Discovery Of Mars 😡

Discovery Of Mars 😡:

The English astronomer William Herschel made an unsuccessful search for satellites of Mars in 1783.  Hisernown was such that many astronomers were thereby convinced that Mars had no Moons. A very careful search was conducted in 1864 at the Copenhagen Observatory by HLD Arrest. However he was no more successful than Herschel. It was not until 1877 that the two Moons of  Mars  was discovered by Asaph Hall at US Naval Observatory in Washington DC, USA. The outer satellite ( 1st moon) was discovered on August 11th and inner one ( 2nd moon) on August 17th. The telescope used by Hall for his discoveries was 26-Launch Refractor. 

Mars view by NASA:

Naming:

It was chosen those suggested by Mr Madan of Eton, England viz Deimos for outer satellite, Phobos for inner satellite. These are names of horses draw the Chariot of Mars, but in the lines referred to (in the 15 book of iliad ) they are personified by Homer and mean the attendant or Sons of Mars {The god of war}.

One  belief that  these Moons are asteroids that have been gravitationally captured by Mars.

Overview:

Mars has two Moons Phobos and Deimos that very small and irregular in shape. They orbit quit close to the planet and Phobos the inner Moon. Because of their small size, they were discovered only a little over a century ago. They are both very dark object covered in craters. However strangest of all in the apparent knowledge of their existence 150 years before they were discovered.   

Evidences Of Life On Mars 😡:

There are few evidences due to which scientist constraint to think about existing of life on Mars. When imagining locations where extraterrestrial life could potentially dwell few places inspire the imagination like one of Earth's closest neighbors. For centuries man has looked to Mars and imagined it as a home for other beings. Over the last fifty years various missions to the Red Planet have sought to determine the probability of such an evolution. But how likely is life on Mars?

A Habitable Environment:

When searching for life, most astrologists agree that water as a key. All forms of terrestrial life require water, and while it is possible that life could evolve without the precious liquid, it is easier to search for conditions that are known to be optimal, rather than conditions we suppose could be. This raises a problem on Mars. The planet today is dry and barren, with most of its water locked up in the Polar Ice Cap. The planet thin atmosphere allows radiations from Sun to irradiate the surface of the planet, adding to the environment's challenges. Evidences for water first showed up in 2000, when images from NASA's Mars Global Surveyor found gullies that appeared to have formed from flowing water.

But Mars 😡 wasn't always a  desolate wasteland. Scientists think that, in the past, water may have flowed across the surface in rivers and streams, and that vast oceans covered the planet. Over time , the water was lot into space, but early conditions on the wetter planet could have been right for life to evolve. One estimate suggests that an ancient ocean could have covered as much as 19%  of the planet's surface , compared to 17% covered by Earth's Atlantic  Ocean. " With Mars 😡 losing that much water, the planet was very likely wet for a longer period of time than as previously thought, suggesting it might have been habitable for longer," said Michael Mumma, a senior scientist at Goddard, said in a statement.

It's also possible that liquid water flows on a modern Mars, either on the surface or beneath. The debate continues today on whether features known as recurring slope line (RSLs) from on going water flow or running sand.  Colin Dundas of the U.S. Geological Survey's Astrology Science Center in Flagstaff, Arizona, said in a statement, " This new understanding of RSL supports other evidences that shows that Mars today is very dry."
Water beneath the surface may be even better for life. Underground۔