By Kenneth Lang

This quantity of Astrophysical information offers with Planets and Stars; a moment quantity, half II, will provide information for Galaxies and the Universe. They either professional­ vide uncomplicated info to be used by way of all scientists, from the novice astronomer to the pro astrophysicist. during this first quantity, we not just offer actual parameters of planets, stars and their setting, yet we additionally give you the celestial coordinates required to watch them. the following we use c.g.s. devices, for they're the main known in astron­ omy and astrophysics; yet our quantity starts with astronomical and actual constants and the conversion components wanted for different devices. the subsequent part issues the planets and their satellites; it singles out the Earth and Moon for unique therapy. Spacecraft rendezvous with the planets and satellites have ended in better values for his or her atmospheric compositions, orbital parameters, magnetic fields, lots, radii, rotation classes, and floor pressures and temperatures. This part additionally comprises facts for the asteroids, comets and their particles. We then speak about daily stars, starting with the sunlight, and carrying on with with easy stellar info, the brightest stars and close by stars. designated different types of stars, resembling the Wolf-Rayet stars, magnetic stars, flare stars, and RS CVn binary stars, are included.

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Extra resources for Astrophysical Data: Planets and Stars

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93 "Equatorial radii and oblateness for Venus, Earth and Mars from Pettengill et al. (1980), Clemence (1965) and Lindal et al. (1979), respectively. Reciprocal masses MelMp, are from the Jet Propulsion Laboratory ephemeris, courtesy of J. Myles Standish, Jr. (1988). 9891 x 1033 grams. Planetary masses, M p , in units of the Earth's mass, ME, are calculated from the ratio of the relevant reciprocal masses. 010 "Rotation periods for Mercury and Venus are from Klassen (1976) and Shapiro, Campbell and De Campli (1979), respectively.

52 3. 4 X 10- 4 ? 8 X 10- 5 ? 8 X 10- 5 ? 011 ? ? ? 8 X 10- 5 ? "Adapted from Baugher (1988). Ratios of the numbers of atoms. 033, respectively, Pollack (1984), Conrath et al. (1987). 72 51,402 Thickness (km) ~ ~ Optical Depth 3 30 20,000 X 10- 5 ~ 7 X 10- 6 • RJ = 71,398 km. 7922 R J ). Adopted from Burns, Showalter and Morfill (1984). 685 X 1029 grams. 4 X 1022 grams. A total ring mass of ~ 3 x 10- 8 Ms is obtained from radio occultation studies assuming particles composed of solid water ice.

7922 R J ). Adopted from Burns, Showalter and Morfill (1984). 685 X 1029 grams. 4 X 1022 grams. A total ring mass of ~ 3 x 10- 8 Ms is obtained from radio occultation studies assuming particles composed of solid water ice. The main rings are warped with a total vertical extent of ~ 1 km, but they are locally only 5 to 50 meters thick. Adapted from Tyler et al. (1982), Zebker and Tyler (1984) and Cuzzi et al. (1984). 54 3. 956 300,000 1,000 10- 6 to 10- 7 Thickness (km) Optical Depth 10- 2 to 1 • Rs = 60,330 km.

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