Book contents
- Time: From Earth Rotation to Atomic Physics
- Time: From Earth Rotation to Atomic Physics
- Copyright page
- Dedication
- Contents
- Preface
- 1 Time Before the 20th Century
- 2 Time from the Earth’s Rotation
- 3 Ephemerides
- 4 Variable Earth Rotation
- 5 Earth Orientation
- 6 Ephemeris Time
- 7 Relativity and Time
- 8 Time and Cosmology
- 9 Dynamical and Coordinate Timescales
- 10 Clock Developments
- 11 Microwave Atomic Clocks
- 12 Optical Atomic Standards
- 13 Definition and Role of a Second
- 14 International Atomic Time (TAI)
- 15 Coordinated Universal Time (UTC)
- 16 Time in the Solar System
- 17 Time and Frequency Transfer
- 18 Modern Earth Orientation
- 19 International Activities
- 20 Time Applications
- 21 Future of Timekeeping
- Acronyms
- Glossary
- Index
- References
8 - Time and Cosmology
Published online by Cambridge University Press: 01 October 2018
Book contents
- Time: From Earth Rotation to Atomic Physics
- Time: From Earth Rotation to Atomic Physics
- Copyright page
- Dedication
- Contents
- Preface
- 1 Time Before the 20th Century
- 2 Time from the Earth’s Rotation
- 3 Ephemerides
- 4 Variable Earth Rotation
- 5 Earth Orientation
- 6 Ephemeris Time
- 7 Relativity and Time
- 8 Time and Cosmology
- 9 Dynamical and Coordinate Timescales
- 10 Clock Developments
- 11 Microwave Atomic Clocks
- 12 Optical Atomic Standards
- 13 Definition and Role of a Second
- 14 International Atomic Time (TAI)
- 15 Coordinated Universal Time (UTC)
- 16 Time in the Solar System
- 17 Time and Frequency Transfer
- 18 Modern Earth Orientation
- 19 International Activities
- 20 Time Applications
- 21 Future of Timekeeping
- Acronyms
- Glossary
- Index
- References
Summary
Significant developments in cosmology and the determination of the age and scale of the universe occurred during the 20th century. The aspect of time in cosmology from the big bang to the expanding universe is considered. According to some physicists, time can proceed in either a forward or backward direction, but the second law of thermodynamics requires entropy to increase with time. Objects seen at great distance display a redshift due to their relative velocity away from Earth that increases with distance, which argues for the expansion of the universe. The history of a universe consisting of matter, radiation, and energy is developed, and possibilities for the future of the universe are considered.
- Type
- Chapter
- Information
- Time: From Earth Rotation to Atomic Physics , pp. 123 - 130Publisher: Cambridge University PressPrint publication year: 2018
References
Chaboyer, B., Demarque, P., Kernan, P. J., & Krauss, L. M. (1998). The Age of the Globular Clusters in the Light of Hipparcos: Resolving the Age Problem? Astrophys. J. 494, 96–110.Google Scholar
Dyson, F. J. (1979). Time without End: Physics and Biology in an Open Universe. Reviews of Modern Physics, 51, 447–460.CrossRefGoogle Scholar
Einstein, A. (1917). Kosmologische betrachtungen zur allgemeinen relativitätstheorie. Sitzungsber. K. Preuss. Akad. Wiss. 142–152. English translation in Lorentz, H. A. et al., eds. 1952. The Principle of Relativity. Mineola, NY: Dover Publications, 175–188.Google Scholar
Freedman, W. L., Kennicutt, R. C., & Mould, J. R. (2009). Measuring the Hubble Constant with the Hubble Space Telescope. Proceedings of the International Astronomical Union, 5, Issue H15, Highlights.Google Scholar
Friedman, A. (1922). Über die Krümmung des Raumes. Zeitschrift für Physik, 10, 377–386, English translation in Friedman, A. (1999) On the curvature of space. General Relativity and Gravitation, 31, 1991–2000.CrossRefGoogle Scholar
Friedman, A. (1924). Über die Möglichkeit einer Welt mit konstanter negativer Krümmung des Raumes. Zeitschrift für Physik A, 21, 326–332, English translation in General Relativity and Gravitation, 31, 31.Google Scholar
Hubble, Edwin (1929). A Relation between Distance and Radial Velocity among Extra-Galactic Nebulae. Proceedings of the National Academy of Sciences of the United States of America, 15, 168–173.CrossRefGoogle ScholarPubMed
Impey, C. (2017). Cosmic Time: From the Big Bang to the Eternal Future. In Arias, E. F., Combrinck, L., Gabor, P., Hohenkerk, C., & Seidelmann, P. K., eds., The Science of Time 2016. Springer.Google Scholar
Lemaître, G. (1927). Un univers homogène de masse constante et de rayon croissant rendant compte de la vitesse radiale des nébuleuses extragalactiques. Annals of the Scientific Society of Brussels (in French). 47A, 41. Translated in: (1931) A Homogeneous Universe of Constant Mass and Growing Radius Accounting for the Radial Velocity of Extragalactic Nebulae. M. N. Roy. Astron. Soc., 91, 483–490.Google Scholar
Lemaître, G. (1933), l’Univers en expansion, Annales de la Société Scientifique de Bruxelles, A 53, 51–85.Google Scholar
Longair, M. S. (2006). The Cosmic Century. Cambridge: Cambridge University Press, 109.Google Scholar
Misner, C. W., Thorne, K. S., & Wheeler, J. A. (1973). Gravitation. New York, NY: W. H. Freeman.Google Scholar
Planck Collaboration. (2014). Planck 2013 results. XVI. Cosmological parameters, arXiv:1303.5076 [astro-ph.CO].Google Scholar
Robertson, H. P. (1935). Kinematics and World Structure. Astrophysical J., 82, 284–301.Google Scholar
Robertson, H. P. (1936a). Kinematics and World Structure II. Astrophysical J., 83, 187–201.CrossRefGoogle Scholar
Robertson, H. P. (1936b). Kinematics and World Structure III. Astrophysical J., 83, 257–271.CrossRefGoogle Scholar
Rugh, S. E. & Zinkernagel, H. (2008). On the physical basis for cosmic time. arXiv:0805.1947v1 [gr-qc].Google Scholar
Rugh, S. E. & Zinkernagel, H. (2016). Limits of time in cosmology. arXiv:1603.05449v1 [gr-qc].Google Scholar
Slipher, V. M. (1917). Radial Velocity Observations of Spiral Nebulae. The Observatory, 40, 304–306.Google Scholar
Spergel, D. N. (2015). The Dark Side of Cosmology: Dark Matter and Dark Energy. Science, 347, 1100–1102.CrossRefGoogle ScholarPubMed
Walker, A. G. (1937). On Milne’s Theory of World-Structure. Proceedings of the London Mathematical Society 2, 42, 90–127.CrossRefGoogle Scholar