Extra Credit
... Something disturbs the comet's orbit -- like the gravity of a passing star -- starting it on a long fall toward the Sun. As a comet approaches the Sun, some of its ice vaporizes, freeing particles of rock as well. This material forms a bright cloud around the comet. And some of the material is pushe ...
... Something disturbs the comet's orbit -- like the gravity of a passing star -- starting it on a long fall toward the Sun. As a comet approaches the Sun, some of its ice vaporizes, freeing particles of rock as well. This material forms a bright cloud around the comet. And some of the material is pushe ...
earth & space science
... Classifying Stars Main sequence is the location on the H-R diagram where most stars lie; it has a diagonal pattern from the lower right to the upper left. One way scientists classify stars is by plotting the surface temperatures of stars against their ...
... Classifying Stars Main sequence is the location on the H-R diagram where most stars lie; it has a diagonal pattern from the lower right to the upper left. One way scientists classify stars is by plotting the surface temperatures of stars against their ...
document
... massive black hole in the galaxies center of Andromeda. They discovered that it is 30 million times heavier than the Sun. The black hole does not show up on radios or in X-ray imaging. This contrasts with the active black holes in other galaxies, which are avidly consuming material and producing bri ...
... massive black hole in the galaxies center of Andromeda. They discovered that it is 30 million times heavier than the Sun. The black hole does not show up on radios or in X-ray imaging. This contrasts with the active black holes in other galaxies, which are avidly consuming material and producing bri ...
Chapter 28 Stars and Their Characteristics
... • Step 3 - Fusion stops, temperature drops • Step 4 - Core contracts (gravity pulling atoms in) • Step 5 - Increased temperature (more atoms, more collisions) and density in the core reinitiates nuclear fusion, equilibrium is achieved, and the cycle begins again ...
... • Step 3 - Fusion stops, temperature drops • Step 4 - Core contracts (gravity pulling atoms in) • Step 5 - Increased temperature (more atoms, more collisions) and density in the core reinitiates nuclear fusion, equilibrium is achieved, and the cycle begins again ...
Stars
... which gives them a very high temperature. These stars often run out of fuel in only 10,000 - 100,000 years. A blue giant is very bright. Like a light house, they shine across a great distance. Even though blue giant stars are rare, they make up many of the stars we see at night. Blue giant stars die ...
... which gives them a very high temperature. These stars often run out of fuel in only 10,000 - 100,000 years. A blue giant is very bright. Like a light house, they shine across a great distance. Even though blue giant stars are rare, they make up many of the stars we see at night. Blue giant stars die ...
STUDY GUIDE:
... Star clusters can be open (also called galactic) or globular. There are fewer and more sparse stars found in an open cluster than globular one. Stars in an open cluster are usually about the same age. One of the more famous visible open clusters is the Pleiades (also known as the Seven Sisters) in T ...
... Star clusters can be open (also called galactic) or globular. There are fewer and more sparse stars found in an open cluster than globular one. Stars in an open cluster are usually about the same age. One of the more famous visible open clusters is the Pleiades (also known as the Seven Sisters) in T ...
Find true north without a compass Which way is north?
... 2. Point the hour hand at the sun. You can use a stick to cast a shadow to aid in your alignment if you wish, but it is not necessary. 3. Bisect (find the centre point of) the angle between the hour hand and the twelve o'clock mark (the number 12 on the watch). The centre of the angle between the ho ...
... 2. Point the hour hand at the sun. You can use a stick to cast a shadow to aid in your alignment if you wish, but it is not necessary. 3. Bisect (find the centre point of) the angle between the hour hand and the twelve o'clock mark (the number 12 on the watch). The centre of the angle between the ho ...
Teachers Notes - Edinburgh International Science Festival
... the sun, and actually dates from as early as the 3rd century but was not widely supported until the 1600s. This is now known to be the accurate description of how our solar system works. ...
... the sun, and actually dates from as early as the 3rd century but was not widely supported until the 1600s. This is now known to be the accurate description of how our solar system works. ...
