... study the impact of a strong flare from the M dwarf, AD Leo, on the atmospheric chemistry of a hypothetical Earth-like planet located in the habitable zone. The simulations were performed using a 1-D photochemical model. We simulated six atmospheres with high concentrations of CO2 and CH4 . The resp ...
Disk-planet interaction
... As long as there is some gas in the corotational region (say, +- 20% of orbital radius of a jupiter), eccentricity is strongly damped. Only if and when the gap becomes so wide that the near-lying LRs are eliminated, eccentricity is excited. (==> planets larger than 10 m_jup were predicted to be on e ...
... As long as there is some gas in the corotational region (say, +- 20% of orbital radius of a jupiter), eccentricity is strongly damped. Only if and when the gap becomes so wide that the near-lying LRs are eliminated, eccentricity is excited. (==> planets larger than 10 m_jup were predicted to be on e ...
Journey to the Stars Educator`s Guide
... • The stellar life cycle continues today. Stars still form, live, and die. The young Orion Nebula contains one of many clusters of newborn stars in the Milky Way. Some of them are just forming planets. The Pleiades, a mature star cluster, is ejecting stars. The Helix Nebula was expelled by a star at ...
... • The stellar life cycle continues today. Stars still form, live, and die. The young Orion Nebula contains one of many clusters of newborn stars in the Milky Way. Some of them are just forming planets. The Pleiades, a mature star cluster, is ejecting stars. The Helix Nebula was expelled by a star at ...
19. Our Galaxy 19.1 The Milky Way Revealed Our goals for learning
... reflection nebulae in the gas and dust around them. High-mass stars tend to be clustered together, so their neighborhoods are likely to have gas bubbles and shock waves from the winds and supernovae produced by nearby stars. ...
... reflection nebulae in the gas and dust around them. High-mass stars tend to be clustered together, so their neighborhoods are likely to have gas bubbles and shock waves from the winds and supernovae produced by nearby stars. ...
Archaeology of the Milky Way - Max-Planck
... astronomers has now even analyzed data from almost a billion stars. This, too, has led the researchers to enter the business of big data mining. But what is the point of all this? “If you want to investigate the evolution of galaxies such as the Milky Way, there are two possibilities,” says Rix. “On ...
... astronomers has now even analyzed data from almost a billion stars. This, too, has led the researchers to enter the business of big data mining. But what is the point of all this? “If you want to investigate the evolution of galaxies such as the Milky Way, there are two possibilities,” says Rix. “On ...
Sky Maps Teacher`s Guide - Northern Stars Planetarium
... number of circumpolar constellations you see depends on your latitude. The further north or south you travel from the equator, the more stars become circumpolar. At the equator, no stars are circumpolar. At the poles, all stars are circumpolar. Clusters of stars are found all over the sky. There are ...
... number of circumpolar constellations you see depends on your latitude. The further north or south you travel from the equator, the more stars become circumpolar. At the equator, no stars are circumpolar. At the poles, all stars are circumpolar. Clusters of stars are found all over the sky. There are ...
Evolution of Warm Debris Around Sun-like Stars: Clues to Terrestrial
... after start of growth. Compare to Rieke et al. (2005). A star surveys sensitive to more massive dust belts compared to G star surveys (using colors). Expectations of planetesimal formation between A stars and G stars. A star debris disks seen by Rieke et al. are MORE MASSIVE. FLUX-DISK/FLUX-STAR = S ...
... after start of growth. Compare to Rieke et al. (2005). A star surveys sensitive to more massive dust belts compared to G star surveys (using colors). Expectations of planetesimal formation between A stars and G stars. A star debris disks seen by Rieke et al. are MORE MASSIVE. FLUX-DISK/FLUX-STAR = S ...
on the mass distribution of stars in the solar neighbourhood
... been regularly used by Belgrade astronomers for the purpose of mass estimation in the case of components of binary stars (e.g. Trajkovska and Ninković 1997). As binaries also allow to check the results by using the masses determined dynamically, it has been possible to test Angelov’s relation inten ...
... been regularly used by Belgrade astronomers for the purpose of mass estimation in the case of components of binary stars (e.g. Trajkovska and Ninković 1997). As binaries also allow to check the results by using the masses determined dynamically, it has been possible to test Angelov’s relation inten ...
The Properties of Stars Early in its history, the universe organized
... low as 1.1 for some to as high as 6 for others. The North Star, Polaris, is an example of a low-amplitude (that is, a low maximum-to-minimum luminosity ratio) Cepheid variable. In the early part of this century, astronomer Henrietta Leavitt identified 25 Cepheid variables in the Small Magellanic Clo ...
... low as 1.1 for some to as high as 6 for others. The North Star, Polaris, is an example of a low-amplitude (that is, a low maximum-to-minimum luminosity ratio) Cepheid variable. In the early part of this century, astronomer Henrietta Leavitt identified 25 Cepheid variables in the Small Magellanic Clo ...
A billion pixels, a billion stars
... higher), and there may be as many as 70 000 such planets in orbit around nearby stars. These nearby systems make good targets for detailed follow-up measurements using large ground-based telescopes or special-purpose space observatories. In addition to its huge numbers, the Gaia exoplanet sample has ...
... higher), and there may be as many as 70 000 such planets in orbit around nearby stars. These nearby systems make good targets for detailed follow-up measurements using large ground-based telescopes or special-purpose space observatories. In addition to its huge numbers, the Gaia exoplanet sample has ...
EvoluGon of high mass stars Solar-‐type stars end their lives by
... type Ib (there are no hydrogen lines in the spectrum, indica=ng that the hydrogen envelope was lost before the explosion) type Ic (no hydrogen or helium lines, so all the hydrogen and ...
