Not exact matches
Rings are common sights
around the four largest planets of the
solar system, but astronomers reported in March that they had found the celestial circles
around an unexpected and much smaller fifth target: an
asteroid named (10199) Chariklo.
Here's our original story, published on 27 October:
Around the world, telescopes are swiveling to welcome, and then wave farewell to, a new guest to the
solar system: a fast - moving
asteroid, or potentially a comet.
Such a sequence of events, on a much larger scale, may explain the birth of our own Moon in the early days of the
Solar System, as well as the origin of many other satellites
around planets and
asteroids.
The ring
system around the icy
asteroid Chariklo is the first found encircling anything in our
solar system other than a gas giant.
Previous spacecraft launched under New Frontiers include New Horizons, which surveyed Pluto and is now due to visit MU69, an icy object in the farthest reaches of the
solar system; Juno, now in orbit
around Jupiter; and OSIRIS - REx, launched last year, which will collect samples from an
asteroid and return them to Earth.
And what is instead merely a «small
solar system body,» the default category for the tens of thousands of
asteroids and comets floating
around the sun?
Since slipping into orbit
around the
solar system's second-most massive
asteroid last July, NASA's Dawn spacecraft has confirmed Vesta's status as a body whose arrested growth denied it true planethood.
Around 252 km in diameter, the metallic «M - class»
asteroid 16 Psyche is the target of NASA's next mission to the belt of giant rocks that encircles the inner
solar system.
It is also thought that some of the more irregular moons in the
solar system, including Phobos and Deimos
around Mars, may be captured
asteroids.
My research is in celestial mechanics, including the architecture of extra-
solar planetary
systems, debris disks
around stars, the Kuiper belt and
asteroid belt, orbital resonances, and meteoritic bombardment on planets in the
solar system.
The orbit of an Earth - like planet (with liquid water)
around 79 Ceti may be centered
around 1.41 AUs — within the inner reaches of the Main
Asteroid Belt in the
Solar System — with an orbital period of 611 days (or 1.67 years).
The orbit of an Earth - like planet (with liquid water)
around Star A may be centered as close as 1.8 AU — between the orbital distances of Mars and the Main
Asteroid Belt in the
Solar System — with an orbital period of 2.2 years.
The orbit of an Earth - like planet (with liquid water)
around Star A may be centered
around 1.7 AU — between the orbital distances of Mars and the Main
Asteroid Belt in the
Solar System — with an orbital period
around 2.1 years.
An Earth - type planet could have liquid water in a stable orbit centered
around 3.5 AU (within a predicted habitable zone ranging between 2.3 and 4.8 AUs) from Star A — between the orbital distances of the Main
Asteroid Belt and Jupiter in the
Solar System (NASA Stars and Exoplanet Database).
On July 14, 2011, NASA announced that its Dawn spacecraft should be captured by Vesta's gravity and into its orbit
around 1 AM EDT, on Saturday, July 16, 2011 (10 PM PDT, Friday, July 15th), at a distance of approximately 9,900 miles (16,000 kilometers) from the
Solar System's second largest, Main - Belt
asteroid.