By Mike Brown
The sun procedure so much people grew up with integrated 9 planets, with Mercury closest to the solar and Pluto on the periphery. Then, in 2005, astronomer Mike Brown made the invention of a life-time: a 10th planet, Eris, a little bit larger than Pluto. yet rather than its leading to yet one more planet being additional to our sun approach, Brown’s locate ignited a firestorm of controversy that riled the often sedate global of astronomy and introduced him into the general public eye. the talk culminated within the demotion of Pluto from genuine planet to the newly coined type of “dwarf” planet. by surprise Brown used to be receiving hate mail from schoolchildren and being bombarded by means of television reporters—all as a result of the discovery he had spent years trying to find and an entire life dreaming about.
Filled with either humor and drama, How I Killed Pluto and Why It Had It Coming is Mike Brown’s attractive first-person account of the main tumultuous yr in sleek astronomy—which he inadvertently prompted. because it publications readers via very important clinical thoughts and evokes us to imagine extra deeply approximately our position within the cosmos, it's also an unique and enlightening own tale: whereas Brown sought to extend our knowing of the large nature of area, his personal existence used to be replaced within the such a lot fast, human methods by means of love, delivery, and loss of life. A heartfelt and private standpoint at the demotion of everyone’s favourite farflung planet, How I Killed Pluto and Why It Had It Coming is the booklet for someone, younger or previous, who has ever dreamed of exploring the universe—and who between us hasn’t?
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Extra resources for How I Killed Pluto and Why It Had It Coming
Other APO objective lenses may depend on three or four elements, one of which will certainly be made of calcium fluorite. APOs, whether of two, three, or four elements, are as free from color error as a lens system can be made. Because it is truly color-free, an APO telescope can be manufactured with a shorter focal length than the standard achromatic refractor, reducing the overall package length and making for a more portable telescope. However, due to the manufacturing costs of additional lens elements, an APO telescope is quite expensive.
Besides the safety factor provided by solar projection, a distinct advantage of this technique is that it is convenient for group observing. Usually the viewing screen will be positioned to show the whole disc of the Sun. Observers can be arranged around the screen, each with a clear view of the photosphere. For educational purposes, or casual observing of white light features, this technique works splendidly. In order to see features clearly, projection is done onto a white Bristol board or card stock.
These are filters intended to screw into the barrel of an eyepiece to facilitate direct viewing of the Sun. The filter is no more than a very dense-colored glass. When placed at the focal plane of a telescope pointed toward the Sun, the filter will eventually shatter from the concentrated heat, exposing the eye to the blinding light and heat of the Sun. I will never forget the awakening experience I had of pointing my first telescope fitted with one of these filters toward the Sun. After stepping away for a few moments to retrieve my notebook, then hearing the ominous snap of cracking glass, I returned to find a beam of white sunlight streaming out of the eyepiece.
How I Killed Pluto and Why It Had It Coming by Mike Brown