April 2016
... 800 nanometers all the way out to 1.6 microns, Hubble became sensitive to light that was severely stretched and redshifted by the expansion of the universe. The most energetic light that hot, young, newly forming stars produce is the Lyman-α line, which is produced at an ultraviolet wavelength of ju ...
... 800 nanometers all the way out to 1.6 microns, Hubble became sensitive to light that was severely stretched and redshifted by the expansion of the universe. The most energetic light that hot, young, newly forming stars produce is the Lyman-α line, which is produced at an ultraviolet wavelength of ju ...
Untitled - Warren Astronomical Society
... Amateur Astronomy. Sometimes, however, we amateurs get so good that we start to be "professionals" and in the process perhaps lose track of the word "amateur". It is therefore my wish to draw on even a larger group of our membership to participate in our general meetings. I have heard comments that ...
... Amateur Astronomy. Sometimes, however, we amateurs get so good that we start to be "professionals" and in the process perhaps lose track of the word "amateur". It is therefore my wish to draw on even a larger group of our membership to participate in our general meetings. I have heard comments that ...
December 2007 Clear Skies Newsletter PDF
... It was not until the year 1543 when the great Polish astronomer Nicolaus Copernicus (1473-1543) had his lifelong work "De revolutionibus" published, that the secret of the odd retrograde loops were finally revealed. By demoting the Earth from its hallowed position at the center of the solar system a ...
... It was not until the year 1543 when the great Polish astronomer Nicolaus Copernicus (1473-1543) had his lifelong work "De revolutionibus" published, that the secret of the odd retrograde loops were finally revealed. By demoting the Earth from its hallowed position at the center of the solar system a ...
Binary Star Systems Discussion Points 1. What characteristic of a
... 13. Which light curve shows a system where the two stars are the most different from one another? 14. Which light curve shows a system where the two stars are the most similar to one another? 15. Label the primary and secondary minimums on the V809 Cygnii curve. 16. For the V809 Cygnii light curve, ...
... 13. Which light curve shows a system where the two stars are the most different from one another? 14. Which light curve shows a system where the two stars are the most similar to one another? 15. Label the primary and secondary minimums on the V809 Cygnii curve. 16. For the V809 Cygnii light curve, ...
No. 53 - Institute for Astronomy
... star that can been seen as eclipses, or transits, at Earth (left). Earth can be detected by the same effect, but only in the plane of Earth’s orbit (the ecliptic). During the K2 mission, many of the extrasolar planets discovered by the Kepler telescope will have this lucky double cosmic alignment th ...
... star that can been seen as eclipses, or transits, at Earth (left). Earth can be detected by the same effect, but only in the plane of Earth’s orbit (the ecliptic). During the K2 mission, many of the extrasolar planets discovered by the Kepler telescope will have this lucky double cosmic alignment th ...
Astronomy 20 Homework # 2
... 1. What are the apparent bolometric magnitudes of: (a) a Sun-like star 50 pc away? (b) a 100 Watt lightbulb 10 km away? (c) a galaxy containing ∼ 3 × 1010 stars of an average luminosity ∼ 0.5L⊙ 20 Mpc away? (d) A quasar with luminosity LQ = 1046 erg/s 1 Gpc away? (Assume for simplicity that all of t ...
... 1. What are the apparent bolometric magnitudes of: (a) a Sun-like star 50 pc away? (b) a 100 Watt lightbulb 10 km away? (c) a galaxy containing ∼ 3 × 1010 stars of an average luminosity ∼ 0.5L⊙ 20 Mpc away? (d) A quasar with luminosity LQ = 1046 erg/s 1 Gpc away? (Assume for simplicity that all of t ...
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.