Research Information for Space Bodies Project
... 3. Days and years vary by asteroid. A day on asteroid Ida, for example, takes only 4.6 hours (the time it takes to rotate or spin once). Ida makes a complete orbit around the sun (a year in this asteroid's time) in 4.8 Earth years. 4. Asteroids are solid, rocky and irregular bodies. 5. Asteroids do ...
... 3. Days and years vary by asteroid. A day on asteroid Ida, for example, takes only 4.6 hours (the time it takes to rotate or spin once). Ida makes a complete orbit around the sun (a year in this asteroid's time) in 4.8 Earth years. 4. Asteroids are solid, rocky and irregular bodies. 5. Asteroids do ...
Conceptual Physics
... 3. In a random sample of stars in the Sun’s neighborhood, you would expect about 90% of them: a. To be red giants b. To be white dwarfs c. To be main sequence stars d. To have just been born e. To be older than the Sun 4. A star near the top of the main sequence has a mass about: a. Twice the Sun’s ...
... 3. In a random sample of stars in the Sun’s neighborhood, you would expect about 90% of them: a. To be red giants b. To be white dwarfs c. To be main sequence stars d. To have just been born e. To be older than the Sun 4. A star near the top of the main sequence has a mass about: a. Twice the Sun’s ...
The barycentric motion of exoplanet host stars
... motion of the star about the system barycentre can be approximated by the linear superposition of the reflex motions due to the Keplerian orbit of each individual planet around that star-planet barycentre. If the planets have periods or close approaches such that they are dynamically interacting, th ...
... motion of the star about the system barycentre can be approximated by the linear superposition of the reflex motions due to the Keplerian orbit of each individual planet around that star-planet barycentre. If the planets have periods or close approaches such that they are dynamically interacting, th ...
Renaissance Astronomy
... of Roger Bacon (1267): “Greater things than these may be performed by refracted vision. For it is is easy to understand by the canons above mentioned that the greatest things may appear exceeding small, and the contrary. For we can give such figures to transparent bodies, and dispose them in such or ...
... of Roger Bacon (1267): “Greater things than these may be performed by refracted vision. For it is is easy to understand by the canons above mentioned that the greatest things may appear exceeding small, and the contrary. For we can give such figures to transparent bodies, and dispose them in such or ...
Earth`s Moon
... Asteroids are usually reddish or black in color. Asteroids are often called minor planets. The area near Jupiter where no asteroids are found is called the Kirkwood Gap. Asteroids are thought to be what caused the craters on many of the planets and the moons. An asteroid is a fragment of m ...
... Asteroids are usually reddish or black in color. Asteroids are often called minor planets. The area near Jupiter where no asteroids are found is called the Kirkwood Gap. Asteroids are thought to be what caused the craters on many of the planets and the moons. An asteroid is a fragment of m ...
Document
... A full-fledged planet is an object that orbits the sun and is large enough to have become round due to the force of its own gravity. In addition, a planet has to dominate the neighborhood around its orbit. Pluto has been demoted to be a “Dwarf planet” (2006) because it does not dominate its neig ...
... A full-fledged planet is an object that orbits the sun and is large enough to have become round due to the force of its own gravity. In addition, a planet has to dominate the neighborhood around its orbit. Pluto has been demoted to be a “Dwarf planet” (2006) because it does not dominate its neig ...
Stellar Evolution (Powerpoint) 17
... billions of years to burn, this star burns all at once. BIG explosion! ...
... billions of years to burn, this star burns all at once. BIG explosion! ...
Name
... the sunset position will shift from northwest (first day of summer) to west (first day of autumn) to southwest (first day of winter) and back to west (first day of spring). This constant shifting is caused by the fact that Earth’s axis is “tilted” by 23.5 degrees. As a result, the ecliptic does not ...
... the sunset position will shift from northwest (first day of summer) to west (first day of autumn) to southwest (first day of winter) and back to west (first day of spring). This constant shifting is caused by the fact that Earth’s axis is “tilted” by 23.5 degrees. As a result, the ecliptic does not ...
astronomy timeline
... Galileo uses telescope for astronomical observations. Galileo didn't invent the telescope but he was among the first to use a telescope to examine the heavens. He carried out important observations of the Sun, Moon, Planets, and Stars. p. 51 ...
