Application Exercise: Distances to Stars Using Measured Parallax
... of the measured parallax method to determine distances to nearby stars, those within about 650 light years from the Sun. Even when observed with the largest telescopes, stars are still just points of light. Although we may be able to tell a lot about a star through its light, these observations do n ...
... of the measured parallax method to determine distances to nearby stars, those within about 650 light years from the Sun. Even when observed with the largest telescopes, stars are still just points of light. Although we may be able to tell a lot about a star through its light, these observations do n ...
Sample pages 1 PDF
... An attentive observer will soon notice that individual bright stars that are rather close together in the sky seem to form simple geometric shapes – squares, rhombuses, crosses, circles, arches. Giving a name to these shapes in the sky makes them more familiar to you and easier to locate again. That ...
... An attentive observer will soon notice that individual bright stars that are rather close together in the sky seem to form simple geometric shapes – squares, rhombuses, crosses, circles, arches. Giving a name to these shapes in the sky makes them more familiar to you and easier to locate again. That ...
PH607 – Galaxies
... brighter spiral nebulae spectroscopically. Spectra show emission lines from hot gas, absorption lines from stars. Radial velocities are nearly all positive with values up to several hundred km/s - later to be determined to be due to the expansion of the Universe. 1915: Harlow Shapley (1885-1972) use ...
... brighter spiral nebulae spectroscopically. Spectra show emission lines from hot gas, absorption lines from stars. Radial velocities are nearly all positive with values up to several hundred km/s - later to be determined to be due to the expansion of the Universe. 1915: Harlow Shapley (1885-1972) use ...
3 - Celestial Sphere
... SCP) and imaginary lines such as the Celestial Equator (CE) positioned on this sphere. Earth is located at the sphere’s center. Currently, the North Celestial Pole is very close to a star called Polaris. 2) The ecliptic is the apparent annual path of the Sun on the Celestial Sphere. Notice that the ...
... SCP) and imaginary lines such as the Celestial Equator (CE) positioned on this sphere. Earth is located at the sphere’s center. Currently, the North Celestial Pole is very close to a star called Polaris. 2) The ecliptic is the apparent annual path of the Sun on the Celestial Sphere. Notice that the ...
13.1 Introduction 13.2 The Red Giant Branch
... Table 13.1 gives some representative values for the sizes and luminosities of red giant stars; a main sequence G V star may end up as a high-K or low-M luminosity class III giant. Note that the values in Table 13.1 depend largely on the spectral type, and not on the mass: stars of a wide range of ma ...
... Table 13.1 gives some representative values for the sizes and luminosities of red giant stars; a main sequence G V star may end up as a high-K or low-M luminosity class III giant. Note that the values in Table 13.1 depend largely on the spectral type, and not on the mass: stars of a wide range of ma ...
Chapter 16 - Astronomy
... 6. In 1930, the interstellar dust was discovered, resolving the conflict between the discoveries of Shapley, Oort, and Lindblad and the star counts of Herschel and Kapteyn. 16-2 Components of the Galaxy 1. The Galaxy contains four components: the disk (which contains the Sun), the nuclear bulge, th ...
... 6. In 1930, the interstellar dust was discovered, resolving the conflict between the discoveries of Shapley, Oort, and Lindblad and the star counts of Herschel and Kapteyn. 16-2 Components of the Galaxy 1. The Galaxy contains four components: the disk (which contains the Sun), the nuclear bulge, th ...
Document
... the most common. And here we come to a most interesting relationship that seems to apply universally, regardless of what sorts of phenomena are being studied. This is the inverse relationship that exists between size and abundance. Astrophysicists have found this relationship to hold, for example, b ...
... the most common. And here we come to a most interesting relationship that seems to apply universally, regardless of what sorts of phenomena are being studied. This is the inverse relationship that exists between size and abundance. Astrophysicists have found this relationship to hold, for example, b ...
Sky-High 2013 - Irish Astronomical Society
... couple of drawbacks. Each chart is correct for only one time on a given night, say 10 p.m. If you are observing two hours later you would need the following month's chart. These charts also show the planets visible for a particular month, so they can be confusing unless you tippex them out. When lea ...
... couple of drawbacks. Each chart is correct for only one time on a given night, say 10 p.m. If you are observing two hours later you would need the following month's chart. These charts also show the planets visible for a particular month, so they can be confusing unless you tippex them out. When lea ...
Entropy
... for relatively well-studied objects, such as, for instance, stars [11-15]. However, it is obvious that such calculations are extremely important for our understanding of the physics of the world around us. So, stars are the most common objects in the Universe, they contain more than 97% of the mass ...
... for relatively well-studied objects, such as, for instance, stars [11-15]. However, it is obvious that such calculations are extremely important for our understanding of the physics of the world around us. So, stars are the most common objects in the Universe, they contain more than 97% of the mass ...
Word version of Episode 704
... Face north, and look for the constellation of stars called the Plough (or the Great Bear Ursa Major). It will be to the north, right ahead of you, and low down. A building or tree in the way could easily hide it. Find the two ‘pointer stars’ at its right-hand end. A line through them going more or l ...
... Face north, and look for the constellation of stars called the Plough (or the Great Bear Ursa Major). It will be to the north, right ahead of you, and low down. A building or tree in the way could easily hide it. Find the two ‘pointer stars’ at its right-hand end. A line through them going more or l ...
On the nature and detectability of Type Ib/c supernova progenitors
... However, rapid expansion of the helium envelope during and after the carbon-burning phase suddenly makes these stars lumi3 ...
... However, rapid expansion of the helium envelope during and after the carbon-burning phase suddenly makes these stars lumi3 ...
Chapter 12
... it becomes a protostar surrounded by a spinning disk of gas. —The protostar may also fire jets of matter ...
... it becomes a protostar surrounded by a spinning disk of gas. —The protostar may also fire jets of matter ...
19. Our Galaxy 19.1 The Milky Way Revealed Our goals for learning
... • What is the significance of a rotation curve that is flat at large distances from the galactic center? • The Milky Way’s flat rotation curve implies that the matter associated with our galaxy extends to large distances from the center. A rotation curve is a plot of the orbital speed of stars or ga ...
... • What is the significance of a rotation curve that is flat at large distances from the galactic center? • The Milky Way’s flat rotation curve implies that the matter associated with our galaxy extends to large distances from the center. A rotation curve is a plot of the orbital speed of stars or ga ...
Cassiopeia (constellation)
Cassiopeia is a constellation in the northern sky, named after the vain queen Cassiopeia in Greek mythology, who boasted about her unrivalled beauty. Cassiopeia was one of the 48 constellations listed by the 2nd-century Greek astronomer Ptolemy, and it remains one of the 88 modern constellations today. It is easily recognizable due to its distinctive 'M' shape when in upper culmination but in higher northern locations when near lower culminations in spring and summer it has a 'W' shape, formed by five bright stars. It is bordered by Andromeda to the south, Perseus to the southeast, and Cepheus to the north. It is opposite the Big Dipper.In northern locations above 34ºN latitude it is visible year-round and in the (sub)tropics it can be seen at its clearest from September to early November in its characteristic 'M' shape. Even in low southern latitudes below 25ºS is can be seen low in the North.