a wide-field survey for variable stars
... The orange star at the center of the image is T Tauri, prototype of the class of T Tauri variable stars. The nearby dusty, yellow cloud is Hind’s Variable Nebula (NGC 1555/1554). Over 400 light-years away, at the edge of a molecular cloud, both star and nebula are seen to vary significantly in brigh ...
... The orange star at the center of the image is T Tauri, prototype of the class of T Tauri variable stars. The nearby dusty, yellow cloud is Hind’s Variable Nebula (NGC 1555/1554). Over 400 light-years away, at the edge of a molecular cloud, both star and nebula are seen to vary significantly in brigh ...
The Reception of the Copernican Revolution
... Adopting the argument provided by Osiander, most scholars of the time considered the Copernican system to be an ingenious mathematical fiction that facilitated and improved the calculation of celestial ephemerides. This could be seen in the Prutenic Tables, calculated by Eramus Reinhold using the he ...
... Adopting the argument provided by Osiander, most scholars of the time considered the Copernican system to be an ingenious mathematical fiction that facilitated and improved the calculation of celestial ephemerides. This could be seen in the Prutenic Tables, calculated by Eramus Reinhold using the he ...
Physics 1114OL - Normandale Community College
... Mid-Term Exam and Final Exam: If you are unable to take the mid-term and final exams at Normandale, they MUST be taken in an approved testing center. Each student is responsible for locating a testing location that will administer and proctor the exams. Most MnSCU colleges and universities can accom ...
... Mid-Term Exam and Final Exam: If you are unable to take the mid-term and final exams at Normandale, they MUST be taken in an approved testing center. Each student is responsible for locating a testing location that will administer and proctor the exams. Most MnSCU colleges and universities can accom ...
Sample pages 1 PDF
... However, he could not explain this possible relationship. Was it that of cause and effect between the two, or was there something else involved that “… gave origin to both the change of weather and the meteors?” (Olmsted 1834a, p. 402). The meteors were at their most striking in frequency and brilli ...
... However, he could not explain this possible relationship. Was it that of cause and effect between the two, or was there something else involved that “… gave origin to both the change of weather and the meteors?” (Olmsted 1834a, p. 402). The meteors were at their most striking in frequency and brilli ...
Mid-infrared imaging of the dust shell around the post
... Fig. 1 shows images of HD 161796 through the narrow-band S 7.9, S 9.8 and S 11.7 filters and the wide-band N and Q3 filters. In the bottom right of each panel we show a contour plot of the Vega observation as an indication of the PSF shape. In the S 7.9 filter, an unresolved peak is seen, which we a ...
... Fig. 1 shows images of HD 161796 through the narrow-band S 7.9, S 9.8 and S 11.7 filters and the wide-band N and Q3 filters. In the bottom right of each panel we show a contour plot of the Vega observation as an indication of the PSF shape. In the S 7.9 filter, an unresolved peak is seen, which we a ...
NICMOS Coronagraphic Observations of 55 Cancri
... images, and then applying the downlinked acquisition slew offsets executed by the NICMOS flight software in the coronagraphic acquisition process. Flux-scaling of the PSF was accomplished by iteratively nulling the diffracted energy in the difference images along the OTA spider vanes while demanding ...
... images, and then applying the downlinked acquisition slew offsets executed by the NICMOS flight software in the coronagraphic acquisition process. Flux-scaling of the PSF was accomplished by iteratively nulling the diffracted energy in the difference images along the OTA spider vanes while demanding ...
Getting an image of Sirius B
... you attempt to see it by taking pictures, it either gets located well within the white saturated area of Sirius A or, if you reduce the exposure time to lower Sirius A's glare, it gets too dim to be seen in the image at all. While orbiting around their center of mass, they have been getting farther ...
... you attempt to see it by taking pictures, it either gets located well within the white saturated area of Sirius A or, if you reduce the exposure time to lower Sirius A's glare, it gets too dim to be seen in the image at all. While orbiting around their center of mass, they have been getting farther ...
THE MONTHLY SKY GUIDE, SIXTH EDITION
... Most bright stars, and several not-so-bright ones, have strangesounding names. Other stars are known merely by letters and numbers. These designations arose in various ways, as follows. A number of star names date back to Greek and Roman times. For example, the name of the brightest star in the sky, ...
... Most bright stars, and several not-so-bright ones, have strangesounding names. Other stars are known merely by letters and numbers. These designations arose in various ways, as follows. A number of star names date back to Greek and Roman times. For example, the name of the brightest star in the sky, ...
Jul 2016 - Bays Mountain Park
... bring a telescope or binoculars, please do so. We will be holding a public star party for the campers in the park. We do this every year since the park lets us use their gazebo at no charge. If the weather is good, we can probably expect to see quite a few campers up on top of the hill. There are ot ...
... bring a telescope or binoculars, please do so. We will be holding a public star party for the campers in the park. We do this every year since the park lets us use their gazebo at no charge. If the weather is good, we can probably expect to see quite a few campers up on top of the hill. There are ot ...
Correcting Systematic Poalrization Effects in Keck LRISp
... The LRISp instrument was upgraded to include a second blue camera which also can be used in polarimetric mode (Cohen 2005; McCarthy et al. 1998). In 2009, the LRIS red detector was upgraded to include higher sensitivity at longer wavelengths (Rockosi et al. 2010). The atmospheric dispersion correcto ...
... The LRISp instrument was upgraded to include a second blue camera which also can be used in polarimetric mode (Cohen 2005; McCarthy et al. 1998). In 2009, the LRIS red detector was upgraded to include higher sensitivity at longer wavelengths (Rockosi et al. 2010). The atmospheric dispersion correcto ...
My Constellation
... glitters with an unusual metallic red while the entire region is bathed in a pale red nebula, lit from the same star. This red supergiant has a visual binary that just might be visible, depending on local conditions and the size of one's scope (see below). The star is estimated to be between 285 sun ...
... glitters with an unusual metallic red while the entire region is bathed in a pale red nebula, lit from the same star. This red supergiant has a visual binary that just might be visible, depending on local conditions and the size of one's scope (see below). The star is estimated to be between 285 sun ...
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.