Encyclopedia of the Solar System 2nd ed

40 Encyclopedia of the Solar System TABLE 1 Extinct Radionuclides Radionuclide Half-life (million years) Ratio Initial Ratio Sta ...

The Origin of the Solar System 41 Supernovas are sufficiently energetic that they could tear apart a molecular cloud core rather ...

42 Encyclopedia of the Solar System FIGURE 16 The lifetime of solid particles orbiting at 1 AU from the Sun in the minimum-mass ...

The Origin of the Solar System 43 is time for their mutual gravitational attraction to focus their trajectories toward each othe ...

44 Encyclopedia of the Solar System them. For conditions likely to exist in the solar nebula, the net result was that each embry ...

The Origin of the Solar System 45 The abundances of the highly siderophile elements in Earth’s mantle are higher than one would ...

46 Encyclopedia of the Solar System wheretCHURis the time of separation from a CHondritic Uniform Reservoir,λ=(ln 2/half-life) i ...

The Origin of the Solar System 47 mass for most of its history. The spectrum of asteroid Vesta, located 2.4 AU from the Sun, sho ...

48 Encyclopedia of the Solar System and argon, compared to the Sun. It is thought likely that these enrichments extend deep into ...

The Origin of the Solar System 49 the disk around Jupiter’s orbit, balancing viscous forces that would cause gas to flow back in ...

50 Encyclopedia of the Solar System mantle to coalesce with Earth’s core. Molten and vapor- ized mantle material from both bodie ...

The Origin of the Solar System 51 Unfortunately, the Doppler method determines only one component of the star’s velocity, so the ...

52 Encyclopedia of the Solar System had finished forming. For some time it has been postulated that Earth formed in a very dry e ...

100-C 25-C 50-C 75-C C+M 50-C+M C+Y 50-C+Y M+Y 50-M+Y 100-M 25-M 50-M 75-M 100-Y 25-Y 50-Y 75-Y 100-K 25-K 25-19-19 50-K50-40-40 ...

54 Encyclopedia of the Solar System astronomy was his teaching that all heavenly bodies must be spherical, as that is the perfec ...

A History of Solar System Studies 55 Epicycle Deferent Centre of deferent Equant point O Earth M E C Planet FIGURE 2 Ptolemy mod ...

56 Encyclopedia of the Solar System in Tycho’s new model of the universe, all the planets, ex- cept the Earth, orbit the Sun as ...

A History of Solar System Studies 57 Earth and Sun. Although Thomas Harriot and Galileo had both seen sunspots telescopically in ...

58 Encyclopedia of the Solar System TABLE 1 Key Solar System Discoveries and Observations, 1630–1700 Sun-Earth distance 1672 Ric ...

A History of Solar System Studies 59 TABLE 2 A Comparison of Newton’s Results (Relative to the Sun) with Modern Values Mass Dens ...