The Astronomy Book

DIRECTORY 339 Penrose has proposed a theory of a cyclic cosmology, in which the heat death (end state) of one universe produces ...

340 Absolute magnitude A measure of the intrinsic brightness of a star. It is defined as the apparent magnitude of the star from ...

GLOSSARY 341 Degeneracy pressure An outward pressure within a concentrated ball of gas, such as a collapsed star, that is exerte ...

342 Light-year (ly) A unit of distance that is the distance traveled by light in one year, equal to 5,878 million miles (9,460 b ...

343 Stellar parallax See parallax. Subatomic particle One of the many kinds of particle that are smaller than atoms. These inclu ...

344 Numbers in bold refer to a main entry 40 Eridani 141, 178 51 Pegasi-b (Bellerophon) 290, 291, 293 67P/Churyumov–Gerasimenko ...

INDEX 345 C Caesar, Julius 28 calendars 28–9 Callisto 62, 63 camera obscuras 49 Cannon, Annie Jump 111, 113, 120, 124–7, 133, 13 ...

346 INDEX Einstein, Albert 150 , 170, 171, 329–30 cosmological constant 176, 177, 300, 303 general theory of relativity 14, 68, ...

INDEX 347 K Kant, Immanuel 158, 161, 250 Kappa Andromedae b 293 Kapteyn, Jacobus 119, 164–5, 337 Keck Observatory (Hawaii) 292, ...

348 INDEX Large Space Telescope (LST) 192–3 laser interferometry 330 Lassell, William 106 Late Heavy Bombardment 313 Le Verrier, ...

INDEX 349 protostars 276–9 Ptolemy, Claudius 18, 19, 21, 22, 23, 24–5, 27, 30, 31, 34, 35, 36, 37, 38, 39, 46, 47, 64, 71, 79, 8 ...

350 INDEX Roll, Peter 224, 225 Rømer, Ole 78, 148, 335 Röntgen, Wilhelm 111, 214 Rosetta spacecraft 206, 207, 308 –11 Rosse, Wil ...

INDEX 351 Swedenborg, Emanuel 92 Swift, Jonathan 62 T Tarter, Jill 339 Taylor, Joseph 236 Taylor, Matt 310 technology 15, 258–9 ...

352 ACKNOWLEDGMENTS Dorling Kindersley would like to thank Allie Collins, Sam Kennedy, and Kate Taylor for additional editorial ...