This is because their intense magnetic activity interferes with the light emitted by the star to a far greater extent than a potential giant planet,
even in a close orbit.
Not exact matches
Planets
orbiting more compact objects, such as white dwarfs, pulsars and black holes, might have
even shorter years since they can get
closer in.
Dawn co-investigator Maria Cristina De Sanctis of the National Institute of Astrophysics
in Rome, Italy and colleagues report their detection of abundant ammonia - rich minerals on Ceres's surface, suggesting that it was born
closer to the vicinity of Pluto
even though it now
orbits in the Asteroid Belt.
If you were to get into a spaceship and put it into
orbit around this perfect blackness, you would find, once you got
close enough, and
even before you started your final descent into darkness, that you were no longer
in control.
Even if you could find a single
orbit that emerged from the boundary and led to the moon, another
orbit infinitesimally
close by might lead a million miles away
in the opposite direction.
In the following months, Prospector will continue to send back more detailed data, eventually dropping from its present
orbit 62 miles above the moon's surface to a mere six miles for an
even closer look.
According to Spilker, Cassini's
orbit will move
closer to the outer edge of the A ring
in late 2016 and provide an opportunity to study Peggy
in more detail and perhaps
even image it.
But
in several weeks, Rosetta will settle into a
orbit of 30 kilometers — and it may attempt
orbits even closer than that, if the comet's activity level will allow.
From
even just a few light - years away
in our own little corner of the Milky Way, a planet
in an
orbit comparable to Earth's would be too
close to its star for
even the Hubble to see them as two distinct objects.
It will be a few years before we see the results of this mission as,
even through the Sun is quite
close in astronomical terms, it is still a huge distance from the Earth and the mechanics of getting the probe into the right
orbit require multiple
orbits and positioning.
The failure, thus far, to find large substellar objects like brown dwarfs or a Jupiter - or Saturn - class planet
in a «torch»
orbit (
closer han the Mercury to Sun distance) around 107 Piscium — with
even the highly sensitive radial - velocity technique of Geoffrey W. Marcy and R. Paul Butler — bodes well for the possibility of Earth - type terrestrial planets around this star (Cumming et al, 1999).
«The young star was accelerated to a large velocity by the
close approach, and certainly now is
in a very different, more remote
orbit, and may
even completely escape its companions,» said Laurent Loinard, leader of the research team that also included Monica Rodriguez
in addition to Luis Rodriguez.
When it was discovered, this phenomenon could not be completely explained by Newtonian mechanics, and for many years it was hypothesized that another planet might exist
in an
orbit even closer to the Sun to account for this perturbation (another explanation postulated a slight oblateness of the Sun).
With a brown dwarf within a parsec of our own system being a hopeful and still - possible scenario for a more - accessible long - term destination than the Alpha Centauri system, I'd say the idea and hope that there could be something
even semi-habitable
in close orbit around that brown dwarf is a lot more exciting than just rocks or iceballs.
GJ 1214 is a red dwarf star with one known planet
in a hot inner
orbit, beyond
even the inner edge of the star's
close -
in habitable zone, as imagined by Aguilar with two hypothetical moons (more).
The failure, thus far, to find large substellar objects like brown dwarfs or a Jupiter - or Saturn - class planet
in a «torch»
orbit (
closer than the Mercury to Sun distance) around Xi Boötis A — with
even the highly sensitive radial - velocity methods of Geoffrey W. Marcy and R. Paul Butler — bodes well for the possibility of Earth - type terrestrial planets around this star (Cumming et al, 1999).
The smallest planet
orbits Kepler - 33, a star older and more massive than our Sun, Sol, which also had the most detected planet candidates at five (ranging
in size from 1.5 to 5 times that of Earth)
in uninhabitable, hot inner
orbits closer to their star than
even Mercury around our Sun (NASA Kepler news release; and JPL news release).
In October 2011, a
closer orbit of Vesta will enable Dawn to collect
even better images of this protoplanet (NASA science news).
Upon their arrival at the restaurant and walking
in the street afterwards, the couple's physical behavior attracts the gaze of others
even as the intent physical focus and
close friendship of the rendezvous creates an
orbit of grace around their interactions.
Granted, the car's
orbit makes it very unlikely that it will ever come
close to Earth again, but its launch initiated a debate over whether or not wealthy CEOs can simply launch whatever they want
in space,
even if it serves no scientific or economic purpose.