Our Place in the Universe
... We should probably be able to tell how far away something is based upon a known geometry. 1,000 kilometers 1,000,000 kilometers 1,000,000,000 kilometers This would be inconvenient, so we will be using scientific notation in many cases. Just move the decimal point to the right (or left) to make the n ...
... We should probably be able to tell how far away something is based upon a known geometry. 1,000 kilometers 1,000,000 kilometers 1,000,000,000 kilometers This would be inconvenient, so we will be using scientific notation in many cases. Just move the decimal point to the right (or left) to make the n ...
test corrections
... 16. What measurement refers to a stars actual brightness? Explain how this is determined. 17. What is an H-R diagram? What information does it contain? 18. Explain how parallax is used to find the distance to nearby stars 19. How can 2 stars have the same absolute magnitude but different apparent ma ...
... 16. What measurement refers to a stars actual brightness? Explain how this is determined. 17. What is an H-R diagram? What information does it contain? 18. Explain how parallax is used to find the distance to nearby stars 19. How can 2 stars have the same absolute magnitude but different apparent ma ...
The Hidden Lives of Galaxies NSTA 2001
... •Their luminosity is high because they are very large, and so have a big surface area to radiate from. Typically they may have a radius one hundred times that of the Sun. ...
... •Their luminosity is high because they are very large, and so have a big surface area to radiate from. Typically they may have a radius one hundred times that of the Sun. ...
Stargazing Rules 01162013
... Moon is shaped like a "C", it bulges to the left. 18. Even though most of the objects we observe in the night sky appear not to move in relation to each other, in reality they are all moving at great speed relative to us and to each other. They appear not to be moving because of their great distanc ...
... Moon is shaped like a "C", it bulges to the left. 18. Even though most of the objects we observe in the night sky appear not to move in relation to each other, in reality they are all moving at great speed relative to us and to each other. They appear not to be moving because of their great distanc ...
Greek Astronomy - Galileo and Einstein
... Crystal Spheres: Plato, Eudoxus, Aristotle Plato, with his belief that the world was constructed with geometric simplicity and elegance, felt certain that the sun, moon and planets, being made of aither, would have a natural circular motion, since that is the simplest uniform motion that repeats its ...
... Crystal Spheres: Plato, Eudoxus, Aristotle Plato, with his belief that the world was constructed with geometric simplicity and elegance, felt certain that the sun, moon and planets, being made of aither, would have a natural circular motion, since that is the simplest uniform motion that repeats its ...
The script - University of Sheffield
... [When someone gets Uranus:] Yes, that’s Uranus. But did you know it was nearly called George? It was discovered by William Herschel back in 1783; he was a musician and amateur astronomer working at the English court, and he wanted to call it George. Why do you think that was? [They’ll guess that it ...
... [When someone gets Uranus:] Yes, that’s Uranus. But did you know it was nearly called George? It was discovered by William Herschel back in 1783; he was a musician and amateur astronomer working at the English court, and he wanted to call it George. Why do you think that was? [They’ll guess that it ...
1 The Solar System - e
... called asteroids, various celestial bodies such as dwarf planets and natural satellites revolving around the sun. When all these things are taken together; we consider them as a system. This is called the solar system. It is believed that the solar system has been formed 4600 million years ago, by c ...
... called asteroids, various celestial bodies such as dwarf planets and natural satellites revolving around the sun. When all these things are taken together; we consider them as a system. This is called the solar system. It is believed that the solar system has been formed 4600 million years ago, by c ...
Pocket Solar System Activity
... If you take a look, you’ve got the 4 gas giants and Pluto all on there. For the remaining bodies in the Solar System, you’ll only need 1/2 of the first 1/8th, that’s the inner 1/16th of your tape length! Fold the Sun out to meet Jupiter to mark the 1/16th spot. A planet does not go here, but the As ...
... If you take a look, you’ve got the 4 gas giants and Pluto all on there. For the remaining bodies in the Solar System, you’ll only need 1/2 of the first 1/8th, that’s the inner 1/16th of your tape length! Fold the Sun out to meet Jupiter to mark the 1/16th spot. A planet does not go here, but the As ...
Astronomy Daystarter Questions
... d. Hopelessness to ever move up the food chain, or have opposable ...
... d. Hopelessness to ever move up the food chain, or have opposable ...
Gravity`s Influence on the Development of the Solar System
... The inner region of the proplyd went through several temperature variations during the sun’s development. The early protosun, which was more luminous than it is today, produced temperatures of approximately 2,000 K in the inner region, which was greater than the condensation temperature of substance ...
... The inner region of the proplyd went through several temperature variations during the sun’s development. The early protosun, which was more luminous than it is today, produced temperatures of approximately 2,000 K in the inner region, which was greater than the condensation temperature of substance ...
