Mars is one of the five planets visible in the sky with the naked eye. Because Mars is red, it is particularly distinctive. To find it in the sky, you can pick up the current month's copy of "Astronomy" or "Sky and Telescope" magazine; a sky map is on the center pages of both ...
There are intriguing clues that billions of years ago Mars was even more Earth-like than today, with a denser, warmeratmosphereand much morewater—rivers,lakes, flood channels, and perhapsoceans. By all indications Mars is now a sterile frozen desert. However, close-up images of dark streaks...
The first known map of Mars was produced in 1830 byWilhelm BeerandJohann Heinrich von Mädlerof Germany. The Italian astronomerGiovanni Virginio Schiaparelliprepared the first modernastronomical mapof Mars in 1877, which contained the basis of the system ofnomenclaturestill in use today. The names...
which occurs at temperatures as high as on the surface of the sun. In short, we want to melt the surface of Mars. The best way to do that would be to put lasers in orbit, aiming their beams down on Mars. The most powerful laser today is the ELI-NP, able to produce ...
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The search for water on Mars has been a central theme of exploration missions. While liquid water cannot exist on the surface today due to the low atmospheric pressure, there is strong evidence that subsurface water ice is abundant, and it may even flow intermittently in the form of briny li...
We use the spectral solar radiation flux and incorporate the large (10 orders of magnitude) spectral variation in the imaginary (absorptive) part of the refractive index of H2O ice, which determines light absorption in the solar spectrum, in addition to accounting for absorption by martian dust....
Billions of years ago, Mars may have had rivers, lakes, and possibly a large ocean. Over time, however, the planet has lost most of its atmosphere, and today there is no liquid water on the surface. Where Is Mars in the Sky?
Mars also has many other kinds of volcanic landforms, from small, steep-sided cones to enormous plains coated in hardened lava. Some minor eruptions might still occur on the planet today. Related: Space volcanoes: Origins, variants and eruptions Olympus Mons is the largest known volcano in the...
Jakosky and his team hope to ascertain whether the climatic about-face resulted from the sun's stripping away of the early atmospheric water and carbon dioxide. "We measure these things today even though the processes we're interested in operated billions of years ago," he said. NASA ...