Groups_of_Stars_spectra
... In space there is no up down left or right, only towards or away • Motion towards & away causes the light given off to be squeezed or stretched • Blue-shift: wavelengths from objects moving toward another get squeezed • Red-shift: wavelengths from objects moving away get stretched ...
... In space there is no up down left or right, only towards or away • Motion towards & away causes the light given off to be squeezed or stretched • Blue-shift: wavelengths from objects moving toward another get squeezed • Red-shift: wavelengths from objects moving away get stretched ...
Problem Sheet for Introduction to Astrophysics
... a) How much brighter will a star of 1st magnitude appear compared with one of 9th magnitude? b) What is the apparent magnitude of a star that appears 2.512 times less bright than the 0th magnitude star Vega? c) Two stars of identical luminosity are observed. The apparent brightness of the more dista ...
... a) How much brighter will a star of 1st magnitude appear compared with one of 9th magnitude? b) What is the apparent magnitude of a star that appears 2.512 times less bright than the 0th magnitude star Vega? c) Two stars of identical luminosity are observed. The apparent brightness of the more dista ...
Arcturus and Pollux
... • “Castor and Pollux” according to Roman mythology. Zeus seduced Leda by disguising himself as a swan. Castor was born by King of Sparta, Pollux by Zeus. Castor died, Pollux wanted to join him in Hades, so Zeus was sympathetic and placed both in the sky. • 17th Brightest star in the sky • 33.7 light ...
... • “Castor and Pollux” according to Roman mythology. Zeus seduced Leda by disguising himself as a swan. Castor was born by King of Sparta, Pollux by Zeus. Castor died, Pollux wanted to join him in Hades, so Zeus was sympathetic and placed both in the sky. • 17th Brightest star in the sky • 33.7 light ...
Study Guide for Stars and the Universe Test
... 5. How does a reflecting telescope differ from a refracting telescope? 6. What happens during the process of nuclear fusion? 7. Why does the Sun shine (give off energy)? 8. Explain the difference between apparent and absolute magnitude. 9. What are the life cycle steps of a medium-sized star like th ...
... 5. How does a reflecting telescope differ from a refracting telescope? 6. What happens during the process of nuclear fusion? 7. Why does the Sun shine (give off energy)? 8. Explain the difference between apparent and absolute magnitude. 9. What are the life cycle steps of a medium-sized star like th ...
Chapter 27 Stars and Galaxies
... Absolute Magnitude Brightness from 32.6 ly Ex: If the sun was 32.6 ly away, it would be a fifth magnitude star. Its absolute magnitude = +5 Most stars are between a -5 and +15 ...
... Absolute Magnitude Brightness from 32.6 ly Ex: If the sun was 32.6 ly away, it would be a fifth magnitude star. Its absolute magnitude = +5 Most stars are between a -5 and +15 ...
What Can We See in the Night Sky?
... • Groups of stars that are close together and travel together are known as star clusters • Star clusters are part of galaxies • Open clusters – contain about 50 to 1000 stars – dispersed along the Milky Way’s main band ...
... • Groups of stars that are close together and travel together are known as star clusters • Star clusters are part of galaxies • Open clusters – contain about 50 to 1000 stars – dispersed along the Milky Way’s main band ...
Document
... j. How is it possible that Canopus is more luminous than Achernar, given their respective spectral types? Canopus is cooler than Achernar; therefore, the only way Canopus can be more luminous is because it is LARGER. 2. List the evolutionary stages of the Sun’s life cycle & describe how its size (Ra ...
... j. How is it possible that Canopus is more luminous than Achernar, given their respective spectral types? Canopus is cooler than Achernar; therefore, the only way Canopus can be more luminous is because it is LARGER. 2. List the evolutionary stages of the Sun’s life cycle & describe how its size (Ra ...
Ch 29 Sun and Solar Activity
... atmosphere, disrupt longrange radios, satell. & radar • solar flame animation ...
... atmosphere, disrupt longrange radios, satell. & radar • solar flame animation ...
