By Mark Gallaway
Observational Astrophysics follows the final define of an astrophysics undergraduate curriculum concentrating on functional watching info to what is going to be coated on the college point. This comprises the fundamentals of optics and coordinate structures to the technical information of CCD imaging, photometry, spectography and radio astronomy. normal adequate for use via scholars at a number of associations and complicated adequate to be way more important than staring at courses specific at amateurs, the writer presents a finished and up to date remedy of observational astrophysics at undergraduate point for use with a university’s educating telescope. the sensible strategy takes the reader from simple first 12 months recommendations to these required for a last yr venture. utilizing this textbook as a source, scholars can simply develop into acquainted with the sensible points of astrophysics within the box instead of the classroom.
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Extra resources for An Introduction to Observational Astrophysics
Examples of robotic telescopes are the Open University’s Pirate instrument in Majorca and the University of Hertfordshire’s Chris Kitchin and Robert Priddy telescopes which are both located in the UK. 3 Eyepieces and Additional Optics Although you will be mostly observing objects using a camera or spectrograph there will be occasions where you will want to observe an object with the naked eye. In which case you will need an eyepiece. Eyepieces come in a number or optical designs, barrel widths, focal lengths and eye relief.
Multiple designs of equatorial mounts exist, the German Equatorial (Fig. 6) being one of the more popular. Equatorial mounts tend to be heavy due the amount of counterweighting needed and need a larger dome to house them than Alt Az telescopes. They also suffer from what is known as Meridian Flip. Meridian Flip occurs, not unsurprisingly, when the telescope transits the meridian. In order to stop the telescope hitting the mount the telescope must be re-orientated or flipped. This means that if you are performing a series of observations of an object, there will be a break as the object crosses the median, the very best place to image.
Huygens eyepieces have now been largely replaced by more modern designed. However the Huygens design does not have any optical bonding between the optics. Optical bonding degrades over time and in particular when exposed to very bright light. Hence when observing the Sun via the projection method as discussed in Chap. 12 Huygens eyepieces hold a distinct advantage. The Ramsden eyepiece is no longer in wide use and like the Huygens it is a two piece lens but in this case the lenses are reversed with reduces chromatic aberration.
An Introduction to Observational Astrophysics by Mark Gallaway