The Night Sky
... Sunflower galaxy- A galaxy in a spiral form discovered in 1779 Whirlpool galaxy- A whirlpool like galaxy. thought to be about 14 million lght years ...
... Sunflower galaxy- A galaxy in a spiral form discovered in 1779 Whirlpool galaxy- A whirlpool like galaxy. thought to be about 14 million lght years ...
Chapter 27 Stars and Galaxies
... The contraction crushes the dense core of the star and become a black hole ...
... The contraction crushes the dense core of the star and become a black hole ...
New Directions in Star Cluster Research
... Theory is validated by observations Evidence often derived from past events Information we can gather is very restricted - apparent brightness (depends on distance), luminosity, temperature, chemical composition, mass, radius ...
... Theory is validated by observations Evidence often derived from past events Information we can gather is very restricted - apparent brightness (depends on distance), luminosity, temperature, chemical composition, mass, radius ...
Astronomy Exam review
... 45. Although Mars and Mercury are nearly equal in size, Mars has more of an atmosphere because Mars is _____ 46. A _____ is a body in the solar system which revolves around another, larger object other than the Sun. 47.The principle element of the atmosphere of Earth is ______ 48.The planets which, ...
... 45. Although Mars and Mercury are nearly equal in size, Mars has more of an atmosphere because Mars is _____ 46. A _____ is a body in the solar system which revolves around another, larger object other than the Sun. 47.The principle element of the atmosphere of Earth is ______ 48.The planets which, ...
Astronomy I Ex.2
... c) 100,000 AU. 2. H0 ' 70 secKm M pc What is the (approximate) age of the universe in Gyr? 3. Convert the following distances in cm to distances in AU: a) Approximate distance from the earth to the sun: 1.44 × 1013 cm b) Approximate distance from the earth to the next nearest star - Alpha Centauri: ...
... c) 100,000 AU. 2. H0 ' 70 secKm M pc What is the (approximate) age of the universe in Gyr? 3. Convert the following distances in cm to distances in AU: a) Approximate distance from the earth to the sun: 1.44 × 1013 cm b) Approximate distance from the earth to the next nearest star - Alpha Centauri: ...
The Evolutionary Cycle of Stars
... The star eventually converts into a Red Giant & expands to up to 100 times the diameter of the original star. Red Giants develop as the hydrogen in the core is depleted. White Dwarf The final evolutionary state whose mass is not too high. This is the last stage of stellar evolution. ...
... The star eventually converts into a Red Giant & expands to up to 100 times the diameter of the original star. Red Giants develop as the hydrogen in the core is depleted. White Dwarf The final evolutionary state whose mass is not too high. This is the last stage of stellar evolution. ...
Locating Objects in Space
... Main Sequence – lifetime determined by amt of fuel available & rate of consumption Greater the star’s mass the faster it burns up its fuel & the shorter the time it will be a main sequence star Some stars spend 90% of life as main sequence star ...
... Main Sequence – lifetime determined by amt of fuel available & rate of consumption Greater the star’s mass the faster it burns up its fuel & the shorter the time it will be a main sequence star Some stars spend 90% of life as main sequence star ...
Astronomy Toolkit
... appears in the sky – Some faint stars are intrinsically bright, but are very distant – Some bright stars are very faint but happen to lie close to us ...
... appears in the sky – Some faint stars are intrinsically bright, but are very distant – Some bright stars are very faint but happen to lie close to us ...
F03HW09
... The luminosity is a measure of the total amount of energy emitted by a star in one second. The absolute visual magnitude is related to the portion of the total luminosity emitted only in the visible portion of the electromagnetic spectrum. Consequently, the absolute visual magnitude ignores energy i ...
... The luminosity is a measure of the total amount of energy emitted by a star in one second. The absolute visual magnitude is related to the portion of the total luminosity emitted only in the visible portion of the electromagnetic spectrum. Consequently, the absolute visual magnitude ignores energy i ...
Star clusters and constellations
... as time passes the appearance of the constellation will change. This change will be very slow and differences are only seen over some hundreds of thousands or years. Examples of constellations are Orion, Ursa Major, Taurus, Perseus, Cassiopeia etc. ...
... as time passes the appearance of the constellation will change. This change will be very slow and differences are only seen over some hundreds of thousands or years. Examples of constellations are Orion, Ursa Major, Taurus, Perseus, Cassiopeia etc. ...
The Constellation Microscopium, the Microscope Microscopium is a
... brightest star. It is a yellow giant of spectral type G6III. Lying 381 light years away, It depicts the eyepiece of the microscope. Alpha Microscopii is also a yellow giant, though in this case a variable Johann Bode in his Uranographia atlas of star, which ranges between apparent magnitudes 4.88 an ...
... brightest star. It is a yellow giant of spectral type G6III. Lying 381 light years away, It depicts the eyepiece of the microscope. Alpha Microscopii is also a yellow giant, though in this case a variable Johann Bode in his Uranographia atlas of star, which ranges between apparent magnitudes 4.88 an ...
chap17_s05_probs
... 2.5, you are asked to find the distance to the star. ANSWER: Stars appear fainter if located further away, just like any luminous object. The magnitude of a star represents its brightness, either its perceived brightness, known as its apparent magnitude, or its actual, true, brightness, known as its ...
... 2.5, you are asked to find the distance to the star. ANSWER: Stars appear fainter if located further away, just like any luminous object. The magnitude of a star represents its brightness, either its perceived brightness, known as its apparent magnitude, or its actual, true, brightness, known as its ...
Document
... You know that Tan(Ø ) = d/D Today we have accurate parallaxes for about 10,000 stars. ...
... You know that Tan(Ø ) = d/D Today we have accurate parallaxes for about 10,000 stars. ...
The Life of a Star
... • ….are in the second and longest stage. • As long as they have hydrogen atoms to fuse into helium atoms they just keep on releasing lots of energy. ...
... • ….are in the second and longest stage. • As long as they have hydrogen atoms to fuse into helium atoms they just keep on releasing lots of energy. ...
chap17_f04_probs
... 2.5, you are asked to find the distance to the star. ANSWER: Stars appear fainter if located further away, just like any luminous object. The magnitude of a star represents its brightness, either its perceived brightness, known as its apparent magnitude, or its actual, true, brightness, known as its ...
... 2.5, you are asked to find the distance to the star. ANSWER: Stars appear fainter if located further away, just like any luminous object. The magnitude of a star represents its brightness, either its perceived brightness, known as its apparent magnitude, or its actual, true, brightness, known as its ...
Ursa Minor
Ursa Minor (Latin: ""Smaller She-Bear"", contrasting with Ursa Major), also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, hence the name Little Dipper. It was one of the 48 constellations listed by the 2nd-century astronomer Ptolemy, and remains one of the 88 modern constellations. Ursa Minor has traditionally been important for navigation, particularly by mariners, due to Polaris being the North Star.Polaris, the brightest star in the constellation, is a yellow-white supergiant and the brightest Cepheid variable star in the night sky, ranging from apparent magnitude 1.97 to 2.00. Beta Ursae Minoris, also known as Kochab, is an aging star that has swollen and cooled to become an orange giant with an apparent magnitude of 2.08, only slightly fainter than Polaris. Kochab and magnitude 3 Gamma Ursae Minoris have been called the ""guardians of the pole star"". Planets have been detected orbiting four of the stars, including Kochab. The constellation also contains an isolated neutron star—Calvera—and H1504+65, the hottest white dwarf yet discovered with a surface temperature of 200,000 K.