L'invention du réel : Les dessous philosophiques de l'astronomie

En 1846, après des années de calculs mathématiques basés sur la théorie de la gravitation universelle de Newton, Urbain Le Verrier désigne un point précis dans le ciel, où l on découvre immédiatement une nouvelle planète jusque là invisible, Neptune. Planète mathématique devenue réelle ? Mais comment croire que les belles théories abstraites nées de l imagination des astronomes aient quelque chose à voir avec le réel ? Ce livre aux s...

Planet Formation: Theory, Observations, and Experiments

When this book was published in 2006, it had been just over ten years since the first planet outside our solar system was detected. Since then, much work has focused on understanding how extrasolar planets may form, and discovering the frequency of potentially habitable Earth-like planets. This volume addresses fundamental questions concerning the formation of planetary systems in general, and of our solar system in particular. Drawi...

The Aliens Are Coming!: The Extraordinary Science Behind Our Search for Life in the Universe

Actor and bestselling science writer Ben Miller takes readers to the cutting edge of one of the greatest questions of all: Is there life beyond Earth? For millennia, we have looked up at the stars and wondered whether we are alone in the universe, but in the last few years—as our probes begin to escape the solar system, and our telescopes reveal thousands of Earthlike planets—scientists have taken huge leaps toward an answer. “Forget...

Chimie et changement climatique

Il convient de comprendre les causes de ce changement climatique qui sont complexes : de l’intensité du rayonnement solaire, liée à des variations astronomiques de long terme, aux émissions gazeuses dans l’atmosphère, d’origines naturelles ou anthropiques. Il faut ensuite comprendre comment ces facteurs modifient le climat, prévoir les évolutions, anticiper les changements. Les gaz envoyés dans l’atmosphère, créés par une chimie comp...

Using SI Units in Astronomy

A multitude of measurement units exist within astronomy, some of which are unique to the subject, causing discrepancies that are particularly apparent when astronomers collaborate with researchers from other disciplines in science and engineering. The International System of Units (SI) is based on seven fundamental units from which other units may be derived, but many astronomers are reluctant to drop their old and familiar systems. ...

Revolutionaries of the Cosmos: The Astro-Physicists

Galileo, Newton, Herschel, Huggins, Hale, Eddington, Shapley and Hubble: these astronomers applied ideas drawn from physics to astronomy and made dramatic changes to the world-pictures that they inherited. They showed that celestial objects are composed of the same materials as the earth and that they behave in the same way. They displaced successively the earth, the sun and finally the milky way galaxy from being the centre of the u...

Planetesimals: Early Differentiation and Consequences for Planets

Processes governing the evolution of planetesimals are critical to understanding how rocky planets are formed, how water is delivered to them, the origin of planetary atmospheres, how cores and magnetic dynamos develop, and ultimately, which planets have the potential to be habitable. Theoretical advances and new data from asteroid and meteorite observations, coupled with spacecraft missions such as Rosetta and Dawn, have led to majo...

Beyond Earth: Man's Contact with UFO

Another quality tome on the study of the UFO phenomena. A very no-nonsense approach to a difficult subject. Worthy of an in-depth read by anyone who is attempting LEGITIMATE research in this field. The details of each incident jump off the page and truly make the reader question a lot of preconceived notions.

Zodiac Calendars in the Dead Sea Scrolls and Their Reception

The ancient mathematical basis of the Aramaic calendars in the Dead Sea Scrolls is analysed in this investigation. Helen R. Jacobus re-examines an Aramaic zodiac calendar with a thunder divination text (4Q318) and the calendar from the Aramaic Astronomical Book (4Q208 - 4Q209), all from Qumran. Jacobus demonstrates that 4Q318 is an ancestor of the Jewish calendar today and that it helps us to understand 4Q208 - 4Q209. She argues that...