... Galileo uses telescope for astronomical observations. Galileo didn't invent the telescope but he was among the first to use a telescope to examine the heavens. He carried out important observations of the Sun, Moon, Planets, and Stars. p. 51 ...
Name
... C) Gamma rays were released from the Sun at record lows in 1987 D) Sunspot activity virtually ceased between the years 1645 and 1715. E) The energy output from the Sun was at a minimum from the years 1843 through 1902 5) Stars like the Sun probably do not form iron cores during their evolution becau ...
... C) Gamma rays were released from the Sun at record lows in 1987 D) Sunspot activity virtually ceased between the years 1645 and 1715. E) The energy output from the Sun was at a minimum from the years 1843 through 1902 5) Stars like the Sun probably do not form iron cores during their evolution becau ...
Name - MIT
... C) Sunspot activity virtually ceased between the years 1645 and 1715. D) Gamma rays were released from the Sun at record lows in 1987 E) The energy output from the Sun was at a minimum from the years 1843 through 1902 27) Stars like the Sun probably do not form iron cores during their evolution beca ...
... C) Sunspot activity virtually ceased between the years 1645 and 1715. D) Gamma rays were released from the Sun at record lows in 1987 E) The energy output from the Sun was at a minimum from the years 1843 through 1902 27) Stars like the Sun probably do not form iron cores during their evolution beca ...
Name
... C) Gamma rays were released from the Sun at record lows in 1987 D) Sunspot activity virtually ceased between the years 1645 and 1715. E) The energy output from the Sun was at a minimum from the years 1843 through 1902 26) Stars like the Sun probably do not form iron cores during their evolution beca ...
... C) Gamma rays were released from the Sun at record lows in 1987 D) Sunspot activity virtually ceased between the years 1645 and 1715. E) The energy output from the Sun was at a minimum from the years 1843 through 1902 26) Stars like the Sun probably do not form iron cores during their evolution beca ...
Name - MIT
... C) Sunspot activity virtually ceased between the years 1645 and 1715. D) Gamma rays were released from the Sun at record lows in 1987 E) The energy output from the Sun was at a minimum from the years 1843 through 1902 27) Stars like the Sun probably do not form iron cores during their evolution beca ...
... C) Sunspot activity virtually ceased between the years 1645 and 1715. D) Gamma rays were released from the Sun at record lows in 1987 E) The energy output from the Sun was at a minimum from the years 1843 through 1902 27) Stars like the Sun probably do not form iron cores during their evolution beca ...
Life in the Universe - abersychanastronomy
... For more than 1 billion years, this oxygen reacted with surface rocks and little stayed in the atmosphere. Eventually, some 2 billion years ago, the oxygen began to accumulate, but would not be “breathable” until just a few hundred million years ago. ...
... For more than 1 billion years, this oxygen reacted with surface rocks and little stayed in the atmosphere. Eventually, some 2 billion years ago, the oxygen began to accumulate, but would not be “breathable” until just a few hundred million years ago. ...
Stellar Evolution and the HR Diagram – Study Guide
... e. Is Antares hotter than our sun? No, it’s a giant, class K or M (lower on diagram) 23. Stars that move off the main sequence first move to the _Giant_ region of the HR diagram. These stars are fusing __helium__ into ____carbon__ (name the elements). 24. What determines the eventual fate and life s ...
... e. Is Antares hotter than our sun? No, it’s a giant, class K or M (lower on diagram) 23. Stars that move off the main sequence first move to the _Giant_ region of the HR diagram. These stars are fusing __helium__ into ____carbon__ (name the elements). 24. What determines the eventual fate and life s ...
Astronomy Exam #2 for the 10
... and cool giant stars. The hot main sequence stars appear to be mostly B and A spectral type with an absolute magnitude between +2 and -5. This range in absolute magnitudes corresponds to a range in luminosity of between 16 and 10,000 solar luminosities. These stars will have a short main sequence li ...
... and cool giant stars. The hot main sequence stars appear to be mostly B and A spectral type with an absolute magnitude between +2 and -5. This range in absolute magnitudes corresponds to a range in luminosity of between 16 and 10,000 solar luminosities. These stars will have a short main sequence li ...
