The Indian Space Organization (ISRO) has launched a special satellite called Astrosat on the 28th through a rocket to collect information about various stars in the sky. It can be described as a flying telescope.

Because it orbits the Earth like a satellite while looking out into space to explore the stars. Its mission is to detect things that cannot be detected by ground-based telescopes.

Innumerable telescopes already exist in many countries of the world including India. So many discoveries have been made in the past through these. However, there are many things that cannot be known by these.

If it is daytime, the light comes from the sun. If it is night time, the light comes from the stars, and we can see that light. But be it the sun or the stars, not only light but also other kinds of rays come from them.

Many people have read about Electromagnetic Waves in their school textbooks. Electromagnetic waves are classified according to their wavelengths. Light is one of these waves. X-rays and gamma rays also belong to this family of electromagnetic waves.

Ultraviolet (Ultra Violet) and Infrared (Infra Red). belong to this category. This family also includes radio waves used for radio broadcasting.

Of these different waves, only light waves are visible to our eyes. Other types of waves are invisible to us. Apart from this, all these types of rays (also called waves) emanate from stars and other celestial bodies. They should also be explored. If we can't see it with our eyes, we may ask, can we examine those rays with special instruments? There is a big problem with that.

The atmosphere surrounding the Earth blocks the gamma rays and X rays from the stars. Airspace allows light waves. Allows radio waves. Allows some UV rays and some infrared rays.

At that level, telescopes in many countries around the world only examine light waves and radio waves. Many also explore starlight at night.

Another type of telescope is one that monitors radio waves from stars at all times of day and night. They are called Radio Telescope. They have very broad antennae. These cannot be called binoculars. They see nothing. Just like our ears pick up sound waves, they pick up radio waves. If necessary, these can be described as remote listeners.

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