Introduction to the sky
... The brightest stars were called stars of the first magnitude. Fainter stars were classified as being of second, third, fourth, or fifth magnitude. Now stars can be measured to +/- 0.01 magnitude. We have also expanded the scale to include negative values, and much larger positive values. Sirius, fo ...
... The brightest stars were called stars of the first magnitude. Fainter stars were classified as being of second, third, fourth, or fifth magnitude. Now stars can be measured to +/- 0.01 magnitude. We have also expanded the scale to include negative values, and much larger positive values. Sirius, fo ...
Introduction to the sky
... The brightest stars were called stars of the first magnitude. Fainter stars were classified as being of second, third, fourth, or fifth magnitude. Now stars can be measured to +/- 0.01 magnitude. We have also expanded the scale to include negative values, and much larger positive values. Sirius, fo ...
... The brightest stars were called stars of the first magnitude. Fainter stars were classified as being of second, third, fourth, or fifth magnitude. Now stars can be measured to +/- 0.01 magnitude. We have also expanded the scale to include negative values, and much larger positive values. Sirius, fo ...
THE SUN: OUR STAR
... hydrogen in the core has been used up. This is where the Sun is in its lifetime right now. Point C is reached when there is no more hydrogen in the core and the fusion of hydrogen starts in the shell around the core. The radius of the Sun will swell to 40% larger than its present size and twice its ...
... hydrogen in the core has been used up. This is where the Sun is in its lifetime right now. Point C is reached when there is no more hydrogen in the core and the fusion of hydrogen starts in the shell around the core. The radius of the Sun will swell to 40% larger than its present size and twice its ...
The Dramatic Lives of Stars
... Given the position of young stars in the HR diagram, which of the following is true? A 0.5 solar mass star mostly: ...
... Given the position of young stars in the HR diagram, which of the following is true? A 0.5 solar mass star mostly: ...
Daynightseasonsstars-1
... condense, the pressure goes up, so heat also goes up If heats up enough(18,000,000°F), then nuclear fusion begins and VOILA.. a star is born!! ...
... condense, the pressure goes up, so heat also goes up If heats up enough(18,000,000°F), then nuclear fusion begins and VOILA.. a star is born!! ...
Unit 1 - UW Madison Astronomy Department
... What causes the core of a s tar to contract during the main sequence phase of the star’s life? a. Helium has a larger atomic weight than hydrogen and exerts a stronger gravitational pull on the core. b. Convection in the outer layers carries energy out of the core more efficiently as the star ages c ...
... What causes the core of a s tar to contract during the main sequence phase of the star’s life? a. Helium has a larger atomic weight than hydrogen and exerts a stronger gravitational pull on the core. b. Convection in the outer layers carries energy out of the core more efficiently as the star ages c ...
Star Formation, HR Diagram, and the Main Sequence (Professor
... Every M dwarf ever created is still on the main sequence!! ...
... Every M dwarf ever created is still on the main sequence!! ...
Answers to Coursebook questions – Chapter E5
... hydrogen of the star is used up in nuclear fusion reactions. The core of the star collapses and this releases gravitational potential energy that warms the core to sufficiently high temperatures for fusion of helium in the core to begin. The suddenly released energy forces the outer layers of the st ...
... hydrogen of the star is used up in nuclear fusion reactions. The core of the star collapses and this releases gravitational potential energy that warms the core to sufficiently high temperatures for fusion of helium in the core to begin. The suddenly released energy forces the outer layers of the st ...
![HR DIAGRAM[1] Star Human Comparison Are all stars the same](http://s1.studyres.com/store/data/010665051_1-e4f26b4aee29f3f3aaab891d368963d6-300x300.png)
HR DIAGRAM[1] Star Human Comparison Are all stars the same
... Star Human Comparison Are all stars the same? Not in the least! Some stars are just beginning to form in nebulae, others are enjoying middle age along the main sequence, and some have begun to die. The life cycle of a star can be compared to the life cycle of humans. Before you were born, your body ...
... Star Human Comparison Are all stars the same? Not in the least! Some stars are just beginning to form in nebulae, others are enjoying middle age along the main sequence, and some have begun to die. The life cycle of a star can be compared to the life cycle of humans. Before you were born, your body ...
