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... Scientists have studied stars to discover how stars evolve. They know that stars form in a nebula when clouds of dust and gas are pulled together by gravity. Describe how this process continues for stars much more massive than the Sun. ...
... Scientists have studied stars to discover how stars evolve. They know that stars form in a nebula when clouds of dust and gas are pulled together by gravity. Describe how this process continues for stars much more massive than the Sun. ...
- Cosmotography
... of a low-surface-brightness substructure and provide its basic characteristics (similar techniques were used with larger galaxies in Martı́nez-Delgado et al. 2008, 2010). The second is follow-up imaging with the Subaru telescope to map out the resolved stellar populations. We obtained very deep imag ...
... of a low-surface-brightness substructure and provide its basic characteristics (similar techniques were used with larger galaxies in Martı́nez-Delgado et al. 2008, 2010). The second is follow-up imaging with the Subaru telescope to map out the resolved stellar populations. We obtained very deep imag ...
bservatory ontrol and stronomical nalysis
... 7 XEphem -- ephemeris planning and mapping tool . . . . . . . . . . . . . . . . . . 7-1 8 Command line tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1 9 Remote Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
... 7 XEphem -- ephemeris planning and mapping tool . . . . . . . . . . . . . . . . . . 7-1 8 Command line tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1 9 Remote Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
Astronomy and Astrophysics 336, 972, 1998
... Sun as a target for repeated Doppler imaging, but we emphasize that the Doppler-imaging technique per se requires a much more rapidly rotating star than the Sun and our target, with its relatively short period, thus still remains a poor comparison with the Sun. Our chosen star is the single K2-dwarf ...
... Sun as a target for repeated Doppler imaging, but we emphasize that the Doppler-imaging technique per se requires a much more rapidly rotating star than the Sun and our target, with its relatively short period, thus still remains a poor comparison with the Sun. Our chosen star is the single K2-dwarf ...
Asteroid Rotation Periods
... Early brightness measurements of asteroids revealed both periodic timedependent variations and a phenomenon called the opposition effect (this is the sudden rise of the asteroid’s brightness when it’s very close to opposition). However, from photometric measurements in the visual wavelengths alone, ...
... Early brightness measurements of asteroids revealed both periodic timedependent variations and a phenomenon called the opposition effect (this is the sudden rise of the asteroid’s brightness when it’s very close to opposition). However, from photometric measurements in the visual wavelengths alone, ...
MEarth
... with precise infrared photometric monitoring as a large daynight temperature difference, while the detection of a small day-night difference would provide a strong case for the existence of a thick atmosphere. With the Spitzer Space Telescope and the James Webb Space Telescope (JWST), atmospheric ob ...
... with precise infrared photometric monitoring as a large daynight temperature difference, while the detection of a small day-night difference would provide a strong case for the existence of a thick atmosphere. With the Spitzer Space Telescope and the James Webb Space Telescope (JWST), atmospheric ob ...
Interacting Galaxies
... While galaxies collide, with very rare exceptions, the stars within them do not. This is because so much of a galaxy is simply empty space, with distances between stars about 100 million times larger than their stellar diameters. What collides is the gas and dust between the stars, which produces a ...
... While galaxies collide, with very rare exceptions, the stars within them do not. This is because so much of a galaxy is simply empty space, with distances between stars about 100 million times larger than their stellar diameters. What collides is the gas and dust between the stars, which produces a ...
3. Chapter 12
... colour of the spectrum represents a different wavelength. A spectroscope is an optical instrument that acts like a prism to separate light into its basic component colours. A spectroscope allows astronomers to view the spectral patterns produced by individual stars. ...
... colour of the spectrum represents a different wavelength. A spectroscope is an optical instrument that acts like a prism to separate light into its basic component colours. A spectroscope allows astronomers to view the spectral patterns produced by individual stars. ...
has occurred over the past 14 billion years COSMIC DOWNSIZING
... which objects are in front and which are more distant — among the thousands of galaxies in a typical deep-field image. The standard way to perform this task is to obtain a spectrum of each galaxy in the image and measure its redshift. Because of the universe’s expansion, the light from distant sourc ...
... which objects are in front and which are more distant — among the thousands of galaxies in a typical deep-field image. The standard way to perform this task is to obtain a spectrum of each galaxy in the image and measure its redshift. Because of the universe’s expansion, the light from distant sourc ...
Galaxy Hunters Article, Cosmology Information, First Star Facts
... star—and there was light. Elsewhere the same star-forming process had begun in other gas clouds that Abel refers to as microgalaxies—miniature, single-starred versions of today's galaxies. Soon beacons of light from massive stars permeated the darkness. These stars burned brightly and then fizzled a ...
... star—and there was light. Elsewhere the same star-forming process had begun in other gas clouds that Abel refers to as microgalaxies—miniature, single-starred versions of today's galaxies. Soon beacons of light from massive stars permeated the darkness. These stars burned brightly and then fizzled a ...
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.