«We imagined we were going to
find other planetary systems in our own image,» says Andrew Howard, an astronomer at the University of Hawaii.
Not exact matches
The new
findings are observational evidence supporting the idea that icy bodies are also present in
other planetary systems, and have survived throughout the history of the star's evolution.
Julia Fang and Jean - Luc Margot at the University of California, Los Angeles, wanted to
find out whether
other planetary systems are full, or if they also have unoccupied but stable orbital slots in between their planets.
It's too early to tell what
other surprises GPI and SPHERE may
find in the outer reaches of
planetary systems.
The
findings offer additional insight into the unusual and active geology on Pluto and, perhaps,
other bodies like it on the
planetary outskirts of the solar
system.
Wolszczan and
others have already
found more than 40
planetary systems around red giants, allowing them to sketch out how the same process will play out here at home.
«These
findings may have implications for how
planetary systems around
other stars could form and where and how big the planets would be.»
In contrast to the carbon - rich icy material
found in
other double star
systems, the
planetary material identified in the SDSS 1557
system has a high metal content, including silicon and magnesium.
Other astronomers
find the detections convincing, although most reserve the name «planet» for bodies that form within a
planetary system and orbit stars, says theorist Alan Boss of the Carnegie Institution of Washington in Washington, D.C. «They should call them «
planetary - mass brown dwarfs,»» Boss says.
Some of them are orbiting extremely close to their parent star like the 51 Peg
planetary system, while
others are
found to be at distances comparable to where Mars and Jupiter lie in our solar
system.
Almost all the extrasolar
planetary systems known appear very different from the solar
system, but planets like those within the solar
system would with current technology be very difficult to
find around
other stars.
The high precision of the Kepler space telescope has allowed us to detect planets that are the size of Earth and somewhat smaller, but no previous planets have been
found that ar... ▽ More Since the discovery of the first exoplanet we have known that
other planetary systems can look quite unlike our own.
A new study led by Western University's all - star cosmochemist Audrey Bouvier proves that the Earth and
other planetary objects formed in the early years of the Solar
System share similar chemical origins — a
finding at odds with accepted wisdom held by scientists for decades.
The new
findings support the notion that belts of icy bodies are also in
other planetary systems, and have persisted throughout their star's development.