1.1 Stars in the Broader Context of Modern Astro
... 600 million years after the Big Bang—when the Universe experienced its last ‘phase-change’: it changed from being mostly neutral to being mostly ionised (see Figure 1.1). This transition was caused by the ‘First Stars’ which are believed to have been very massive and highly luminous at wavelengths b ...
... 600 million years after the Big Bang—when the Universe experienced its last ‘phase-change’: it changed from being mostly neutral to being mostly ionised (see Figure 1.1). This transition was caused by the ‘First Stars’ which are believed to have been very massive and highly luminous at wavelengths b ...
Henry6SCI (H6SCIASTRO)
... 15. Daylight in the Northern Hemisphere lasts longer in summer than in winter, and the change in the length of day happens in a predictable pattern. Which statement correctly explains this condition of Earth's environment? A. The Sun moves closer to Earth in summer and farther away in winter. B. Ear ...
... 15. Daylight in the Northern Hemisphere lasts longer in summer than in winter, and the change in the length of day happens in a predictable pattern. Which statement correctly explains this condition of Earth's environment? A. The Sun moves closer to Earth in summer and farther away in winter. B. Ear ...
The Life Cycle of a star
... The Sun • The Sun is the only star in our solar system – All eight planets, comets, and an asteroid belt, revolve around the Sun. ...
... The Sun • The Sun is the only star in our solar system – All eight planets, comets, and an asteroid belt, revolve around the Sun. ...
HOMEWORK #1
... b. Observe the lightcurve of Algol (Persei - the “Demon Star”) Algol is the most famous eclipsing binary star system. The two stars orbit each other every 2 days 20 hours 49 minutes and periodically eclipse each other from the perspective of Earth. On the evenings of October 9 and 12, you can obse ...
... b. Observe the lightcurve of Algol (Persei - the “Demon Star”) Algol is the most famous eclipsing binary star system. The two stars orbit each other every 2 days 20 hours 49 minutes and periodically eclipse each other from the perspective of Earth. On the evenings of October 9 and 12, you can obse ...
HOMEWORK #1
... b. Observe the lightcurve of Algol (Persei - the “Demon Star”) Algol is the most famous eclipsing binary star system. The two stars orbit each other every 2 days 20 hours 49 minutes and periodically eclipse each other from the perspective of Earth. On the evenings of October 9 and 12, you can obse ...
... b. Observe the lightcurve of Algol (Persei - the “Demon Star”) Algol is the most famous eclipsing binary star system. The two stars orbit each other every 2 days 20 hours 49 minutes and periodically eclipse each other from the perspective of Earth. On the evenings of October 9 and 12, you can obse ...
The Solar System
... medium size star. It is believed to be over 4 billion years old. The Sun spins slowly on its axis as it moves around the galaxy. Because the Sun is so massive, it exerts a powerful gravitational pull on everything in our solar system. It is because of the Sun's gravitational pull that Earth and the ...
... medium size star. It is believed to be over 4 billion years old. The Sun spins slowly on its axis as it moves around the galaxy. Because the Sun is so massive, it exerts a powerful gravitational pull on everything in our solar system. It is because of the Sun's gravitational pull that Earth and the ...
Study Guide: Unit 1, The Universe and its Stars, HS
... 32) HS-ESS1-1 When a main-sequence star has exhausted the fuel in the inner region, it becomes a ________. A) black hole B) main-sequence star C) black dwarf D) red giant 33) HS-ESS1-2 A first magnitude star is ________ times brighter than a 5th magnitude star. A) 40 B) 100 C) 10 D) 5 34) HS-ESS1-2 ...
... 32) HS-ESS1-1 When a main-sequence star has exhausted the fuel in the inner region, it becomes a ________. A) black hole B) main-sequence star C) black dwarf D) red giant 33) HS-ESS1-2 A first magnitude star is ________ times brighter than a 5th magnitude star. A) 40 B) 100 C) 10 D) 5 34) HS-ESS1-2 ...
The Life Cycle of the Stars
... Like all stars, our Sun was formed from a cloud of hydrogen gas and dust that almost certainly included the ashes from an earlier star gone supernova. In its death throes, it created elements heavier than iron that our solar system inherited. Gravity pulled the cloud together into a giant ball. When ...
... Like all stars, our Sun was formed from a cloud of hydrogen gas and dust that almost certainly included the ashes from an earlier star gone supernova. In its death throes, it created elements heavier than iron that our solar system inherited. Gravity pulled the cloud together into a giant ball. When ...
notes
... placed it at the same distance that it currently is from our Sun (T = 5800 K) • We moved it to an M-type star (T = 3000 K) and placed it at the same distance that it currently is from our Sun • In each of these cases, where should we place the Earth to prevent these effects? ...
