liquid water – Page 2 – Shamskm: A site to exchange knowledge and solutions

For UA Astronomy Students, the Sky is Not the Limit

By Guest PostApril 17, 2012Sciencealien planets, distant stars, exoplanet project, hot jupiters, liquid water

UA astronomy students Kevin Hardegree-Ullman and Jake Turner designed, proposed, conducted and presented research on two recently discovered planets outside of our solar system while they were still undergraduates.

Deep in the cosmos, alien planets are circling distant stars, waiting to be pierced by the far-reaching gaze of Earth-bound telescopes. Some are Earth-like and have the potential to harbor liquid water and maybe even life. Others are enormous, gassy giants. All of them are different than any planet we know. (more…)

Fossil Raindrop Impressions Imply Greenhouse Gases Loaded Early Atmosphere

By Guest PostApril 2, 2012Environmentames research center, atmosphere, atmospheric pressure, concentration, david catling, earth history, fossilized, greenhouse gases, jelte harnmeijer, latex peels, liquid water, low carbon innovation, peter polivka, pressure broadening, raindrop impression, raindrop velocity, roger buick, sanjoy som, seattle, South Africa, sun, temperature, warm temperature

In ancient Earth history, the sun burned as much as 30 percent dimmer than it does now. Theoretically that should have encased the planet in ice, but there is geologic evidence for rivers and ocean sediments between 2 billion and 4 billion years ago.

Scientists have speculated that temperatures warm enough to maintain liquid water were the result of a much thicker atmosphere, high concentrations of greenhouse gases or a combination of the two. (more…)

‘Mount Sharp’ on Mars Links Geology’s Past and Future

By Guest PostApril 1, 2012Sciencearizona, bob sharp, curiosity, edward stolper, gale crater, geological sciences, grand canyon, john grotzinger, ken edgett, life magazine, liquid water, mars, michael malin, mount rainier, mount sharp, NASA, robert p sharp, san diego, seattle, spacecraft

One particular mountain on Mars, bigger than Colorado’s grandest, has been beckoning would-be explorers since it was first sighted from orbit in the 1970s. Scientists have ideas about how it took shape in the middle of ancient Gale Crater and hopes for what evidence it could yield about whether conditions on Mars have favored life.

No mission to Mars dared approach it, though, until NASA’s Mars Science Laboratory mission, which this August will attempt to place its one-ton rover, Curiosity, at the foot of the mountain. The moat of flatter ground between the mountain and the crater rim encircling it makes too small a touchdown target to have been considered safe without precision-landing innovations used by this mission. (more…)

New Views Show Old NASA Mars Landers

By Guest PostFebruary 9, 2012Scienceball aerospace, bonneville crater, canadian space agency, color image, denver, earth, hirise camera, liquid water, lockheed martin space systems, mars, mars reconnaissance orbiter, martian arctic winter, martian soil particles, martian surface, meteorite, microscope, NASA, Phoenix, spacecraft, telescopic camera, three petal lander, university of arizona

The High Resolution Imaging Science Experiment (HiRISE) camera on NASA’s Mars Reconnaissance Orbiter recorded a scene on Jan. 29, 2012, that includes the first color image from orbit showing the three-petal lander of NASA’s Mars Exploration Rover Spirit mission. Spirit drove off that lander platform in January 2004 and spent most of its six-year working life in a range of hills about two miles to the east.

Another recent image from HiRISE, taken on Jan. 26, 2012, shows NASA’s Phoenix Mars Lander and its surroundings on far-northern Mars after that spacecraft’s second Martian arctic winter. Phoenix exceeded its planned mission life in 2008, ending its work as solar energy waned during approach of its first Mars winter. (more…)

NASA’s Kepler Confirms Its First Planet in Habitable Zone

By Guest PostDecember 6, 2011Scienceames, constellations, cygnus, douglas hudgins, g type, ground based telescopes, habitable zone, jupiter, kepler, kepler 22b, liquid water, lyra, mars, milestone, NASA, natalie batalha, orbital periods, planet, spitzer space telescope, super earth size, universe, university of colorado in boulder, venus, william borucki

PASADENA, Calif. — NASA’s Kepler mission has confirmed its first planet in the “habitable zone,” the region around a star where liquid water could exist on a planet’s surface. Kepler also has discovered more than 1,000 new planet candidates, nearly doubling its previously known count. Ten of these candidates are near-Earth-size and orbit in the habitable zone of their host star. Candidates require follow-up observations to verify they are actual planets.

The newly confirmed planet, Kepler-22b, is the smallest yet found to orbit in the middle of the habitable zone of a star similar to our sun. The planet is about 2.4 times the radius of Earth. Scientists don’t yet know if Kepler-22b has a predominantly rocky, gaseous or liquid composition, but its discovery is a step closer to finding Earth-like planets. (more…)

NASA Spacecraft Data Suggest Water Flowing on Mars

By Guest PostAugust 5, 2011Scienceflowing water, gullies, lineations, liquid water, mars, martian slopes, subsurface flows

PASADENA, Calif. –– Observations from NASA’s Mars Reconnaissance Orbiter have revealed possible flowing water during the warmest months on Mars. (more…)

NASA Orbiter Reveals Big Changes in Mars’ Atmosphere

By Guest PostApril 22, 2011Scienceatmosphere, dry ice, frozen carbon dioxide, greenhouse effect, lake superior, liquid water, mars, mars reconnaissance orbiter, martian carbon dioxide, martian dust storms, martian surface, NASA, red planet, roberto seu, roger phillips, south pole

PASADENA, Calif. — NASA’s Mars Reconnaissance Orbiter has discovered the total amount of atmosphere on Mars changes dramatically as the tilt of the planet’s axis varies. This process can affect the stability of liquid water, if it exists on the Martian surface, and increase the frequency and severity of Martian dust storms.

Researchers using the orbiter’s ground-penetrating radar identified a large, buried deposit of frozen carbon dioxide, or dry ice, at the Red Planet’s south pole. The scientists suspect that much of this carbon dioxide enters the planet’s atmosphere and swells the atmosphere’s mass when Mars’ tilt increases. The findings are published in this week’s issue of the journal Science. (more…)

Earth-Size Planet Candidates Found in Habitable Zone

By Guest PostFebruary 3, 2011Scienceames research center, charles bolden, constellations, cygnus, earth size planet, extraterrestrial planets, Galaxy, habitable zone, jack lissauer, kepler, kepler 11, kepler 11b, kepler mission, liquid water, lyra, moffett field, NASA, science fiction, space telescope, star, william borucki

PASADENA, Calif. — NASA’s Kepler mission has discovered its first Earth-size planet candidates and its first candidates in the habitable zone, a region where liquid water could exist on a planet’s surface. Five of the potential planets are near Earth-size and orbit in the habitable zone of smaller, cooler stars than our sun.

Candidates require follow-up observations to verify they are actual planets. Kepler also found six confirmed planets orbiting a sun-like star, Kepler-11. This is the largest group of transiting planets orbiting a single star yet discovered outside our solar system. (more…)

Tag Archives: liquid water