Scientists are always excited about other planets, especially Mars. Scientists, who are dreaming of establishing human settlements on other planets, continue to study in this direction. In this sequence, an important fact has come to the fore. Now researchers say that using data from the European Space Agency's Mars Express orbiter, what were shown to be subsurface lakes found beneath Mars' south pole may not be lakes.
Hence the confusion, in the year 2018, two research teams working on the data of Mars Express Orbiter announced a surprising discovery. At that time, the reflected radar signals from the South Pole of the Red Planet were claimed to be the lake. At the same time, now a team of scientists from NASA and Arizona State University (ASU) has found dozens of similar radar images around the South Pole after analyzing a comprehensive set of Mars Express data.
Liquid cannot exist in extremely cold areas
According to him, there is very little chance of water being present in the liquid state in the areas which were earlier claimed to be lakes because those areas are extremely cold. Water cannot exist in a liquid state in such a cold environment. According to Aditya Khullar of ASU's School of Earth and Space Exploration, radar waves typically lose energy as they travel through a material. Therefore the reflection at depth should be less luminous than the surface.
Many reasons to shine
However, there may be other reasons for the unusually shiny subsurface. These two studies concluded that water in the liquid state may be the cause of these luminous reflections, as water in the liquid state appears bright on the radar. It was originally hypothesized to contain liquid water in a relatively small area of the Martian South Polar Layered Deposit, about 10 to 20 kilometers.
For the new study, the team of scientists studied the south polar region of Mars in detail. Data from 44 thousand measurements collected over 15 years were analyzed with radio signals. It found a higher number of bright images than the previous study.
Shiny surfaces no water
In some places, such shiny surfaces were closer to a mile, where temperatures are expected to be minus 63 degrees Celsius. In such a cold environment, water freezes, even if salty minerals are found in it. In such a situation, the fact that these shiny surfaces are water does not seem to be proved right.
...more study needed
According to Jeffrey Platt of NASA's Jet Propulsion Laboratory (JPL), it is not clear whether these signals are of water in the liquid state, but they appear to be much broader than in the original paper. Either liquid water is common below Mars' south pole, or these signals point to something else. At present, further study is needed on this.