Astronomy on Pitara Kids Network

Why's the Sun Red during Sunrise and Sunset?

Sat, 01 Feb 2003 14:19:47 +0000

As day breaks, a reddish-white ball of light that we call the sun, rises. This red haze gives way to a golden-white sheen as the day advances and reappears when the sun sets in the evening. Does the sun really change colours, or does it only seem so? The explanation lies in-between.

Light from the sun consists of three kinds of radiation – ultra-violet rays, visible light and infra-red rays. Unlike visible light, ultra-violet rays and infra-red rays cannot be seen.

Myths & Legends Related to Eclipses

Fri, 02 Jul 1999 15:49:23 +0000

Since time immemorial, eclipses have been interpreted in various ways by different communities all over the world, reflecting many a time the working philosophy of the religious denominations they belong to. The lunar and solar eclipses have, by and large, been held to bring in their wake calamities like epidemics, wars etc. It has been a common practice to observe the do’s and don’ts with religious overtones so as to avoid such cataclysmic fallouts of eclipses as well as hasten their end.

Why Do Stars Twinkle?

Fri, 04 Sep 1998 21:44:16 +0000

Watching stars on a moonless night can be an quite an interesting experience. As clusters of stars take familiar forms – of a bear, a man in armor wielding a sword, millions of other stars simply twinkle. As if they were playing hide and seek with one’s eyes.

We all know that each star is actually like the sun. And the huge collection of stars on the night sky is like a collection of many, many suns. But, the sun does not twinkle, one would point out. So why do other stars twinkle?

Space Quiz

Fri, 25 Aug 2000 11:00:23 +0000

Check out your space facts. Learn more about asteroids, meteors and planets.

Planets! Planets! and more Planets!

Mon, 22 Jul 2002 22:20:18 +0000

Astronomers working at Berkeley and Geneva have found nine new planets circling nearby stars. With this discovery, we now know of 50 extra-solar planets, also called exoplanets. That is a big increase from 41 planets last known five years ago.

All these individual planets move in an orbit around a star, which is called their parent star. The astronomers estimate that the Beta Pictoris star has a planet ten times the mass of Earth. It orbits at a distance of about 10.5 billion kilometers, more than ten times the distance of the earth from the sun. And Vega, one of the brightest stars in the sky appears to have a planet twice the mass of Jupiter, the largest planet in our solar system. This planet is 8 billion kilometers from its parent star. In comparison, our solar system seems almost tiny. The distance between Pluto, the farthest planet in our solar system and the sun is “just” 5.9 billion kilometers!

Why do we See a Face on the Moon

Sun, 17 Mar 1996 20:04:41 +0000

When people say that they see a man’s face on the Moon, they are actually seeing the uneven surface on the Moon. There are deep holes, called craters, and hills on the Moon’s surface. There is no man on the Moon.

That the Moon is much smaller than the stars and even the earth. In fact, four moons put together would make one earth. The Moon looks big because it is much closer to us in comparison to the stars.

How Will our Sun Die?

Wed, 08 May 2002 00:54:36 +0000

Everything that is born must die. Not only living beings, but inanimate objects like stars too.

The birth of a star

The universe has massive clouds of hydrogen floating around. Sometimes, these clouds come together and form very dense and huge balls of hydrogen gas. As the clouds come close, their temperature increases. This is called a proto-star (original star).

The increase in temperature triggers off nuclear reactions at the core of the star. Nuclear reactions inside the star occur when the nucleus of two hydrogen atoms fuse to produce a helium atom. This reaction which is actually the same as that inside a hydrogen bomb, release huge amounts of heat and light. This is what makes a star glow.

How are Stars Named?

Thu, 22 Aug 2002 12:47:58 +0000

Till now we have only seen roads, railway stations, airports, places etc. being named after famous people. But imagine paying money to get a star named after you. If that can happen, then anything is possible in this world!

Well, there are organisations in different parts of the world that sell names for the stars in the sky. All you have to do is – go there, fill out the long, detailed form that they give you and buy star names or name stars after someone.

The Telegraph

Sun, 18 Jan 1998 03:06:34 +0000

In 1833 John Herschel, a British astronomer, went to South Africa to study the southern skies. He took with him a powerful telescope and many other instruments. He wanted to make charts and maps of the sky which people in the northern half of the world never saw. John Herschel planned to stay at the Cape of Good Hope for three or four years to complete his work.

Then Richard Locke, a reporter on the staff of the New York Sun, had a bright idea. Whatever he wrote about John Herschel’s discoveries would be believed as there was no means of verifying it. No one would find out the truth unless he sent a man or message by ship to South Africa, and even then it would take months to receive a reply from the astronomer. In the meanwhile, Locke decided to have all the fun he could.

Galaxies are found in groups or clusters. Many clusters of galaxier are kno...

Sat, 26 Apr 2003 07:58:07 +0000