Download A Question and Answer Guide to Astronomy by Pierre-Yves Bely PDF

By Pierre-Yves Bely

Amazon has performed a disservice to these folks that acquired this publication to work out the colourful illustrations within the iPad and iPhone. All colour has been stripped.
Many figures depend on colour differentiation to explain and clarify the content material. the colour must have been retained, on the grounds that now the kindle books could be learn on many units, together with desktops, that supply colour. another way, the booklet description in amazon may still supply a disclaimer.
I do have one other kindle e-book that i will learn in colour at the cellphone, computer and iPad, so it isn't a rule that each one kindle books are intrinsically black and white.

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Extra info for A Question and Answer Guide to Astronomy

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In stars of intermediate mass like our Sun, the energy from the core flows by radiation in the inner region, and convection is restricted to the outer layer, meaning that only the hydrogen in the core can be consumed. Once that hydrogen is exhausted, the core contracts under pressure from upper layers. This in turn raises the core’s temperature and allows hydrogen fusion to proceed in a spherical shell surrounding it. This new release of energy now forces the outer layers of the stellar atmosphere to expand, and the star has become a red giant.

And as for black holes, here we are dealing with the ultimate concentration of matter (Q. 145). Low-mass stars can live for hundreds of billions of years. Stars of average mass, like the Sun, are stable and spend about 10 billion years on the main sequence, then 100 million years in the red-giant phase. High-mass stars spend about 70 million years on the main sequence, then 5 million in their supergiant phase. Supernova explosions only last for about 10 s, but the residual object remains bright for months.

We call these starry patterns “constellations,” from the Latin cum, meaning with, together, and stella, star. The ancient Sumerians gave us the constellations Taurus (in Latin, the bull), Leo (the lion), and Scorpius (the scorpion), animals that were important in their culture. ” And if it was up to us to baptize a new pattern in the sky today, we might “see” a car, a plane, or . . Elvis. Not all peoples saw the same patterns in the stars. Amerindians, Mayas, African tribes, the ancient Greeks, the Chinese, all imagined different images using different groupings of heavenly bodies.

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