In the December 11 issue of Science, Holland's group outlines its findings and how they might rule out some theories of the way Earth formed
its atmosphere as the planet coalesced some 4.5 billion years ago.
It will also enable the study of thermal and scattering properties of
the atmosphere as the planet orbit around the star.
The warming oceans could start to return more carbon dioxide to
the atmosphere as the planet warms, according to new research.
Also note that human induced warming probably will trigger natural C02 / methane emissions leading to further warming so anthropogenic source will probably play a decreasing role in the amount of C02 in
the atmosphere as the planet moves to a new equilibrium point.
Not exact matches
Depending on whether you're landing on a
planet or a moon that has no
atmosphere, a thin
atmosphere, or a dense
atmosphere, and depending on whether you're reentering with no payload in the front, a small payload, or a heavy payload, you have to balance the rocket out
as it's coming in.
Jupiter's Great Red Spot is about twice
as wide
as Earth and has tumbled in the
planet's
atmosphere for at least 350 years.
Heaven is that
planet 35000 light - years from earth, ten times
as big made of hydrogen and oxygen for water, gold
as atmosphere (yes we're taking the gold) But to desist
as soul when given the chance in hell if you truly believe seems impassible for me to fathom.
There are hundreds of billions of stars in our galaxy, each with
planets, that large of a number even if a tiny fraction had an
atmosphere and even if a fraction of them had water (
as we know it is required, but life may not require it on other
planets) it would be amazing if there wasn't a carbon based lifeform somewhere else in our galaxy, let alone in the universe with billions of galaxies each with billions of stars and trillions of
planets.
Whether it is the sprawl of deserts or the loss of tropical forests
as the world's poor cut trees for firewood and clear land for agriculture, or the ineluctable warming of the
planet as vehicles and factories deposit millions of tons of greenhouse gases into the
atmosphere, «economic pressures lie behind them all» (Tolba 1991, p. 10).
As one of the group's leaders, Hsu Jen - hsiu, rightly says eating less or no meat is a way to love our
planet because livestock emit large volumes of methane into the
atmosphere, which contribute more to global warming than the emissions produced by all the vehicles around the world.
It's no mystery why carbon dioxide (CO2) levels fluctuate with the seasons:
As greenery grows in the spring and summer, it soaks up the
planet - warming gas, and when trees shed their leaves in the autumn, some of that gas returns to the
atmosphere.
A thrilling epoch in the exploration of our solar system came to a close Friday (Sept. 15, 2017),
as NASA's Cassini spacecraft made a fateful plunge into the
atmosphere of Saturn, ending its 13 - year tour of the ringed
planet.
As of this writing, Cassini is scheduled to end its travels around Saturn in mid-September by diving, on command, into the
planet's
atmosphere.
Their calculations indicate that the
planet's
atmosphere could lose 3 to 5 times
as many charged particles, a process called ion escape.
As soon as more CO2 enters a watery planet's atmosphere, its warming effect is rapidly amplifie
As soon
as more CO2 enters a watery planet's atmosphere, its warming effect is rapidly amplifie
as more CO2 enters a watery
planet's
atmosphere, its warming effect is rapidly amplified.
Forming in the system's colder outer regions, where volatile compounds such
as water and carbon dioxide freeze out, makes it possible that the
planets incorporated those ices and carried them along to a warmer place where they could melt, evaporate, and become oceans and
atmospheres.
As Io passes behind Jupiter, its surface quickly cools from 127 K -LRB--- 146 °C) to about 105 K -LRB--- 168 °C), a sudden chill that's sufficient to cause about 80 % of the
atmosphere to turn into frost, the researchers report online today in the Journal of Geophysical Research:
Planets.
And for decades, some scientists thought that happened because the
atmosphere superheated the
planet, igniting fires everywhere on Earth
as fireballs rained down from the skies.
Transits can reveal
atmospheres because
as a
planet passes in front of its star, atmospheric gases can absorb certain frequencies of the light passing through.
The simulations also suggest that the removal of excess carbon dioxide from the
atmosphere by natural processes on land and in the ocean will become less efficient
as the
planet warms.
Patrick Dufour of the University of Montreal in Canada and colleagues have now found a white dwarf with the most contaminated
atmosphere yet, suggesting it ate something
as big
as a dwarf
planet.
In 2001, Charbonneau and astronomer Tim Brown of the High Altitude Observatory in Boulder, Colorado, used this technique to «sniff» the
atmosphere of a huge, broiling
planet called HD 209458b, even though it is 150 light - years away — 4 billion times
as distant
as the moon.
As a result, Tarduno says, the Red
Planet had no magnetic field to protect the
atmosphere, which may explain why its
atmosphere is so thin.
But some scientists — Chris McKay, for example — see it
as highly unlikely that the Red
Planet is active enough to produce methane and believe there is no explanation for its high rate of dissipation in the
atmosphere.
Kasting adds that far - out
planets will be fainter and harder to see than close - in
planets, so finding these distant worlds will be more difficult,
as will studying their
atmospheres.