Alpha Centauri 3
... 4.40 light-years). The stars swings between 11.4 and 36.0 AUs away in a highly elliptical orbit (e= 0.52) that takes almost 80 (79.90) years to complete and are inclined at an angle of 79.23° from the perspective of an observer on Earth (see Pourbaix et al, 2002, or 2000 in the Sixth Catalog of Orbi ...
... 4.40 light-years). The stars swings between 11.4 and 36.0 AUs away in a highly elliptical orbit (e= 0.52) that takes almost 80 (79.90) years to complete and are inclined at an angle of 79.23° from the perspective of an observer on Earth (see Pourbaix et al, 2002, or 2000 in the Sixth Catalog of Orbi ...
Phobos
... gravitational field of a foreground star amplifies the light of a background star that momentarily aligns with it. The particular character of the light magnification can reveal clues to the nature of the foreground star and any associated planets. However, without identification and characterizatio ...
... gravitational field of a foreground star amplifies the light of a background star that momentarily aligns with it. The particular character of the light magnification can reveal clues to the nature of the foreground star and any associated planets. However, without identification and characterizatio ...
Name
... diagram represents a time-exposure photograph taken by aiming a camera at Polaris in the night sky and leaving the shutter open for a period of time to record star trails. The angular arcs (star trails) show the apparent motions of some stars. ...
... diagram represents a time-exposure photograph taken by aiming a camera at Polaris in the night sky and leaving the shutter open for a period of time to record star trails. The angular arcs (star trails) show the apparent motions of some stars. ...
Working with the Illinois Learning Standards: A Constructivist
... Stars evolve much as animals evolve. The source of energy of the stars is unknown. As stars shrink due to gravity, they change from red to blue. Red stars are hot; blue stars are cool. Stars are all roughly the same size. Stars change little over their life spans. Stars can only last thousands or mi ...
... Stars evolve much as animals evolve. The source of energy of the stars is unknown. As stars shrink due to gravity, they change from red to blue. Red stars are hot; blue stars are cool. Stars are all roughly the same size. Stars change little over their life spans. Stars can only last thousands or mi ...
Birth and Death of Stars
... Life cycle of Stars: Protostar • Hydrogen gas in the nebula is pulled inward by gravity and starts to spin. As the gas spins faster, it heats up and becomes a protostar. Eventually the temperature reaches 10,000,000 oC and nuclear fusion occurs in the cloud's core. The cloud begins to glow brightly ...
... Life cycle of Stars: Protostar • Hydrogen gas in the nebula is pulled inward by gravity and starts to spin. As the gas spins faster, it heats up and becomes a protostar. Eventually the temperature reaches 10,000,000 oC and nuclear fusion occurs in the cloud's core. The cloud begins to glow brightly ...
Lecture 3, PPT version
... of the North pole with respect to the sky. This “minor motion” is very slow (takes 26,000 years to complete), but is important to navigation by the stars! Right now, the North Star is “Polaris” (the tail star of the Little Dipper). Five thousand years ago the North Star was Thuban, and in 14,000 it ...
... of the North pole with respect to the sky. This “minor motion” is very slow (takes 26,000 years to complete), but is important to navigation by the stars! Right now, the North Star is “Polaris” (the tail star of the Little Dipper). Five thousand years ago the North Star was Thuban, and in 14,000 it ...
Chpt12a
... As soon as the hydrogen becomes substantially depleted the helium core begins to shrink under the increased pressure of the unbalanced gravity. The increased pressure and heat causes the hydrogen shell to burn even faster causing the star to get brighter as the helium core continues to shrink and he ...
... As soon as the hydrogen becomes substantially depleted the helium core begins to shrink under the increased pressure of the unbalanced gravity. The increased pressure and heat causes the hydrogen shell to burn even faster causing the star to get brighter as the helium core continues to shrink and he ...
The Earth in space: An essay on the origin of the Solar system
... The dualistic theory is historically probably the first one proposed by BufEon (1719). H e saw the origin of the planetary system as a result of a collision between the Sun and a comet that came from the depth of interstellar space. Following the poetic word — picture of Gamow, it was a " comete fat ...
... The dualistic theory is historically probably the first one proposed by BufEon (1719). H e saw the origin of the planetary system as a result of a collision between the Sun and a comet that came from the depth of interstellar space. Following the poetic word — picture of Gamow, it was a " comete fat ...
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.