RANDOM FACTS EXPRESS#5

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 HEY THERE I'M BACK WITH NEW AND INTERESTING FACTS. SO TIE YOUR SEAT BELT AND READ THE GIVEN FACTS, THIS MAY HELP YOU IN DIFFERENT FACTORS.


1. WHY DO WE HAVE EYEBROWS?

Eyebrows actually serve many functions. Firstly eyebrow protect one eyes, without them, the sweat and rain would easily enter our eyes and hinder our vision, also the sky in our sweat would irritate our eyes. But arched shape and direction of hair help channel sweat and rain towards the sides of our faces, thus protecting our eyes. Secondly eyebrows help to express emotions, in a study it was found that our ancestors were not able to easily move their eyebrows, but due to evolution we gradually gained the ability to move them to a greater extent. Thus, helping us to express a wide range of emotions like anger, surprise etc. Hope you get!!


2. WHY DO ASTRONAUTS WEAR ORANGE AND WHITE SUITS?

The orange space suit is called advanced crew escape suit. Astronaut wear it during the launching and landing period. But why? Because if there is any malfunction during launching our landing period and the astronaut has to abandon the source shuttle, this particular shade will be the most visible colour against any landscape. Thus making it easy for the rescuers to spot the astronaut. Now, the white space suit is called extravehicular activities suit, astronaut wear when they go outside to do some work. It is white in colour for two reasons, firstly the astronaut is exposed to extreme heat of the sun and white is the colour which reflects more heat then any other colours. Secondly, white colour makes it easy to spot the astronaut against the black expanse of space.

3. WHY IS SPACE BLACK?

Space is black because somebody forgot to pay its electricity bill,😂😂

Our sun is huge star which emits a tremendous amount of light, however like our sun, there are so many stars in the universe So, if there are so many stars the space shouldn't be black or dark? However it's not the case . According to a study the space appears to be black because universe is expending, this expansion causes the visible light emitted by the star to streach out so much that when it reaches our eyes they cannot detect it. As our eyes cannot detect the visible light the space appears black to us. Moreover light has specific speed limit so light from far away stars is not even reach to us thus, the space appears black.

4. Why is landing on Mars so difficult? (Extra fact)

Before Mars humans have successfully landed on earth and moon, earth has a thick atmosphere so advantage in this case is that we can use parachute to slow down the space craft. Now, the disadvantage is that it creates fictional heating, thus requiring heat shield. Now, as the moon has no atmosphere the disadvantage is that parachute don't work, hence we need the complex retro rockets but the advantage is that no atmosphere means no friction so no need of heat shield now more than 50% of landings on Mars have fail because we face both the above disadvantage here, why? Because Mars atmosphere is 100X times thinner then Earth's atmosphere so parachutes are not effective hence we need complex retro rockets also as the atmosphere is not completely absent we need heat shield as a result the complexity of landing on Mars increases.

SO GUYS TODAY'S FACTS ARE OVER MEET YOU DAY AFTER TOMMOROW. DONT FORGOT TO SHARE.

KAVYA GUPTA AKA KRISHNA.

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