New Mass Loss Measurements from Astrospheric Lyα Absorption
... those in this high-activity regime. Thus, the location of y Boo is shown in Figure 3b in order to infer what the solar wind might have been like at times earlier than t p 0.7 Gyr. The history of the solar wind is not only of interest to solar/ stellar astronomers but is also important for planetary ...
... those in this high-activity regime. Thus, the location of y Boo is shown in Figure 3b in order to infer what the solar wind might have been like at times earlier than t p 0.7 Gyr. The history of the solar wind is not only of interest to solar/ stellar astronomers but is also important for planetary ...
Starburst Galaxies Under the Microscope: High
... The Antennae system (NGC 4038/4039) is the nearest major merger of two large spiral galaxies. Since the beginning of the interaction the system went through several episodes of violent star formation, of which the last one is probably still ongoing. The resulting star clusters have been studied exte ...
... The Antennae system (NGC 4038/4039) is the nearest major merger of two large spiral galaxies. Since the beginning of the interaction the system went through several episodes of violent star formation, of which the last one is probably still ongoing. The resulting star clusters have been studied exte ...
Distance determination for RAVE stars using stellar models
... spirals, and finally dwarf galaxies. The power spectrum is used to measure the power of density perturbations on a certain scale. The current cosmological model predicts a HarrisonZel’dovich spectrum (P (k) ∝ k, where k is the wavenumber). This power spectrum predicts more power on small scale, so t ...
... spirals, and finally dwarf galaxies. The power spectrum is used to measure the power of density perturbations on a certain scale. The current cosmological model predicts a HarrisonZel’dovich spectrum (P (k) ∝ k, where k is the wavenumber). This power spectrum predicts more power on small scale, so t ...
Mergers of massive main sequence binaries
... with the assumption of no mass loss and homogeneous mixing during the merging process. We find that there are two types of mergers which result from different phases of mass transfer. Both of these types have relatively low hydrogen content which leads to high luminosities. We then used the data of ...
... with the assumption of no mass loss and homogeneous mixing during the merging process. We find that there are two types of mergers which result from different phases of mass transfer. Both of these types have relatively low hydrogen content which leads to high luminosities. We then used the data of ...
Kepler Mission: The Search for Earth-sized Planets
... For which of these star(s) will Kepler be able to detect transiting planets? ...
... For which of these star(s) will Kepler be able to detect transiting planets? ...
Quasars- The Brightest Black Holes
... reveals the range of velocities of the atoms within the cloud. There will be simple random jostling movements because the atoms always have an average energy related to their temperature; this produces a predictable thermal broadening, where the width of the line depends only on the temperature and ...
... reveals the range of velocities of the atoms within the cloud. There will be simple random jostling movements because the atoms always have an average energy related to their temperature; this produces a predictable thermal broadening, where the width of the line depends only on the temperature and ...
Ground-Based Astrometry 2010-2020
... samples by a factor of ten (or more) in the coming decade. • What is the distribution of luminous and dark matter in the Galactic disk? Different surveys give conflicting results, although there may be some convergence towards the amount of luminous matter being substantial and the amount of dark ma ...
... samples by a factor of ten (or more) in the coming decade. • What is the distribution of luminous and dark matter in the Galactic disk? Different surveys give conflicting results, although there may be some convergence towards the amount of luminous matter being substantial and the amount of dark ma ...
4-H MOTTO
... light whereas planets and the moon reflect sunlight and do not create their own light. Human eyes are capable of seeing only a tiny fraction of the entire light spectrum. Light is not just what we can see; the light spectrum also includes microwaves, radio waves, infrared light, xrays and gamma rays ...
... light whereas planets and the moon reflect sunlight and do not create their own light. Human eyes are capable of seeing only a tiny fraction of the entire light spectrum. Light is not just what we can see; the light spectrum also includes microwaves, radio waves, infrared light, xrays and gamma rays ...
Part IV: Stars
... interior, photons can only travel a fraction of a millimeter before “colliding” with an electron and deflecting into a new direction. So photons bounce around at random and only slowly make their way out of the Sun. Mathematical models use the observed composition and mass of the Sun, along with the ...
... interior, photons can only travel a fraction of a millimeter before “colliding” with an electron and deflecting into a new direction. So photons bounce around at random and only slowly make their way out of the Sun. Mathematical models use the observed composition and mass of the Sun, along with the ...
VENUS: The Dual Goddess and Star Goddess
... This, I believe, has a fuller and richer psychological implication for the person who possesses the Uranian (Evening Star) Venus versus the Pandemos (Morning Star) Venus. The Pandemos Venus is one who inhabits the earth, is connected to the physical world and the physical sensations of the body, and ...
