Evolution of a Planetary System
... 1. Review. Remind the students that in the last Mission, they learned how planets may form around a star. But are all stars the same? Now we will study how stars can vary in their color and temperature. Star types were first invented to identify stars with different colors. For example, our Sun is a ...
... 1. Review. Remind the students that in the last Mission, they learned how planets may form around a star. But are all stars the same? Now we will study how stars can vary in their color and temperature. Star types were first invented to identify stars with different colors. For example, our Sun is a ...
5 Understanding stars and star ClUsters
... As the star compresses from its original cloud it finally begins to shine forth, creating a solar wind, which eventually disperses the cloud from which it formed. This process occurs throughout the cloud of gas and dust, and on most occasions more than one object is formed. Some will be small and me ...
... As the star compresses from its original cloud it finally begins to shine forth, creating a solar wind, which eventually disperses the cloud from which it formed. This process occurs throughout the cloud of gas and dust, and on most occasions more than one object is formed. Some will be small and me ...
27B Star Life Cycle and the HR Diagram
... all of the known stars were put on their graph, several obvious groups became apparent. By examining the differences in these groups, later astronomers were able to realize that the groups were best described as stars in different periods in their life cycle, rather than completely different types o ...
... all of the known stars were put on their graph, several obvious groups became apparent. By examining the differences in these groups, later astronomers were able to realize that the groups were best described as stars in different periods in their life cycle, rather than completely different types o ...
Lecture18
... • Stars come in many luminosities • If astronomers could tell what the luminosity of a star ...
... • Stars come in many luminosities • If astronomers could tell what the luminosity of a star ...
Lesson Plan G2 The Stars
... good indicator of its distance. In Starry Night they will examine several different stars and they will see how some stars end their lives. ...
... good indicator of its distance. In Starry Night they will examine several different stars and they will see how some stars end their lives. ...
Lecture 10 Spectra of Stars and Binaries
... • O B A F G K M L T Subdivide each class into numbered subclasses: ...
... • O B A F G K M L T Subdivide each class into numbered subclasses: ...
Classifying the Spectra of Stars:
... M-stars are very cool and typically have broad features. They usually have strong sodium but it’s broader than it is in a K star. M-stars are a complicated mess that often has very large areas of absorption due to molecules in their atmospheres. We will not be dealing with this spectral type. ...
... M-stars are very cool and typically have broad features. They usually have strong sodium but it’s broader than it is in a K star. M-stars are a complicated mess that often has very large areas of absorption due to molecules in their atmospheres. We will not be dealing with this spectral type. ...
Stars A globular cluster is a tightly grouped swarm of stars held
... about 125 B.C. Hipparchus numbered groups of stars according to their brightness as viewed from Earth. He called the brightest stars first magnitude stars, the next brightest second magnitude stars, and so on to sixth magnitude stars, the faintest visible stars. Modern astronomers refer to a star's ...
... about 125 B.C. Hipparchus numbered groups of stars according to their brightness as viewed from Earth. He called the brightest stars first magnitude stars, the next brightest second magnitude stars, and so on to sixth magnitude stars, the faintest visible stars. Modern astronomers refer to a star's ...
Star
... • When a star explosively brightens, it is called a nova (new star). Excessively large explosions are called supernovas. • During the outburst, the outer layer of the star is ejected at high speed. • After reaching maximum brightness in a few days, the nova slowly returns in a year or so to its orig ...
... • When a star explosively brightens, it is called a nova (new star). Excessively large explosions are called supernovas. • During the outburst, the outer layer of the star is ejected at high speed. • After reaching maximum brightness in a few days, the nova slowly returns in a year or so to its orig ...
Alpha Centauri 3
... refractor at the Royal Observatory. If our own Sun, Sol, were viewed from the Alpha Centauri system, it would be located in Cassiopeia near the border with Perseus and about five degrees north of a double cluster near the nebula IC 1805/1848, visible as a bright yellow star that would be almost as b ...
... refractor at the Royal Observatory. If our own Sun, Sol, were viewed from the Alpha Centauri system, it would be located in Cassiopeia near the border with Perseus and about five degrees north of a double cluster near the nebula IC 1805/1848, visible as a bright yellow star that would be almost as b ...
On the nature of early-type emission line objects in NGC6611
... metallicity (Schaller et al. 1992). A part of stars in the sample (mainly the massive stars) are young and are close to the ZAMS. However, the analysis of our results demonstrates that a group (intermediate mass stars) of our NGC6611 targets have an age too old for the age of this star-formation reg ...
... metallicity (Schaller et al. 1992). A part of stars in the sample (mainly the massive stars) are young and are close to the ZAMS. However, the analysis of our results demonstrates that a group (intermediate mass stars) of our NGC6611 targets have an age too old for the age of this star-formation reg ...
Stars - cayugascience
... If you have ever spent time looking up at the sky on a clear night, you have probably noticed that some stars look as though they are grouped together into a distinct pattern. Perhaps the best-known star pattern in the northern hemisphere is the Big Dipper (Figure 8.1). Different cultures around the ...
... If you have ever spent time looking up at the sky on a clear night, you have probably noticed that some stars look as though they are grouped together into a distinct pattern. Perhaps the best-known star pattern in the northern hemisphere is the Big Dipper (Figure 8.1). Different cultures around the ...
Fulltext PDF
... clusters. Globular clusters are made up of low metallicity, dense aggregates of 50,000–100,000 stars, gravitationally bound with orbits that are randomly distributed, which leads to their spherical shape. The stars are redder, older ≈ 10 Gyr1 and we do not see any signs of SF taking place there. The ...
... clusters. Globular clusters are made up of low metallicity, dense aggregates of 50,000–100,000 stars, gravitationally bound with orbits that are randomly distributed, which leads to their spherical shape. The stars are redder, older ≈ 10 Gyr1 and we do not see any signs of SF taking place there. The ...
Auriga (constellation)
Auriga is one of the 48 constellations listed by the 2nd-century astronomer Ptolemy and remains one of the 88 modern constellations. Located north of the celestial equator, its name is the Latin word for ""charioteer"", associating it with various mythological charioteers, including Erichthonius and Myrtilus. Auriga is most prominent during winter evenings in the Northern Hemisphere, along with the five other constellations that have stars in the Winter Hexagon asterism. Because of its northern declination, Auriga is only visible in its entirety as far as 34° south; for observers farther south it lies partially or fully below the horizon. A large constellation, with an area of 657 square degrees, it is half the size of the largest constellation, Hydra.Its brightest star, Capella, is an unusual multiple star system among the brightest stars in the night sky. Beta Aurigae is an interesting variable star in the constellation; Epsilon Aurigae, a nearby eclipsing binary with an unusually long period, has been studied intensively. Because of its position near the winter Milky Way, Auriga has many bright open clusters in its borders, including M36, M37, and M38, popular targets for amateur astronomers. In addition, it has one prominent nebula, the Flaming Star Nebula, associated with the variable star AE Aurigae.In Chinese mythology, Auriga's stars were incorporated into several constellations, including the celestial emperors' chariots, made up of the modern constellation's brightest stars. Auriga is home to the radiant for the Aurigids, Zeta Aurigids, Delta Aurigids, and the hypothesized Iota Aurigids.