun to the Earth.Here's the math. We orbit the Sun at a distance of about 150 million km. Light moves at 300,000 kilometers/second. Divide these and you get 500 seconds, or 8 minutes and 20 seconds.

If the Sun suddenly disappeared from the Universe (not that this could actually happen, don't panic), it would take a little more than 8 minutes before you realized it was time to put on a sweater.So you have to eat your favorite meal in 8 min and 20 seconds

Here's a small video to look out for:

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Why Mercury and Venus does not have any moon?

• Mercury and Venus do not have moons because they are too close to the sun to have a reasonable gravitational influence of their own on a neighboring celestial body.
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• Most likely because they are too close to the Sun. Any moon with too great a distance from these planets would be in an unstable orbit and be captured by the Sun. If they were too close to these planets they would be destroyed by tidal gravitational forces. The zones where moons around these planets could be stable over billions of years is probably so narrow that no body was ever captured into orbit, or created in situation  when the planets were first being accreted.

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