Structure of the Universe
... by combining smaller elements to form a larger one, specifically two hydrogen atoms form a helium atom, ...
... by combining smaller elements to form a larger one, specifically two hydrogen atoms form a helium atom, ...
Magnitude Scale
... • Measure of the brightness of a star if observed from 10 parsecs away (equivalent of luminosity) • Denoted by M or MV • Absolute magnitude and apparent magnitude are the same at a distance of 10 parsecs. ...
... • Measure of the brightness of a star if observed from 10 parsecs away (equivalent of luminosity) • Denoted by M or MV • Absolute magnitude and apparent magnitude are the same at a distance of 10 parsecs. ...
LIfe of a Star
... Dwarf small hot star that is the leftover center of an older star Final stage Can shine for billions of years before they extinguish Observe life of a star (link) ...
... Dwarf small hot star that is the leftover center of an older star Final stage Can shine for billions of years before they extinguish Observe life of a star (link) ...
AN INTRODUCTION TO ASTRONOMY Dr. Uri Griv Department of Physics, Ben-Gurion University
... R is the radius of a star. On the other hand, L = f · (4πr2 ) → T = (f r2 /R2 σ)1/4 • The basic idea of UBV Photometry is to measure the proportions of radiant energy put out by a thermal body at ultraviolet (U), blue (B), and visual (V) wavelength • fV /fB = function of T fB /fU = function of T • I ...
... R is the radius of a star. On the other hand, L = f · (4πr2 ) → T = (f r2 /R2 σ)1/4 • The basic idea of UBV Photometry is to measure the proportions of radiant energy put out by a thermal body at ultraviolet (U), blue (B), and visual (V) wavelength • fV /fB = function of T fB /fU = function of T • I ...
Stars - Denbigh Baptist Christian School
... Pulsating variable star – swells and gets brighter then shrinks and dims (absolute magnitude change) Eclipsing variable star – pairs of stars that orbit each other because of gravitational pull on each other. (Apparent magnitude change) ...
... Pulsating variable star – swells and gets brighter then shrinks and dims (absolute magnitude change) Eclipsing variable star – pairs of stars that orbit each other because of gravitational pull on each other. (Apparent magnitude change) ...
How Is a Star`s Color Related to Its Temperature?
... How Is a Star’s Color Related to Its Temperature? ...
... How Is a Star’s Color Related to Its Temperature? ...
Beauty and the beast - University of Wyoming
... misconception is that the North Star is the brightest star in the sky. Polaris is the North Star because it is the only star that does not move throughout the night. All of the other stars trace circles around it. Observers will always find it in the same spot – north and 41° above the horizon (for ...
... misconception is that the North Star is the brightest star in the sky. Polaris is the North Star because it is the only star that does not move throughout the night. All of the other stars trace circles around it. Observers will always find it in the same spot – north and 41° above the horizon (for ...
Star Sizes
... Sirius is the brightest star in our night sky. The reason for this is that it is relatively close at only 8.6 light years away. Remember the next nearest star is 4.3 light years away. Sirius is about twice as massive as the Sun but it is 25 times as luminous. It can be found in the constellation Ca ...
... Sirius is the brightest star in our night sky. The reason for this is that it is relatively close at only 8.6 light years away. Remember the next nearest star is 4.3 light years away. Sirius is about twice as massive as the Sun but it is 25 times as luminous. It can be found in the constellation Ca ...
The Evening Sky in February 2016
... soon after sunset. Any telescope will easily show Jupiter's four bright moons. They were first seen by Galileo in 1610. Binoculars, steadily held, often show one or two. Jupiter is 680 million km from us midmonth. The planet is 11 times Earth's diameter and 320 times Earth's mass. The full moon appe ...
... soon after sunset. Any telescope will easily show Jupiter's four bright moons. They were first seen by Galileo in 1610. Binoculars, steadily held, often show one or two. Jupiter is 680 million km from us midmonth. The planet is 11 times Earth's diameter and 320 times Earth's mass. The full moon appe ...
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.