D

1950 DA (asteroid) 56

Dactyl (moonlet) 11, 77-78, 158

5335 Damocles (body) 81

Darwin, Charles 45

Dawn (spacecraft) 161

Deep Impact (spacecraft) 161, C-8

Deep Space Network 54

Deep Space 1 (spacecraft) 128, 159

Defense Support Program, U.S. 20

Deimos (moon) 49, 69

density of solar system 147, 147-148 and spherical shape 90, 92 deserts, meteorites in 110 Devon Islands (Canada) C-2 diamonds 104—105 differentiation 90-94 dimensional analysis 36 diogenites 106, 107 Dione (planet) xiii, xiii direct orbits 3, 3^ drag 36-37 DSS-14 (antennae) 54 D-type asteroids 117, 121 Duncan, Martin 134—135 dust from comets 131-132, 142 in Kuiper belt 142 and meteor showers 153 dust tails 124 2004 DW (object) 146

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