... This, I believe, has a fuller and richer psychological implication for the person who possesses the Uranian (Evening Star) Venus versus the Pandemos (Morning Star) Venus. The Pandemos Venus is one who inhabits the earth, is connected to the physical world and the physical sensations of the body, and ...
A History of Star Catalogues - The Albuquerque Astronomical Society
... whether it was really compiled into catalogue form is unclear. No written copy of the catalogue exists today. In whatever form, it may have contained 1025 to 1080 stars. The coordinate system Hipparchus used isn’t known. It was undertaken upon the appearance of a new star, or nova. The instrument th ...
... whether it was really compiled into catalogue form is unclear. No written copy of the catalogue exists today. In whatever form, it may have contained 1025 to 1080 stars. The coordinate system Hipparchus used isn’t known. It was undertaken upon the appearance of a new star, or nova. The instrument th ...
Activity III: Calibrating Images
... total Counts for a star. These routines are designed to subtract background light caused by other objects and give only the Counts created by the star itself. The brightness of the stars in an image also depends on the exposure time for the observation. If the telescope observes the star for a longe ...
... total Counts for a star. These routines are designed to subtract background light caused by other objects and give only the Counts created by the star itself. The brightness of the stars in an image also depends on the exposure time for the observation. If the telescope observes the star for a longe ...
The extreme ultraviolet and X-ray Sun in Time: High
... at these ages (with 230, 134, and 36 stars, respectively at the considered ages). We use additional constraints for pre-mainsequence (PMS) rotation from the ≈2 Myr cluster NGC 6530 (28 stars; Henderson & Stassun 2012) and the ≈12 Myr cluster h Per (117 stars; Moraux et al. 2013). For NGC 6530, the 1 ...
... at these ages (with 230, 134, and 36 stars, respectively at the considered ages). We use additional constraints for pre-mainsequence (PMS) rotation from the ≈2 Myr cluster NGC 6530 (28 stars; Henderson & Stassun 2012) and the ≈12 Myr cluster h Per (117 stars; Moraux et al. 2013). For NGC 6530, the 1 ...
Chapter 7: The Galaxy, structure and content File
... appear for stars of all ages. (And these are clumps only in velocity space, not in real space.) The idea that there are groups of stars at similar velocities is itself not new—it actually dates from the early proper motion measurements of nearly a century ago. But these ‘streams’ have generally been ...
... appear for stars of all ages. (And these are clumps only in velocity space, not in real space.) The idea that there are groups of stars at similar velocities is itself not new—it actually dates from the early proper motion measurements of nearly a century ago. But these ‘streams’ have generally been ...
Comparison of low- and high-mass star formation
... constantly replenished by the global collapse. The most massive object is located near the minimum of the global potential well and accretes the global collapse-fed material at a rate higher than any other object. Nevertheless, its accretion rate is only ∼10% of the total rate. In other words, the v ...
... constantly replenished by the global collapse. The most massive object is located near the minimum of the global potential well and accretes the global collapse-fed material at a rate higher than any other object. Nevertheless, its accretion rate is only ∼10% of the total rate. In other words, the v ...
Nulling Interferometer
... Chiang and Goldreich (1997) have created models to explain the spectral energy distribution of T Tauri stars and Herbig Ae/Be stars. Disk would be only 0.2” across, so too small for direct imaging detection, but would not have a null of < 40\%. ...
... Chiang and Goldreich (1997) have created models to explain the spectral energy distribution of T Tauri stars and Herbig Ae/Be stars. Disk would be only 0.2” across, so too small for direct imaging detection, but would not have a null of < 40\%. ...
Compare/Order Decimals
... Write each decimal in standard form and expanded form. C. eleven and two hundredths ...
... Write each decimal in standard form and expanded form. C. eleven and two hundredths ...
- Cosmotography
... A candidate diffuse stellar substructure was previously reported in the halo of the nearby dwarf starburst galaxy NGC 4449 by Karachentsev et al. We map and analyze this feature using a unique combination of deep integrated-light images from the Black Bird 0.5-meter telescope, and high-resolution wi ...
... A candidate diffuse stellar substructure was previously reported in the halo of the nearby dwarf starburst galaxy NGC 4449 by Karachentsev et al. We map and analyze this feature using a unique combination of deep integrated-light images from the Black Bird 0.5-meter telescope, and high-resolution wi ...
The 2006 RBSE Journal - National Optical Astronomy Observatory
... Significant variation was detected; and there were a couple of microvariability events in the graph. The time scale if the change is such that something exceptionally small must have interfered with the flux to cause it. With changes happening over the course of just a few minutes could be caused by ...
... Significant variation was detected; and there were a couple of microvariability events in the graph. The time scale if the change is such that something exceptionally small must have interfered with the flux to cause it. With changes happening over the course of just a few minutes could be caused by ...
Cygnus (constellation)
Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.