OSP2016Level 3 Map - Oregon Star Party
... What is it? The Pleiades Bubble is the easiest part of the Interstellar Medium (ISM) to see visually. The ISM is a mix of interstellar gas and dust that pervades the Milky Way. Why you want to see it: The Pleiades Bubble surrounds one of the most iconic objects in the sky but observations are rare. ...
... What is it? The Pleiades Bubble is the easiest part of the Interstellar Medium (ISM) to see visually. The ISM is a mix of interstellar gas and dust that pervades the Milky Way. Why you want to see it: The Pleiades Bubble surrounds one of the most iconic objects in the sky but observations are rare. ...
The Case against Copernicus
... phers, amongst which notwithstanding there hath not been any one who hath found out a certain manifestation either of the one or the other.” By Hooke’s time a growing majority of scientists accepted Copernicanism, al though, to a degree, they still did so in the face of scientific difficulties. No ...
... phers, amongst which notwithstanding there hath not been any one who hath found out a certain manifestation either of the one or the other.” By Hooke’s time a growing majority of scientists accepted Copernicanism, al though, to a degree, they still did so in the face of scientific difficulties. No ...
A Search for Exozodiacal Dust and Faint Companions near Sirius
... the circular masked regions. The symmetry planes of the model disks are inclined 30¡ from edge-on. The dust densities in these have been enhanced to more than 105 times solar levels, so they are marginally discernible from the residuals from the point-spread function (PSF) subtraction. We used these ...
... the circular masked regions. The symmetry planes of the model disks are inclined 30¡ from edge-on. The dust densities in these have been enhanced to more than 105 times solar levels, so they are marginally discernible from the residuals from the point-spread function (PSF) subtraction. We used these ...
October 2005 NSTAR - North Houston Astronomy Club
... such as a Telrad, or as important as the proper way to clean your optics (Hacks #34 and #52). But did you know that when you are comfortably seated at your eyepiece (instead of standing) you improve your performance by an amount that is the same as having a telescope up to 2 inches bigger (Hack #60) ...
... such as a Telrad, or as important as the proper way to clean your optics (Hacks #34 and #52). But did you know that when you are comfortably seated at your eyepiece (instead of standing) you improve your performance by an amount that is the same as having a telescope up to 2 inches bigger (Hack #60) ...
November 2015 - Denver Astronomical Society
... by DAS members in anticipation of a large turnout, and the public didn’t disappoint: More than 1,000 people showed up to look at the Moon. The observatory was open, too, and nearly 400 paid to take a peek through the 20-inch Alvan Clark-Saegmuller refractor. Two local TV stations also showed up: New ...
... by DAS members in anticipation of a large turnout, and the public didn’t disappoint: More than 1,000 people showed up to look at the Moon. The observatory was open, too, and nearly 400 paid to take a peek through the 20-inch Alvan Clark-Saegmuller refractor. Two local TV stations also showed up: New ...
the UKIRT Fundamental and Extended lists
... a fixed dynamic range, and as its sensitivity increases, so the brightest measurable sources become fainter. This is well illustrated by developments at UKIRT. After 1985 the IRCAM series of instruments (McLean et al. 1986) became the ‘workhorse’ imagers. The last of these, IRCAM3 (Puxley et al. 199 ...
... a fixed dynamic range, and as its sensitivity increases, so the brightest measurable sources become fainter. This is well illustrated by developments at UKIRT. After 1985 the IRCAM series of instruments (McLean et al. 1986) became the ‘workhorse’ imagers. The last of these, IRCAM3 (Puxley et al. 199 ...
JHK standard stars for large telescopes: the UKIRT Fundamental
... a fixed dynamic range, and as its sensitivity increases, so the brightest measurable sources become fainter. This is well illustrated by developments at UKIRT. After 1985 the IRCAM series of instruments (McLean et al. 1986) became the ‘workhorse’ imagers. The last of these, IRCAM3 (Puxley et al. 199 ...
... a fixed dynamic range, and as its sensitivity increases, so the brightest measurable sources become fainter. This is well illustrated by developments at UKIRT. After 1985 the IRCAM series of instruments (McLean et al. 1986) became the ‘workhorse’ imagers. The last of these, IRCAM3 (Puxley et al. 199 ...
Physics@Brock - Brock University
... 46. The light-gathering power of a telescope is (a) proportional to the distance between the objective and the eyepiece. (b) proportional to the focal length of the objective. (c) proportional to the focal length of the eyepiece. (d) proportional to the cross-sectional area of the objective. (e) pro ...
... 46. The light-gathering power of a telescope is (a) proportional to the distance between the objective and the eyepiece. (b) proportional to the focal length of the objective. (c) proportional to the focal length of the eyepiece. (d) proportional to the cross-sectional area of the objective. (e) pro ...
A History of Astronomy, Astrophysics and Cosmology
... thinking of Aristotle who held that the sphere is the most perfect solid figure in that, when rotated about any diameter, it remains unchanged. The Universe was composed of layer upon layer of perfect spheres and motions of celestial bodies should be circular. The Earth was composed of the four elem ...
... thinking of Aristotle who held that the sphere is the most perfect solid figure in that, when rotated about any diameter, it remains unchanged. The Universe was composed of layer upon layer of perfect spheres and motions of celestial bodies should be circular. The Earth was composed of the four elem ...
High-Speed Ballistic Stellar Interlopers
... approach between two binary star systems—or a binary system and a third star. In such cases, one or more of the stars can pick up enough energy through gravitational interaction with the others to be thrown from the system. Determining how many stars have been ejected from their neighbors is importa ...
... approach between two binary star systems—or a binary system and a third star. In such cases, one or more of the stars can pick up enough energy through gravitational interaction with the others to be thrown from the system. Determining how many stars have been ejected from their neighbors is importa ...
Astrophotography
Astrophotography is a specialized type of photography for recording images of astronomical objects and large areas of the night sky. The first photograph of an astronomical object (the Moon) was taken in 1840, but it was not until the late 19th century that advances in technology allowed for detailed stellar photography. Besides being able to record the details of extended objects such as the Moon, Sun, and planets, astrophotography has the ability to image objects invisible to the human eye such as dim stars, nebulae, and galaxies. This is done by long time exposure since both film and digital cameras can accumulate and sum light photons over these long periods of time. Photography revolutionized the field of professional astronomical research, with long time exposures recording hundreds of thousands of new stars and nebulae that were invisible to the human eye, leading to specialized and ever larger optical telescopes that were essentially big cameras designed to collect light to be recorded on film. Direct astrophotography had an early role in sky surveys and star classification but over time it has given way to more sophisticated equipment and techniques designed for specific fields of scientific research, with film (and later astronomical CCD cameras) becoming just one of many forms of sensor.Astrophotography is a large sub-discipline in amateur astronomy where it is usually used to record aesthetically pleasing images, rather than for scientific research, with a whole range of equipment and techniques dedicated to the activity.