... type Ib (there are no hydrogen lines in the spectrum, indica=ng that the hydrogen envelope was lost before the explosion) type Ic (no hydrogen or helium lines, so all the hydrogen and ...
PDF only - at www.arxiv.org.
... over one billion years, in a sample of such systems. If a terrestrial planet could exist in a stable orbit for this length of time it is likely to be able to exist there for the duration of that star’s main sequence lifetime. A putative terrestrial planet may exist in an orbit that is not only stabl ...
... over one billion years, in a sample of such systems. If a terrestrial planet could exist in a stable orbit for this length of time it is likely to be able to exist there for the duration of that star’s main sequence lifetime. A putative terrestrial planet may exist in an orbit that is not only stabl ...
an Educator`s GuidE
... observing the effects they have on their parent stars. These effects, driven by gravity and line-of-sight, are visible to us as either periodic dimming (called “transits”) or shifting wavelengths within the electromagnetic spectrum (referred to as a “wobble”). To find a world capable of supporting l ...
... observing the effects they have on their parent stars. These effects, driven by gravity and line-of-sight, are visible to us as either periodic dimming (called “transits”) or shifting wavelengths within the electromagnetic spectrum (referred to as a “wobble”). To find a world capable of supporting l ...
The Next Great Exoplanet Hunt Please share
... wavelength. In essence, a small signal must be split into even smaller ones, an endeavour only feasible if the signal-to-noise ratio is very high at the outset. And this is only possible for bright stars. The Kepler stars are typically more than a million times fainter than the brightest naked-eye s ...
... wavelength. In essence, a small signal must be split into even smaller ones, an endeavour only feasible if the signal-to-noise ratio is very high at the outset. And this is only possible for bright stars. The Kepler stars are typically more than a million times fainter than the brightest naked-eye s ...
PHYS_3380_082615_bw - The University of Texas at Dallas
... them to tell what month it is. For example, Scorpius is only visible in the northern hemisphere's evening sky in the summer. - many of the myths associated with the constellations thought to have been invented to help the farmers remember them - made up stories about them ...
... them to tell what month it is. For example, Scorpius is only visible in the northern hemisphere's evening sky in the summer. - many of the myths associated with the constellations thought to have been invented to help the farmers remember them - made up stories about them ...
File - Adriana Romo
... Scientific: They contain as much mass as the sun. Interviewer: How much volume do white dwarfs contain? Scientist: They could contain as much as earth. Interviewer: What is the ultimate fate for the stars like the sun? Scientist: Upon its dead, a low mass star slowly collapse to become a white dwarf ...
... Scientific: They contain as much mass as the sun. Interviewer: How much volume do white dwarfs contain? Scientist: They could contain as much as earth. Interviewer: What is the ultimate fate for the stars like the sun? Scientist: Upon its dead, a low mass star slowly collapse to become a white dwarf ...
ASTRONOMY AND ASTROPHYSICS Letter to the Editor Low
... subsequent exposures per waveband and night, and careful eyeinspection showed that all sources have been efficiently removed using our modified median filtering technique which returns the lower 1/3 instead of the mean (1/2) value. We subtracted the sky-background and flat-fielded each exposure usin ...
... subsequent exposures per waveband and night, and careful eyeinspection showed that all sources have been efficiently removed using our modified median filtering technique which returns the lower 1/3 instead of the mean (1/2) value. We subtracted the sky-background and flat-fielded each exposure usin ...
an Educator`s GuidE
... observing the effects they have on their parent stars. These effects, driven by gravity and line-of-sight, are visible to us as either periodic dimming (called “transits”) or shifting wavelengths within the electromagnetic spectrum (referred to as a “wobble”). To find a world capable of supporting l ...
... observing the effects they have on their parent stars. These effects, driven by gravity and line-of-sight, are visible to us as either periodic dimming (called “transits”) or shifting wavelengths within the electromagnetic spectrum (referred to as a “wobble”). To find a world capable of supporting l ...
an Educator`s GuidE - Museum of Science, Boston
... observing the effects they have on their parent stars. These effects, driven by gravity and line-of-sight, are visible to us as either periodic dimming (called “transits”) or shifting wavelengths within the electromagnetic spectrum (referred to as a “wobble”). To find a world capable of supporting l ...
... observing the effects they have on their parent stars. These effects, driven by gravity and line-of-sight, are visible to us as either periodic dimming (called “transits”) or shifting wavelengths within the electromagnetic spectrum (referred to as a “wobble”). To find a world capable of supporting l ...
Lyra
Lyra (/ˈlaɪərə/; Latin for lyre, from Greek λύρα) is a small constellation. It is one of 48 listed by the 2nd century astronomer Ptolemy, and is one of the 88 constellations recognized by the International Astronomical Union. Lyra was often represented on star maps as a vulture or an eagle carrying a lyre, and hence sometimes referred to as Aquila Cadens or Vultur Cadens. Beginning at the north, Lyra is bordered by Draco, Hercules, Vulpecula, and Cygnus. Lyra is visible from the northern hemisphere from spring through autumn, and nearly overhead, in temperate latitudes, during the summer months. From the southern hemisphere, it is visible low in the northern sky during the winter months.The lucida or brightest star—and one of the brightest stars in the sky—is the white main sequence star Vega, a corner of the Summer Triangle. Beta Lyrae is the prototype of a class of stars known as Beta Lyrae variables, binary stars so close to each other that they become egg-shaped and material flows from one to the other. Epsilon Lyrae, known informally as the Double Double, is a complex multiple star system. Lyra also hosts the Ring Nebula, the second-discovered and best-known planetary nebula.