Circumstellar Disks: IRAS to ALMA (by way of HST) Dr. Karl Stapelfeldt
... Geoff, Karl, & Chas representing The DUNES Team ...
... Geoff, Karl, & Chas representing The DUNES Team ...
Spectroscopy: Unlocking the Secrets of Star Light
... 90% compared with about 1% for photographic emulsions. This means a CCD can convert almost 9 out of 10 incident photons into useful information compared with about 1 in 100 for film. Using a CCD an astronomer can therefore obtain a useful spectrum much quicker than using a photographic plate and can ...
... 90% compared with about 1% for photographic emulsions. This means a CCD can convert almost 9 out of 10 incident photons into useful information compared with about 1 in 100 for film. Using a CCD an astronomer can therefore obtain a useful spectrum much quicker than using a photographic plate and can ...
A Star - Cloudy Nights
... Double Star Two thirds of all stars in the sky have a companion star. These double stars, or binary star systems have two stars that orbit around a common point. Some double stars orbit each other very quickly (once every few hours), while some orbit each other very slowly (once every few thousand y ...
... Double Star Two thirds of all stars in the sky have a companion star. These double stars, or binary star systems have two stars that orbit around a common point. Some double stars orbit each other very quickly (once every few hours), while some orbit each other very slowly (once every few thousand y ...
Object fitting to the bispectral phase by using least
... A function with zero Fourier phase cannot be reconstructed from the phase alone. More important, however, is the possibility that a solution fk' = fk f instead of fk is found, where fk' is a function with zero Fourier phase.7 22 Then fk and fk' have the same Fourier phase and the same error sum. Thi ...
... A function with zero Fourier phase cannot be reconstructed from the phase alone. More important, however, is the possibility that a solution fk' = fk f instead of fk is found, where fk' is a function with zero Fourier phase.7 22 Then fk and fk' have the same Fourier phase and the same error sum. Thi ...
Comprehensive search for natural satellites of Vesta by the Dawn
... Vesta ranges from 1.77 to 159 h for orbits from 1 to 20 Vestan radii. The variation in the duration of the OpNavs allows for detection of motion of potential satellites across more than one pixel. 2.2. Satellite search mosaic The satellite search mosaic images extended 5000 km (20 Vestan radii) fro ...
... Vesta ranges from 1.77 to 159 h for orbits from 1 to 20 Vestan radii. The variation in the duration of the OpNavs allows for detection of motion of potential satellites across more than one pixel. 2.2. Satellite search mosaic The satellite search mosaic images extended 5000 km (20 Vestan radii) fro ...
Dark Matter Search
... • Gamma rays tracing hadronic processes are of particular interest for neutrino observations. • Neutrino observations may be critical to learning the nature of gamma-ray sources. – The Universe is mainly transparent to gamma rays with energies less than 20 GeV, so they can probe distant or obscured ...
... • Gamma rays tracing hadronic processes are of particular interest for neutrino observations. • Neutrino observations may be critical to learning the nature of gamma-ray sources. – The Universe is mainly transparent to gamma rays with energies less than 20 GeV, so they can probe distant or obscured ...
An Expanded View of the Universe
... introduced his laws of planetary motion for the Solar System. The year 1609 signalled a true revolution in astronomy. Since then, astronomical observations with tele scopes have increasingly become the norm, until today, when institutes around the world host giant telescopes that work every availa ...
... introduced his laws of planetary motion for the Solar System. The year 1609 signalled a true revolution in astronomy. Since then, astronomical observations with tele scopes have increasingly become the norm, until today, when institutes around the world host giant telescopes that work every availa ...
The Kuiper Belt Explored by Serendipitous Stellar Occultations
... atmosphere with a typical vertical resolution of a few kilometers. Furthermore, depending on the quality and completeness of the dataset, this technique has sometimes been applied to determine local density variations, atmospheric composition, the presence of aerosol content, zonal wind speed, and t ...
... atmosphere with a typical vertical resolution of a few kilometers. Furthermore, depending on the quality and completeness of the dataset, this technique has sometimes been applied to determine local density variations, atmospheric composition, the presence of aerosol content, zonal wind speed, and t ...
Discovery of an Unusual Optical Transient with the Hubble Space
... types, is not matched to any spectrum in the Sloan Digital Sky Survey (SDSS) database. We suggest that the transient may be one of a new class. Subject headings: stars: variables: other — stars: individual (SCP 06F6) — supernovae: general 1. INTRODUCTION ...
... types, is not matched to any spectrum in the Sloan Digital Sky Survey (SDSS) database. We suggest that the transient may be one of a new class. Subject headings: stars: variables: other — stars: individual (SCP 06F6) — supernovae: general 1. INTRODUCTION ...
The Sky This Month
... a SBIG STL11000M CCD Camera, various filters and 5.4 hours of exposure time. ...
... a SBIG STL11000M CCD Camera, various filters and 5.4 hours of exposure time. ...
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.