The best - observed dust
clouds near the Sun have masses of several hundred solar masses and sizes ranging from a maximum of about 200 light - years to a fraction of a light - year.
Not exact matches
Oh, then comes the day when the
sun rises in the sharp brittle light of
near winter mornings when there are no
clouds in the sky.
Expect
sun and
clouds with temperatures in the upper 70s to
near 80 in the afternoon..
Astrophysicists simulated the fate of a hydrogen
cloud as massive as 10,000
suns that suddenly wafted
near a black hole.
Unlike the Solar System where most of the gravitational pull comes from the
Sun and is simple to model, it is much harder to describe the gravitational field
near the centre of the Galaxy, where millions of stars, vast
clouds of dust, and even dark matter swirl about.
To make the modeled zodiacal
cloud as dense as the real one, the dust had to come from comets falling apart, not just those shedding dust
near the
sun, the team reports in the 20 April issue of The Astrophysical Journal.
Based on its direction of motion, the
cloud is expected to hit a region about a quarter of the way around the galaxy from the
Sun,
near the Perseus arm of the galaxy.
Since his prediction, Alfvén waves have been associated with a variety of sources, including nuclear reactors, the gas
cloud that envelops comets, laboratory experiments, medical MRI imaging and in the atmosphere of our
nearest star — the
Sun.
On the other hand, the levels of carbon monoxide and methanol in the coma might have changed over time, especially because Jupiter - family comets spend more time
near the
Sun than Oort
Cloud comets do.
Astronomers find evidence of enormous black hole one hundred thousand times more massive than the
sun in a gas
cloud near the galaxy's centre.
A third theory suggests inner Oort
cloud objects are captured extrasolar planets from other stars that were
near our
Sun in its birth cluster.
Furthermore, the T Tauri star - disk systems within 100 pc of the
Sun tend to be older, on average, than the large numbers of star - disk systems that are still found in or
near their natal dark
clouds.
Even with
near zero CO2, and the
Sun 3 - 4 % dimmer than now, the tropics require albedo help from
clouds and encroaching sea ice for global freeze - 0ver — hence, an interesting science problem that needs careful cold - climate
cloud and ocean dynamics modeling.
Groisman, P. Ya, R.S. Bradley and B.
Sun, 2000 The relationship of
cloud cover to
near - surface temperature and humidity: comparison of GCM simulations with empirical data.
«This H2O negative - feedback effect on CO2 is ignored in models that assume that warm moist air does not rise and form sunlight - reflecting
clouds, but remains as humid air
near sea level, absorbing infrared radiation from the
sun, and approximately doubling the temperature rises predicted from atmospheric CO2 increases.
But unless you include the
Sun early last century and
clouds in the latter part — which are related to SST decadal Pacific variation — then you are nowhere
near explaining surface temperature changes.
It would imply that the CO2 forcing of
near 2 W / m2 has already all been balanced by something, presumably a combination of increased aerosols, increased surface temperature, reduced other GHGs, increased
clouds, increased surface albedo, and / or a weaker
sun.
Near the subsolar point (dark blue colors), where the
Sun is directly overhead,
clouds reflect more than 1000 Watts of energy per square meter of Venus's surface area, an amount almost as large as the energy that Earth receives from the
Sun.