Poor Pluto is crowded by thousands
of other icy bodies in the outer solar system, some bigger than Pluto itself, so it fails the test.
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.
The
other suggests they arose in a two - stage process called core accretion, in which bits
of material smashed and fused together to form bigger rocky,
icy bodies.
The missing chunk could be due to a giant impact, smashing away part
of KBO's
icy mantle, or it could mean Quaoar is actually a «contact binary,» consisting
of two more - or-less spherical
bodies that touch each
other.
The
other two gaps are 100 AU and 160 AU from the central star, well beyond the extent
of our solar system's Kuiper Belt, the region
of icy bodies beyond the orbit
of Neptune.
New Horizons also could potentially take a close - up look at a smaller, more ancient object much farther out in the Kuiper Belt: the disk - shaped region beyond the orbit
of Neptune believed to contain comets, asteroids and
other small,
icy bodies.
Like
other teams positioned in a 1500 - kilometer - wide swath across South America, the astronomers had started out the night with one mission: They intended to measure the size
of Chariklo, an
icy body that circles the sun between the orbits
of Saturn and Uranus.
«Although toxic to us, carbon monoxide is one
of many gases found in comets and
other icy bodies,» Aki Roberge, an astrophysicist at NASA, said in a statement.
The observations suggest that the dust was created by collisions in a Edgeworth - Kuiper - like belt
of icy bodies, and that the orbital asymmetry could be an indication that the dust is being shepherded by an unseen planetary companion — among
other explanations (Eiroa et al, 2010).
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.
Had I known I'd be sleeping at
icy campsites, and pushing my
body's ability to cope with altitudes over 15,400 feet, I might have had second thoughts about the three - day trek from Urubamba (in the Sacred Valley
of Peru) to Lares hot springs, 20 km away on the
other side
of a mountain range that we had to climb over.