... placed it at the same distance that it currently is from our Sun (T = 5800 K) • We moved it to an M-type star (T = 3000 K) and placed it at the same distance that it currently is from our Sun • In each of these cases, where should we place the Earth to prevent these effects? ...
Review of "Man`s Place in Nature" by Alfred Russel Wallace
... they do in those of moderate size. This could not possibly happen if the stars were infinite in number or even if they extended in similar profusion into spaces much greater than those which our telescopes can reach, because in that case these dark backgrounds would be illuminated by the light of mi ...
... they do in those of moderate size. This could not possibly happen if the stars were infinite in number or even if they extended in similar profusion into spaces much greater than those which our telescopes can reach, because in that case these dark backgrounds would be illuminated by the light of mi ...
The Mass-Luminosity Relationship and Stellar Lifetimes
... solar masses. How long would a star like this live? (1 / 0.08)1.3 x 1010 = 26.7 x 1010 = 267 billion years • This means that the universe isn’t yet old enough for small red dwarf stars to have begun dying. Some red dwarfs may have been around since the universe began! ...
... solar masses. How long would a star like this live? (1 / 0.08)1.3 x 1010 = 26.7 x 1010 = 267 billion years • This means that the universe isn’t yet old enough for small red dwarf stars to have begun dying. Some red dwarfs may have been around since the universe began! ...
Planetary Properties
... Planets move around the Sun in closed paths, referred to as orbits. Certain properties of a planet’s orbit can affect the probability of whether or not life will develop. The properties of orbital motion have been well understood ever since Johannes Kepler (1571 - 1630) first proposed his three laws ...
... Planets move around the Sun in closed paths, referred to as orbits. Certain properties of a planet’s orbit can affect the probability of whether or not life will develop. The properties of orbital motion have been well understood ever since Johannes Kepler (1571 - 1630) first proposed his three laws ...
Planetary habitability
Planetary habitability is the measure of a planet's or a natural satellite's potential to develop and sustain life. Life may develop directly on a planet or satellite or be transferred to it from another body, a theoretical process known as panspermia. As the existence of life beyond Earth is unknown, planetary habitability is largely an extrapolation of conditions on Earth and the characteristics of the Sun and Solar System which appear favourable to life's flourishing—in particular those factors that have sustained complex, multicellular organisms and not just simpler, unicellular creatures. Research and theory in this regard is a component of planetary science and the emerging discipline of astrobiology.An absolute requirement for life is an energy source, and the notion of planetary habitability implies that many other geophysical, geochemical, and astrophysical criteria must be met before an astronomical body can support life. In its astrobiology roadmap, NASA has defined the principal habitability criteria as ""extended regions of liquid water, conditions favourable for the assembly of complex organic molecules, and energy sources to sustain metabolism.""In determining the habitability potential of a body, studies focus on its bulk composition, orbital properties, atmosphere, and potential chemical interactions. Stellar characteristics of importance include mass and luminosity, stable variability, and high metallicity. Rocky, terrestrial-type planets and moons with the potential for Earth-like chemistry are a primary focus of astrobiological research, although more speculative habitability theories occasionally examine alternative biochemistries and other types of astronomical bodies.The idea that planets beyond Earth might host life is an ancient one, though historically it was framed by philosophy as much as physical science. The late 20th century saw two breakthroughs in the field. The observation and robotic spacecraft exploration of other planets and moons within the Solar System has provided critical information on defining habitability criteria and allowed for substantial geophysical comparisons between the Earth and other bodies. The discovery of extrasolar planets, beginning in the early 1990s and accelerating thereafter, has provided further information for the study of possible extraterrestrial life. These findings confirm that the Sun is not unique among stars in hosting planets and expands the habitability research horizon beyond the Solar System.The chemistry of life may have begun shortly after the Big Bang, 13.8 billion years ago, during a habitable epoch when the Universe was only 10–17 million years old. According to the panspermia hypothesis, microscopic life—distributed by meteoroids, asteroids and other small Solar System bodies—may exist throughout the universe. Nonetheless, Earth is the only place in the universe known to harbor life. Estimates of habitable zones around other stars, along with the discovery of hundreds of extrasolar planets and new insights into the extreme habitats here on Earth, suggest that there may be many more habitable places in the universe than considered possible until very recently. On 4 November 2013, astronomers reported, based on Kepler space mission data, that there could be as many as 40 billion Earth-sized planets orbiting in the habitable zones of Sun-like stars and red dwarfs within the Milky Way. 11 billion of these estimated planets may be orbiting Sun-like stars. The nearest such planet may be 12 light-years away, according to the scientists.