Opakování z minulého cvičení
... Josef von Fraunhofer (1787-1826) in 1814. He was the first person to study the rainbow pattern produced by passing light through a prism in detail under intense magnification. He was actually interested in the properties of the glass in the prisms, and how in affected the light, but to his surprise ...
... Josef von Fraunhofer (1787-1826) in 1814. He was the first person to study the rainbow pattern produced by passing light through a prism in detail under intense magnification. He was actually interested in the properties of the glass in the prisms, and how in affected the light, but to his surprise ...
LESSON 8: STARS
... compositions and lifecycles. The largest stars are several hundred times the diameter of the Sun, and in our solar system, would easily engulf the Earth’s orbit, while the smallest stars are smaller than the Earth itself. The most noticeable distinction between stars, however, is the difference in t ...
... compositions and lifecycles. The largest stars are several hundred times the diameter of the Sun, and in our solar system, would easily engulf the Earth’s orbit, while the smallest stars are smaller than the Earth itself. The most noticeable distinction between stars, however, is the difference in t ...
Surveying the Stars
... Direct mass measurements are possible only for stars in binary star systems. ...
... Direct mass measurements are possible only for stars in binary star systems. ...
theh – rdiagramsofyoungclust ersandtheformati on ofp
... In the present paper we shall first make some comments in support of the existence of young stars below the main sequence; next we shall try to explain this peculiarity as the result of the formation of planetary systems around contracting stars. Finally it will be seen how this hypothesis can expl ...
... In the present paper we shall first make some comments in support of the existence of young stars below the main sequence; next we shall try to explain this peculiarity as the result of the formation of planetary systems around contracting stars. Finally it will be seen how this hypothesis can expl ...
AAVSO: Mu Cephei, October 2002 Variable Star Of The Month
... Mu Cep has expanded and cooled and is currently in its red supergiant phase of life. Like other red giants and supergiants, it is unstable and it pulsates. Right now the radial (in-and-out) pulsations are of a small-amplitude (about 1.67 mag), but eventually it will probably pulsate with a large-amp ...
... Mu Cep has expanded and cooled and is currently in its red supergiant phase of life. Like other red giants and supergiants, it is unstable and it pulsates. Right now the radial (in-and-out) pulsations are of a small-amplitude (about 1.67 mag), but eventually it will probably pulsate with a large-amp ...
Andromeda: Daughter of Cassiopeia Ἀνδρομέδη Kaitlyn Heaton
... The Andromeda Galaxy. (Shown in figure 2) is the most distant object visible to the naked eye. You can find this famous galaxy on the right side of Andromeda, about half-way up the constellation. [2] It is a spiral galaxy approximately 2.5 million light years distant. In the past, it was also referr ...
... The Andromeda Galaxy. (Shown in figure 2) is the most distant object visible to the naked eye. You can find this famous galaxy on the right side of Andromeda, about half-way up the constellation. [2] It is a spiral galaxy approximately 2.5 million light years distant. In the past, it was also referr ...
The Sun and Stars 4.1 Energy formation and layers of the Sun 4.2
... from Sol to reach the Earth. Stars are made primarily of hydrogen and helium with trace amounts of other elements. The gravity and heat of the sun cause all of those atoms to be very hot, so hot they are continuously in the plasma phase. Atoms in the plasma are also known as ions and they behave dif ...
... from Sol to reach the Earth. Stars are made primarily of hydrogen and helium with trace amounts of other elements. The gravity and heat of the sun cause all of those atoms to be very hot, so hot they are continuously in the plasma phase. Atoms in the plasma are also known as ions and they behave dif ...
STC-Scripting Guide for Celestia
... Examples 3 and 4 create the same star “My Second Star” with the same characteristics at the same position, which is the position of "First Star". Which method you want to use is more or less your decision. Specifying RA, Dec and Distance is slightly more efficient than OrbitBarycenter, but only at l ...
... Examples 3 and 4 create the same star “My Second Star” with the same characteristics at the same position, which is the position of "First Star". Which method you want to use is more or less your decision. Specifying RA, Dec and Distance is slightly more efficient than OrbitBarycenter, but only at l ...
Stellar Evolution
... reactions to start that are very slow at the ~15 million K temperature maintained by hydrogen fusion Star leaves the main sequence, becomes a red giant! ASTR 1120: Fall 2005 ...
... reactions to start that are very slow at the ~15 million K temperature maintained by hydrogen fusion Star leaves the main sequence, becomes a red giant! ASTR 1120: Fall 2005 ...
ASTRO-114--Lecture 38-
... that on this scale? Well, the Sun is much, much, much brighter than anything else and so you’ve gotta go a whole bunch of magnitudes to get to it. Remember, every five numbers is a factor of 100 more in brightness. The Sun comes out as -26 on that scale. But think about that. I’m able to describe th ...
... that on this scale? Well, the Sun is much, much, much brighter than anything else and so you’ve gotta go a whole bunch of magnitudes to get to it. Remember, every five numbers is a factor of 100 more in brightness. The Sun comes out as -26 on that scale. But think about that. I’m able to describe th ...
The Sculptor dwarf irregular galaxy SDIG: present and past
... galactic H I (Burstein & Heiles 1984). Given that SDIG is more than 10° away from the Sculptor dwarf spheroidal, a direct measurement is preferable. Thus, the authors adopt the RC3 value, namely E(B - v)gal = 0.00 mag. The internal extinction in SDIG is unknown. Based on model fits to optical surfac ...
... galactic H I (Burstein & Heiles 1984). Given that SDIG is more than 10° away from the Sculptor dwarf spheroidal, a direct measurement is preferable. Thus, the authors adopt the RC3 value, namely E(B - v)gal = 0.00 mag. The internal extinction in SDIG is unknown. Based on model fits to optical surfac ...
