Patterns in the Sky - Plano Independent School District
... the Little Dipper. The 2 stars that are the pointers are Dubhe—the top star and Merak—the bottom star in the pan. The handle has a star in the middle which is actually an optical double star. Their names are Alcor and Mizar. You must use a telescope to ...
... the Little Dipper. The 2 stars that are the pointers are Dubhe—the top star and Merak—the bottom star in the pan. The handle has a star in the middle which is actually an optical double star. Their names are Alcor and Mizar. You must use a telescope to ...
Weekly Homework Questions #3, Sep. 14, 2010
... 1. How can one measure the mass of a star other than the Sun? (a) measuring the color of the star and using a color-mass relationship (b) the apparent magnitude of a star tells its mass (c) the gravitational force on a companion star in a double star (d) the mass of a star is determined by its locat ...
... 1. How can one measure the mass of a star other than the Sun? (a) measuring the color of the star and using a color-mass relationship (b) the apparent magnitude of a star tells its mass (c) the gravitational force on a companion star in a double star (d) the mass of a star is determined by its locat ...
Constellations
... Patterns in the Sky • Stars which are “close” to each other (in angle) form patterns called constellations. – Not really close together ...
... Patterns in the Sky • Stars which are “close” to each other (in angle) form patterns called constellations. – Not really close together ...
STARS and GALAXIES
... • Absolute Luminosity (brightness)Measures how bright a star is in relation to the sun, if all the stars were the same distance from the Earth. ...
... • Absolute Luminosity (brightness)Measures how bright a star is in relation to the sun, if all the stars were the same distance from the Earth. ...
When Stars Blow Up
... •When the temperature reaches a few MK, fusion begins •Degenerate fusion is a runaway. •All the H fuses to He and heavier elements in a soundcrossing time (a few minutes) •The star increases in brightness ~ 10,000 times •Most of the matter is ejected ...
... •When the temperature reaches a few MK, fusion begins •Degenerate fusion is a runaway. •All the H fuses to He and heavier elements in a soundcrossing time (a few minutes) •The star increases in brightness ~ 10,000 times •Most of the matter is ejected ...
The Planet with Three Suns
... star.) The strange new world was discovered orbiting a star in a triple star system. That means its parent star orbits alongside two other stars. This makes sunrises and sunsets something special — sometimes one sun rises in the sky, sometimes it’s two or three! But despite this, this planet is not ...
... star.) The strange new world was discovered orbiting a star in a triple star system. That means its parent star orbits alongside two other stars. This makes sunrises and sunsets something special — sometimes one sun rises in the sky, sometimes it’s two or three! But despite this, this planet is not ...
Exploration of the Universe
... model? Who first proposed the heliocentric model? Who discovered that planets orbit the Sun in ellipses? 6. Describe two features of the Sun. 7. Define asteroids, comets, meteors and meteorites. 8. Name three types of electromagnetic radiation. 9. What two factors affect the brightness of a star? 10 ...
... model? Who first proposed the heliocentric model? Who discovered that planets orbit the Sun in ellipses? 6. Describe two features of the Sun. 7. Define asteroids, comets, meteors and meteorites. 8. Name three types of electromagnetic radiation. 9. What two factors affect the brightness of a star? 10 ...
Life Cycle of Star Flipbook
... 1. In the life cycle of a star, which mass(es) begin as a Nebula? 2. Which mass(es) end as a black hole? 3. The fuel for all stars is what gas? 4. What happens that similates the birth of a star? 5. Explain what happens in nuclear fusion? 6. What is going to happen to our Sun’s magnitude and tempera ...
... 1. In the life cycle of a star, which mass(es) begin as a Nebula? 2. Which mass(es) end as a black hole? 3. The fuel for all stars is what gas? 4. What happens that similates the birth of a star? 5. Explain what happens in nuclear fusion? 6. What is going to happen to our Sun’s magnitude and tempera ...
Star Name __Direction ___ Degrees
... 21. Name three stars that are second magnitude or brighter. Give their location in direction and degrees above the horizon on the celestial sphere. Star Name __Direction Example: Polaris North ___________ ____________ ...
... 21. Name three stars that are second magnitude or brighter. Give their location in direction and degrees above the horizon on the celestial sphere. Star Name __Direction Example: Polaris North ___________ ____________ ...
ASTR2050 Spring 2005 • In this class we will ...
... MBol (!) − MBol (!) = 2.5 log10 [L(!)/L(!)] ...
... MBol (!) − MBol (!) = 2.5 log10 [L(!)/L(!)] ...
AST 443
... 5. The Sun will reside on the main sequence for 1010 years. If the luminosity of a main-sequence star is proportional to the fourth power of the star’s mass, what mass star is just now leaving the main sequence in a cluster that formed (a) ...
... 5. The Sun will reside on the main sequence for 1010 years. If the luminosity of a main-sequence star is proportional to the fourth power of the star’s mass, what mass star is just now leaving the main sequence in a cluster that formed (a) ...
Astronomical Ideas – Math Review practice problems 1. The radius
... 1. The radius of the Sun is 100 times the Earth’s radius. What is the volume of the Sun, relative to the volume of the Earth? 2. How many days does it take to travel 9.46 * 1012 km at a speed of 3 * 108 m/sec? 3. If you replaced the Earth with a planet of the same mass but three times larger in radi ...
... 1. The radius of the Sun is 100 times the Earth’s radius. What is the volume of the Sun, relative to the volume of the Earth? 2. How many days does it take to travel 9.46 * 1012 km at a speed of 3 * 108 m/sec? 3. If you replaced the Earth with a planet of the same mass but three times larger in radi ...
Slide 1
... • Binary Stars: when two stars orbit around each other • Stars of equal mass have their center of mass in the middle ...
... • Binary Stars: when two stars orbit around each other • Stars of equal mass have their center of mass in the middle ...
Astronomy Lecture Notes: Stellar Nomenclature I Introduction
... 1. If one star is 1 magnitude brighter than another then that star is actually about 2.5 times brighter as measured in Watts/m2 by a photometer. 2. If one star is 5 magnitudes brighter than another then that star is actually exactly 100 times brighter as measured in Watts/m2 by a photometer. 3. Exam ...
... 1. If one star is 1 magnitude brighter than another then that star is actually about 2.5 times brighter as measured in Watts/m2 by a photometer. 2. If one star is 5 magnitudes brighter than another then that star is actually exactly 100 times brighter as measured in Watts/m2 by a photometer. 3. Exam ...
Chapter 25 Study guide Answer Key
... 3) Which property of a star can be determined by its color? Temperature 4) About how many stars are estimated to occur in pairs or multiples? 50% ...
... 3) Which property of a star can be determined by its color? Temperature 4) About how many stars are estimated to occur in pairs or multiples? 50% ...
Shapes in the Sky
... Post-visit Discussion & Activities: 1. Make up your own constellations from existing star patterns. From there students can create their own myths and stories. 2. Find Polaris in the night sky and measure its altitude. This may be accomplished by either using your fist (a fist held at arm's length i ...
... Post-visit Discussion & Activities: 1. Make up your own constellations from existing star patterns. From there students can create their own myths and stories. 2. Find Polaris in the night sky and measure its altitude. This may be accomplished by either using your fist (a fist held at arm's length i ...
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.