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Originally posted by ZoooMerHopefully enough to reinvigorate the public attention so we can get our buts out there and land some people on Mars.
Originally posted by zeed85
I`ve always been curious how science recently has been able to know the make up of planets we`ve never gone to.
Originally posted by jra
Through the use of spectrometers and taking photos with various filters in wavelengths that we can't see with our own eyes, just to name a few. Look up a Mars probe and check out the description of the various instruments and what they do.
Originally posted by southern_cross3
The odds of there being substances on Mars that don't exist on Earth are very slim, Generally it's accepted that the solar system, if not the universe, is formed of all the same elements. Being as the periodic table is pretty well filled up, any other elements would have large numbers of protons and be ridiculously massive, most likely not capable of existing in a liquid form on a frigid planet surface.
Because they know how they work.
Originally posted by zeed85
I know that science has these instruments, but how can you prove there correct.
No, when Fernão de Magalhães went around the Earth most people were expecting his return. Scientists supposed the Earth was round many years, even centuries, before that.
Science once believed the Earth to be flat until somebody went around.
Originally posted by zeed85
I know that science has these instruments, but how can you prove there correct.
Science once believed the Earth to be flat until somebody went around.
en.wikipedia.org...
By the time of Pliny the Elder in the 1st century, however, the Earth's spherical shape was generally acknowledged among the learned in the western world. Around then Ptolemy derived his maps from a curved globe and developed the system of latitude, longitude, and climes. His writings remained the basis of European astronomy throughout the Middle Ages, although Late Antiquity and the Early Middle Ages (ca. 3rd to 7th centuries) saw occasional arguments in favor of a flat Earth. The modern misconception that people of the Middle Ages believed that the Earth was flat first entered the popular imagination in the nineteenth century.