August 2014 Saguaro Skies
... large, pretty faint, very rich, and pretty condensed. 4 levels of stars: 2 levels of brighter stars and 2 levels of background fainter stars. 60 bright stars, about 200 total stars plus some more haze. The haze resolves occasionally with seeing. Large apertures a must for this one. ...
... large, pretty faint, very rich, and pretty condensed. 4 levels of stars: 2 levels of brighter stars and 2 levels of background fainter stars. 60 bright stars, about 200 total stars plus some more haze. The haze resolves occasionally with seeing. Large apertures a must for this one. ...
A) Polaris B) Betelgeuse C) Procyon B D) Sirius 1. Which star has a
... 32. Compared to the terrestrial planets, the Jovian planets in stage 5 have A) larger diameters B) higher densities C) shorter periods of revolution D) longer periods of rotation 33. Approximately how long ago did stage 4 end and stage 5 begin? A) 1 billion years B) 5 billion years C) 20 billion yea ...
... 32. Compared to the terrestrial planets, the Jovian planets in stage 5 have A) larger diameters B) higher densities C) shorter periods of revolution D) longer periods of rotation 33. Approximately how long ago did stage 4 end and stage 5 begin? A) 1 billion years B) 5 billion years C) 20 billion yea ...
Unit 13―The “Fixed” Stars
... there was” and hence must be the Universe. Now that telescopes are revealing stars whose apparent magnitude is less than 6, and the ancients left us only with a scale that runs from one to six, a method has to be established in order the classify stars as having a magnitude of 7, 8 or even 9. In our ...
... there was” and hence must be the Universe. Now that telescopes are revealing stars whose apparent magnitude is less than 6, and the ancients left us only with a scale that runs from one to six, a method has to be established in order the classify stars as having a magnitude of 7, 8 or even 9. In our ...
13.5 The HR Diagram By the early 1900s, astronomers had learned
... Our study of the HR diagram shows us that most stars fall nicely into one of three regions in the diagram: mainsequence stars, giants, or white dwarfs. Stars in the giant region of the diagram follow no obvious trends as a function of mass or other properties, and neither do the white dwarfs, alth ...
... Our study of the HR diagram shows us that most stars fall nicely into one of three regions in the diagram: mainsequence stars, giants, or white dwarfs. Stars in the giant region of the diagram follow no obvious trends as a function of mass or other properties, and neither do the white dwarfs, alth ...
Stellar Continua
... How do we measure stellar continua? How precisely can we measure them? What are the units? What can we learn from the continuum? ...
... How do we measure stellar continua? How precisely can we measure them? What are the units? What can we learn from the continuum? ...
Omega Centauri
... Proton captiue processes responsible for these anticorrelations are possible only at temperatures of a few 10 million degrees, in the complete CNO cycle (which implies also an O depletion) not reached in present day globular cluster main sequence and red giant stars. ...
... Proton captiue processes responsible for these anticorrelations are possible only at temperatures of a few 10 million degrees, in the complete CNO cycle (which implies also an O depletion) not reached in present day globular cluster main sequence and red giant stars. ...
Star
... • The apparent motion of stars is the motion visible to the unaided eye. • Apparent motion is caused by the movement of Earth. • The rotation of Earth causes the apparent motion of stars sees as though the stars are moving counter-clockwise around the North Star. • Earth’s revolution around the sun ...
... • The apparent motion of stars is the motion visible to the unaided eye. • Apparent motion is caused by the movement of Earth. • The rotation of Earth causes the apparent motion of stars sees as though the stars are moving counter-clockwise around the North Star. • Earth’s revolution around the sun ...
9/28/16 Wednesday Parallax Lab
... The parallax of the pencil depends on the distance the pencil is from you -- the closer the object, the larger the parallax. Thus, although it may have been hard to tell precisely, when the pencil was half the original distance from you, it had twice the parallax; when it was double the original dis ...
... The parallax of the pencil depends on the distance the pencil is from you -- the closer the object, the larger the parallax. Thus, although it may have been hard to tell precisely, when the pencil was half the original distance from you, it had twice the parallax; when it was double the original dis ...
Presentation - Relativity Group
... shift in theapparent position of a star with respect to more distant stars as the Earth moves around the Sun. ...
... shift in theapparent position of a star with respect to more distant stars as the Earth moves around the Sun. ...
Canis Minor
Canis Minor /ˌkeɪnɨs ˈmaɪnər/ is a small constellation in the northern celestial hemisphere. In the second century, it was included as an asterism, or pattern, of two stars in Ptolemy's 48 constellations, and it is counted among the 88 modern constellations. Its name is Latin for ""lesser dog"", in contrast to Canis Major, the ""greater dog""; both figures are commonly represented as following the constellation of Orion the hunter.Canis Minor contains only two stars brighter than the fourth magnitude, Procyon (Alpha Canis Minoris), with a magnitude of 0.34, and Gomeisa (Beta Canis Minoris), with a magnitude of 2.9. The constellation's dimmer stars were noted by Johann Bayer, who named eight stars including Alpha and Beta, and John Flamsteed, who numbered fourteen. Procyon is the seventh-brightest star in the night sky, as well as one of the closest. A yellow-white main sequence star, it has a white dwarf companion. Gomeisa is a blue-white main sequence star. Luyten's Star is a ninth-magnitude red dwarf and the Solar System's next closest stellar neighbour in the constellation after Procyon. The fourth-magnitude HD 66141, which has evolved into an orange giant towards the end of its life cycle, was discovered to have a planet in 2012. There are two faint deep sky objects within the constellation's borders. The 11 Canis-Minorids are a meteor shower that can be seen in early December.