What is Chromosphere?

The chromosphere is the transition zone between the corona and the photosphere. It is basically the red and shining layer of gas above the Sun’s photosphere. It is the second layer of the atmosphere of Sun with photosphere as the first one and corona the third. It is about 2000-3000 km deep and of very

What is CELSS?

CELSS stands for Controlled Ecological Life Support System. They are also termed as ‘Living machines’ which give complete life support like fresh air, water, organic food etc. to the residents by continually recycling the waste produced by the inhabitants and also CELSS at large.  It is thus, a scientific project which is directed towards the

What is Alpha Centauri?

Alpha Centauri is a system of stars which is closest to the Solar System i.e. about 4.37 light years from Sun. It is comprised of three stars namely; Alpha Centauri A (Rigil Kentaurus) Alpha Centauri B which mostly forms the binary star Alpha Centauri AB Alpha Centauri C (Proxima Centauri) It was in 1592 when

What is an Aurora?

Aurora was also known as polar lights (northern lights or aurora borealis and southern lights or aurora australis).It is a natural display of lights in the sky in Arctic and Antarctic regions.  It is caused when streams of charged particles from Sun collide with particles from gases like oxygen and nitrogen present in the atmosphere

What are Asteroids?

Asteroids also called the inner solar system are minor planets which are neither categorised as a planet or a comet. They are in direct orbit around the Sun. They primarily remain on the circumstellar disk of gas around new stars and also the debris of the disk together. They are also known as planetoids and

What is an Achromatic Lens?

An Achromatic Lens is the one which is so designed to completely control the effects of chromatic distortion or even aberration. It is made by the combination of lenses of two different types with different focal powers so that the light from both together are free from achromatism. It is also known as achromat. The