In addition, 55 Cancri e transits its star, meaning it crosses the star's face
as seen from Earth, casting a shadow that astronomers can data - mine for information about the
planet's possible
atmosphere and surface.
As the species» population grows and its energy harvesting intensifies, for example, the composition of the
planet and its
atmosphere may become altered for long timescales.
Frozen mixtures of water, ammonia and methane make up a thick layer between the
planets»
atmosphere and core — known
as the mantle.
After large volcanic eruptions that pump sulphur dioxide into the
atmosphere, such
as that of mount Pinatubo in the Philippines in 1991, the
planet cools for a year or two.
The
planet appears to be too hot and violent to support anything like life
as we know it, but now that astronomers know how to study the
atmosphere of one exoplanet, they are ready to try extending the technique to other, potentially more inviting worlds.
In particular, they are looking at the
planet as it transits, seeking a telltale broadening of its planetary shadow due to starlight being absorbed by a hydrogen - rich
atmosphere.
And it didn't budge, even
as winds in the
planet's upper
atmosphere whipped along at a brisk 100 meters per second.
The starlight that streams around the
planet as it passes conveys valuable information — like the
planet's size and the chemical makeup of its
atmosphere — to the telescopes and spectrometers of Earth - bound stargazers.
As it sidled up to the
planet, Galileo sent a probe into the
atmosphere that measured temperatures, pressures and chemical abundances.
Rocky
planets like Earth, Mars and Venus gained their
atmospheres as volcanic gasses like carbon dioxide and water vapor were released from the
planets» interiors.
But for planetary scientists, Jupiter's most distinctive mystery may be what's called the «energy crisis» of its upper
atmosphere: how do temperatures average about
as warm
as Earth's even though the enormous
planet is more than fives times further away from the sun?
So, using NASA's Infrared Telescope Facility, astronomers observed Jupiter for nine hours, looking for these flows
as thermal fluctuations in the
planet's upper
atmosphere.
If Proxima b proves to have an
atmosphere, Loeb and Kreidberg have also proposed using Webb to probe for the infrared signature of ozone in Proxima Centauri's glare
as a possible sign that the
planet's air is filled with oxygen — something that, on Earth, is mostly produced by life.
With NASA's James Webb Space Telescope, set for launch in 2018, astronomers will be able to analyze starlight that passed through a
planet's
atmosphere, known
as a transmission spectrum.
As a transiting
planet passes in front of its star, some starlight passes through the
planet's
atmosphere and continues on toward Earth — minus certain spectral frequencies that have been absorbed by molecules in the
atmosphere.
As humanity burned fossil fuels such as coal, which added carbon dioxide gas to the Earth's atmosphere, we would raise the planet's average temperatur
As humanity burned fossil fuels such
as coal, which added carbon dioxide gas to the Earth's atmosphere, we would raise the planet's average temperatur
as coal, which added carbon dioxide gas to the Earth's
atmosphere, we would raise the
planet's average temperature.
But if pushed to the limit, it just might be able to provide the first indication of life — a telltale molecule, such
as oxygen, in the
planet's
atmosphere — on a super-Earth circling another star.
But at the
planet's far polar regions, some of these particles enter our
atmosphere and provide the sweeping light shows we know
as auroras.
Since the 1990s, scientists have been discussing using aircraft to inject aerosols, such
as sulfates, into the
atmosphere as a form of geoengineering to mimic volcanic eruptions that sometimes cool the
planet by casting shades of particulate matter.
That's when mission planners project radio communications will be lost with the two - ton, bus - size spacecraft
as it plunges into the giant
planet's turbulent
atmosphere at more than 122,000 kilometers per hour.
As we flood the
atmosphere with more CO2, and average global temperatures rise, some areas of the
planet are getting wetter.
It may seem surprising to people, but you can look at something like Mars, which has a very thin
atmosphere, and you can look at something like Venus which we tend to think of
as sort of having this rather heavy, clouded
atmosphere, which [is] hellishly warm because of runaway greenhouse effect, and on both of those
planets you are seeing this phenomenon of the
atmosphere leaking away, is actually what directly has led to those very different outcomes for those
planets; the specifics of what happened
as the
atmosphere started to go in each case [made] all the difference.
«Water evaporation and condensation processes
as well
as the strong greenhouse effect of water vapor and clouds decisively influence the energy balance of the
atmosphere and the entire
planet,» says Matthias Schneider from the KIT Institute of Meteorology and Climate Research (IMK).
By seeing which wavelengths are absorbed
as the starlight passes through the
planet's
atmosphere, astronomers could determine whether the
atmosphere contains water, carbon monoxide, methane, and carbon dioxide.
But if it is a
planet,
as one team of astronomers thinks, we may be in for some celestial fireworks in 2032, when Fomalhaut b starts to plough through a broad belt of debris that surrounds the star and icy comets within the belt smash into the
planet's
atmosphere.