Astronomy - Test 3
... destroy themselves E) Although such objects could occur, they would be so rare that we ignore them 26. Which of the following was not a method for making black holes that was discussed? A) Very high mass star supernova B) White dwarf supernova C) Accretion of matter onto a neutron star D) Merger of ...
... destroy themselves E) Although such objects could occur, they would be so rare that we ignore them 26. Which of the following was not a method for making black holes that was discussed? A) Very high mass star supernova B) White dwarf supernova C) Accretion of matter onto a neutron star D) Merger of ...
Events: - Temecula Valley Astronomers
... As the sun sets, I try to point out the first stars visible - usually the summer triangle. I talk about constellations and asterisms. Once the sky is dark, our first targets are man-made satellites. Many web sites and cell phone apps help you find what is visible. While we are waiting for them to co ...
... As the sun sets, I try to point out the first stars visible - usually the summer triangle. I talk about constellations and asterisms. Once the sky is dark, our first targets are man-made satellites. Many web sites and cell phone apps help you find what is visible. While we are waiting for them to co ...
Milky Way
... supernovae (hypernovae?) because spectra are seen. • Short gamma-ray bursts (< 2 sec): Found in young and old regions. Thought to be two merging neutron stars or a neutron star plus a black hole. ...
... supernovae (hypernovae?) because spectra are seen. • Short gamma-ray bursts (< 2 sec): Found in young and old regions. Thought to be two merging neutron stars or a neutron star plus a black hole. ...
Chapter 20 Stellar Evolution (20.1-20.3)
... • An envelope about the size of our solar system. The envelope is called a planetary nebula, even though it has nothing to do with planets—early astronomers viewing the fuzzy envelope thought it resembled a planetary system. Planetary nebulae can have many shapes: As the dead core of the star cools, ...
... • An envelope about the size of our solar system. The envelope is called a planetary nebula, even though it has nothing to do with planets—early astronomers viewing the fuzzy envelope thought it resembled a planetary system. Planetary nebulae can have many shapes: As the dead core of the star cools, ...
Star A
... Most stars are members of multiple-star systems—groups of two or more stars in orbit around one another. The majority are found in binary-star systems, which consist of two stars in orbit about their common center of mass, held together by their mutual gravitational attraction. (The Sun is not part ...
... Most stars are members of multiple-star systems—groups of two or more stars in orbit around one another. The majority are found in binary-star systems, which consist of two stars in orbit about their common center of mass, held together by their mutual gravitational attraction. (The Sun is not part ...
Perseus (constellation)
Perseus, named after the Greek mythological hero Perseus, is a constellation in the northern sky. It was one of 48 listed by the 2nd-century astronomer Ptolemy and among the 88 modern constellations defined by the International Astronomical Union (IAU). It is located in the northern celestial hemisphere near several other constellations named after legends surrounding Perseus, including Andromeda to the west and Cassiopeia to the north. Perseus is also bordered by Aries and Taurus to the south, Auriga to the east, Camelopardalis to the north, and Triangulum to the west.The galactic plane of the Milky Way passes through Perseus but is mostly obscured by molecular clouds. The constellation's brightest star is the yellow-white supergiant Alpha Persei (also called Mirfak), which shines at magnitude 1.79. It and many of the surrounding stars are members of an open cluster known as the Alpha Persei Cluster. The best-known star, however, is Algol (Beta Persei), linked with ominous legends because of its variability, which is noticeable to the naked eye. Rather than being an intrinsically variable star, it is an eclipsing binary. Other notable star systems in Perseus include X Persei, a binary system containing a neutron star, and GK Persei, a nova that peaked at magnitude 0.2 in 1901. The Double Cluster, comprising two open clusters quite near each other in the sky, was known to the ancient Chinese. The constellation gives its name to the Perseus Cluster (Abell 426), a massive galaxy cluster located 250 million light-years from Earth. It hosts the radiant of the annual Perseids meteor shower—one of the most prominent meteor showers in the sky.