Since the beginning of astronomical studies, scientists have been excited to know about extrasolar planets or better known as exoplanets. From orbital position to size and mass, there is a vast range of exoplanets in space.

When the term ‘Exo’ is accompanied by some words, it indicates the outer world of that object. Similarly, exoplanets indicate those worlds that revolve around other stars. Based on telescopic observations, and scientific simulation studies, it has been confirmed that there are more than thousands of exoplanets. A recent report says that there are at least 4000 exoplanets are currently present. As the universe is gradually expanding, there are high chances of more exoplanets than the counted number. Scientists first sensed the presence of extrasolar planets more than 100 years ago. However, it was not confirmed then due to the absence of sufficient equipment setup. Here, we gathered some really interesting facts about exoplanets.

The first detected ones:

Gamma Cephei Ab is the first detected exoplanet. It was observed in 1998. However, it wasn't confirmed till 2003. The unofficial discovery of exoplanets took place in 1992. Scientists observed that at least two planets were revolving around ‘pulsar PSR 1257+12’. There are many sun-like stars present in space. The first exoplanet detected for such sun-like stars was ‘51 Pegasi b’.

Scientists are trying hard to find the clue behind the origin of the earth by studying exoplanets:

It may seem strange, but, understanding the condition and behavior of exoplanets can potentially answer the queries regarding the formation of life on the planet Earth. Scientists are trying to find the traces of gas or water (if present) in those detected exoplanets. The gaseous substances will provide an idea about the chances of the formation of life on those planets. If by any chance, traces of life is detected, then the highly controversial ‘panspermia’ theory will be proved right for the origin of life on planets.

Mission to detect exoplanets:

NASA has launched one special mission named as Kepler Mission, to understand the distant space or World. This mission was launched in 2009. Scientists are trying to understand the atmosphere, magnetic field, temperature, and other basic parameters through this mission.

Why scientists are so keen to study exoplanets?

The answer is very simple. Considering climate change and ever-increasing pollution levels, the planet Earth might become uninhabitable in the future. So, the search for a backup planet option is a must for the sustainability of mankind. You will be surprised to know that many exoplanets have a habitable zone. This is the area around any star where water can be detected in liquid form. Only, in that region, life can be found or in other words, habitable for mankind. There are at least 22% of sun-like stars with earth-alike planet structures providing habitable zone.

So, are you interested to visit any of those exoplanets if Earth is not suitable for living?