CURRENT AFFAIRS

2023

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Scientists have detected potential signs of extraterrestrial life on which among the following planets?
A
Venus
B
Mars
C
Saturn
D
Jupiter
Explanation: 

Detailed explanation-1: -Unfortunately not. Until we are able to observe any possible Venus microbes directly-perhaps through sample return-the next step would be to rule out all non-life sources of the phosphine. One possibility is volcanoes.

Detailed explanation-2: -The atmosphere on Venus and Mars constitutes about 95-97% carbon dioxide. Life cannot exist in such a CO2 rich atmosphere.

Detailed explanation-3: -Earlier this month scientists announced the surprising discovery of phosphine on Venus. This compound of phosphorus and hydrogen could be associated with life.

Detailed explanation-4: -Its gaseous envelope is composed of more than 96 percent carbon dioxide and 3.5 percent molecular nitrogen. Trace amounts of other gases are present, including carbon monoxide, sulfur dioxide, water vapour, argon, and helium.

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