All seven planets discovered in the system could potentially
have liquid water on their surfaces, though their orbital distances make some of them more likely candidates than others.
For life to have developed and remained, you would have to
have liquid water in that tiny area continually for possibly billions of years.
Point 3 — There was division of waters, especially since you can
not have liquid water on the surface of the earth without a sun to provide heat.
Three of the worlds lie in the star's habitable zone, where there is the greatest likelihood
of having liquid water and maybe even life.
«These discoveries demonstrate life developed on Earth at a time when Mars and Earth
had liquid water at their surfaces,» said Dodd.
Studies of hydrogen molecules in the Venusian atmosphere by NASA's Pioneer - Venus probe indicate that the planet
once had liquid water on its surface, perhaps even expansive oceans.
Lighter - toned bedrock that surrounds fractures and comprises high concentrations of silica — called «halos» — has been found in Gale crater on Mars, indicating that the
planet had liquid water much longer than previously believed.
San Francisco State University astronomer Stephen Kane and an international team of researchers have announced the discovery of a new rocky planet that could
potentially have liquid water on its surface.
It exists in its sun's «Goldilocks Zone» — neither too hot nor too cold for life — and could very
well have liquid water.
«We typically
think having liquid water on a planet as a way to start life, since life, as we know it on Earth, is composed mostly of water and requires it to live,» explains Hinkel.
The hot little planet may
have liquid water anyway, Charbonneau said: its density is consistent with a water - heavy makeup, plus a crushing atmosphere whose pressure would allow water to remain liquid at high temperatures.
A microbe found on Earth has been shown to survive happily in conditions known to exist on Enceladus,
which has a liquid water ocean beneath its icy crust.
In order to be warmed
sufficiently have liquid water at the surface, an Earth - type rocky planet would have to be located very close to such a cool and dim red dwarf star like CD - 51 5974.
For an Earth - type planet, the orbital distance where it would
have liquid water zone on its surface would be around 0.884 AU, where the orbital period would be 392 days (1.073 years) if the star actually does have around 60 percent of a Solar - mass.
«The separation between the planet and its star is just right
for having liquid water at its surface,» says astronomer and team spokesperson Stephane Udry of the Observatory of Geneva in Versoix, Switzerland.
An Earth - type planet could
have liquid water in a stable orbit centered around 0.036 AU from Star B — well within the orbital distance of Mercury in the Solar System.
That finding was really important to NASA because you can imagine any body in the solar system that
has liquid water beneath the surface — like Jupiter's moon Europa, probably — will have energy for organisms as well.
In one case, an Earth - sized planet could orbit in the habitable zone (capable
of having liquid water on their planetary surface) around two stars close together.
SAN FRANCISCO, April 17, 2014 — San Francisco State University astronomer Stephen Kane and an international team of researchers have announced the discovery of a new rocky planet that could
potentially have liquid water on its surface.
For an Earth - type planet around HD 189733 A to
have liquid water at its surface, it would need a stable orbit centered around 0.5 AU — between the orbital distances of Mercury and Venus in the Solar System (with an orbital period around 150 days assuming a stellar mass around 82 percent of Sol's.
«Life as we know it needs liquid water, elements like carbon, nitrogen, phosphorus and sulfur, and it needs some form of chemical or light energy to get the business of life done,» said Kevin Hand, the paper's lead author, based at NASA's Jet Propulsion Laboratory, Pasadena, Calif. «
Europa has the liquid water and elements, and we think that compounds like peroxide might be an important part of the energy requirement.
Three are firmly in the «habitable zone,» with enough starshine to
have liquid water oceans, as long as they have Earth - like atmospheres.
«The still nameless planet is believed to be Earth - like and orbits at a distance to Proxima Centauri that could allow it to
have liquid water on its surface — an important requirement for the emergence of life.»
They could
have liquid water and life.»
We have liquid water - color paint, but food coloring works just as well.
Astronomers announced today the discovery of an extraordinary planetary system: seven Earth - sized planets that could
all have liquid water on their rocky surfaces.
HD 85512b In September European astronomers announced the discovery of 50 new planets, including one of the most Earthlike ones yet: HD 85512b, a rocky world just 3.6 times as massive as our own and mild enough to
have liquid water.
As the team reports today in Astronomy & Astrophysics, it found an even wider range of circumstances in which Proxima b could
have liquid water than the earlier study.
«Astronomers discover new rocky planet that may
have liquid water.»
ne = the number of habitable planets around each star In days gone by, scientists would speak solemnly about our solar system's «habitable zone» — a theoretical region extending from Venus to Mars, but perhaps not encompassing either, where a planet would be the right temperature to
have liquid water on its surface.
«The reason that life originated on Earth is because this is the place where
you have liquid water.
Images from NASA's Phoenix lander in 2009 suggested
it had liquid water running down one leg, but this sighting may also have been ice, leaving the case for liquid water inconclusive.
A lot of people think that 10 percent of nearby stars have Earth - like planets close enough to their stars to
have liquid water, but it could be 1 percent or even lower.
So does the realization that the habitable zone (the region around a star where a planet could
have liquid water, essential for life as we know it) is a lot broader than anyone had thought back in 1960.
A planet's habitable zone is based on its distance from the sun and temperatures at which it is possible for the planet to
have liquid water.
We went to Mars seeking evidence concerning whether or not it once
had liquid water and a habitable environment, and I think we've found a definitive answer to that question.
These stars have narrow habitable zones — the areas around them where planets could
have liquid water — yet their prevalence makes them tempting targets in the search for life.
Phrases with «to have liquid water»