Extra-terrestrial life, Science

Assignment Help:

Extra-terrestrial life:

Just as we have been curious about how life originated  on the Earth, we have also tried to explore whether there is life on any other planet in the Solar System or elsewhere in the universe. Explorations of  outer space carried out by  spacecraft and ground based observatories, in  recent years, have led us to the conclusion that in  the entire Solar System, the planet Earth  is, perhaps,  the only place where there is life. The other planets are at such a distance from the Sun that  they are either too hot or too cold for life toexist. The one close possibility is the planet Mars. Space probe Viking collected and analysed samples of rock and soil from Mars to detect the presence of  life. But so  far no conclusive evidence of  any life, present or past, has been  found on this planet. Man  is also looking for life beyond  the Solar System. Two approaches are currently available to him; either to send a man or an instrument to a particular star in the Universe and examine local surface for life or to listen to the signals from outer space which may come in the form of  radio waves. With our present technology, the first approach does not take us beyond  the Solar System.

 

1058_Extra-terrestrial life.png

The second approach is based on the assumption that there may be civilisations technically as advanced or even more advanced than our own. So we can exchange radio messages with  them. We have drawn a blank so far on this front. But  it  is quite possible  that our galaxy, the entire system of dust, gases, and stars within which the Sun moves, is already filled with chatter between the far older and more advanced civilisations! These signals may havc been  transmitted b) a technique still undiscovered  on Earth, so we may be nlissi!?g them altogether! Recently it has been  reported that astronomers have found sornc other stars, like our Sun, which have planets.  If this is provcd  to be true, there may bc millions of  planetary systems in the Universe, increasing the likelihood of  lifc cxisting on some of  them.  


Related Discussions:- Extra-terrestrial life

Wheat flour, why- 1) alcoholic acidity is determined? 2) ash content is imp...

why- 1) alcoholic acidity is determined? 2) ash content is important factor in wheat flour? 3)carbohydrates and sugar are separately denoted on pachaging material?

Personal safeties, Safety aspects in a detailed way here explained the need...

Safety aspects in a detailed way here explained the need for a personal code of behaviour and then gave a list of instructions which could serve as code of practice in a laboratory

Nursing process, Purpose To develop beginning skills in planning care f...

Purpose To develop beginning skills in planning care for clients using the nursing process. General Instructions 1. This assignment should be presented type written, 8

Non-renewable resources, Non-renewable Resources: After learning abou...

Non-renewable Resources: After learning about the renewable resources like water, forests etc., you would like to know what our non-renewable resources such as land, mineral,

Define the utilization of fatty acids, Define the Utilization of Fatty Acid...

Define the Utilization of Fatty Acids In the presence of oxygen, fatty acids are utilized to provide energy and heat. Waste products produced are carbon dioxide and water. Fatt

Military technology used in golden era, Military Technology: Important ...

Military Technology: Important changes were introduced in military technology. Rope and wooden stimps  for horsemen were known in India before the thirteenth century. However,

Explain the gonadotropic hormones (gth), Explain the Gonadotropic Hormones ...

Explain the Gonadotropic Hormones (GTH): There are two gonadotropic hormones which regulate gonadal functions. They are follicle stimulating hormone (FSH) and luteinizing hormo

Moon- earth companion, The Moon, the Earth's  Companion What do you norr...

The Moon, the Earth's  Companion What do you norrqally observe about the Moon? Itshinesbrightest, whenever present in the night sky. It seems to go through phases and it seems t

Describe nabh accreditation, Question 1 Discuss the history of quality in ...

Question 1 Discuss the history of quality in healthcare services Question 2 Explain the dimensions of quality in healthcare Question 3 Describe NABH Accreditation

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd