Chemical and Isotopic Composition Measurements on Atmospheric Probes Exploring Uranus and NeptuneDescent probeInstrumentationAtmosphereUranusNeptuneMass spectrometrySo far no designated mission to either of the two ice giants, Uranus and Neptune, exists. Almost all of our gathered information on these planets...
The spacecraft were to study the atmosphere, surface features, and geologic composition of Pluto and Charon, then fly by Pluto into the Kuiper Disk, a ring filled with hundreds of thousands of small, icy objects that are well-preserved remnants of the early solar system. This ring is ...
andcompositionof ice androckmade it ananomalyamong the other recognized planets. After many more Pluto-sized and smaller icy objects were found orbiting beyond Neptune beginning in the 1990s, astronomers recognized that Pluto, far from being unique in its part of the solar system, is almost undou...
In later decades, however, Pluto’s planetary status became increasingly questioned by astronomers who noted that its tiny size, unusual orbital characteristics, and composition of ice and rock made it an anomaly among the other recognized planets. After many more Pluto-sized and smaller icy ...
The ratio of the average mass per atom of an isotope to 1/12 the mass of a carbon-12 atom. Relative atomic mass is also known as atomic weight (symbol: Ar). Notes (U) Standard Atomic Weight U: 238.02891(3) Isotopic Composition23899.27%23899.27%2340.01%2340.01%2350.72%2350.72% Description...
The ratio of the average mass per atom of an isotope to 1/12 the mass of a carbon-12 atom. Relative atomic mass is also known as atomic weight (symbol: Ar). Notes (U) Standard Atomic Weight U: 238.02891(3) Isotopic Composition23899.27%23899.27%2340.01%2340.01%2350.72%2350.72%...
ATMOSPHERIC compositionSCIENTIFIC apparatus & instrumentsREMOTE sensing of the atmosphereMASS spectrometryATMOSPHEREMASS spectrometersSo far no designated mission to either of the two ice giants, Uranus and Neptune, exists. Almost all of our gathered information on these planets comes from remote sensing. ...