The formation of stars and planets
... Thermal emission of Jupiter and Saturn • Jupiter and Saturn emit more radiation than they receive from the sun. • They are not massive enough for nuclear burning (need at least 13 Mjup) • Kelvin-Helmholz cooling time scale much shorter than current age (at least for Saturn) • Possible solution: – H ...
... Thermal emission of Jupiter and Saturn • Jupiter and Saturn emit more radiation than they receive from the sun. • They are not massive enough for nuclear burning (need at least 13 Mjup) • Kelvin-Helmholz cooling time scale much shorter than current age (at least for Saturn) • Possible solution: – H ...
pdf format
... – measured angular size of Moon & compared this to the estimate of the Moon’s size relative to Earth’s diameter – Assumed Moon’s orbit was circular & uniform – Measured angle between Sun-Earth-Moon at 1st quarter: estimated this to be 87 deg., so α=3 deg. – Then Earth-Moon distance is about = (3/360 ...
... – measured angular size of Moon & compared this to the estimate of the Moon’s size relative to Earth’s diameter – Assumed Moon’s orbit was circular & uniform – Measured angle between Sun-Earth-Moon at 1st quarter: estimated this to be 87 deg., so α=3 deg. – Then Earth-Moon distance is about = (3/360 ...
For Chapter 16
... beyond Earth’s atmosphere • Universe – everything, all energy, matter, and space • The Milky Way– one of 50 billion galaxies scattered throughout the universe • Solar System – contains our Sun and 9 planets • Sun – supplies the energy for nearly all life on the planet earth ...
... beyond Earth’s atmosphere • Universe – everything, all energy, matter, and space • The Milky Way– one of 50 billion galaxies scattered throughout the universe • Solar System – contains our Sun and 9 planets • Sun – supplies the energy for nearly all life on the planet earth ...
PowerPoint Presentation - AY 4: The Stars
... • Learn some astronomy. The details are not so important, the fact that we have been able to learn so much about the Universe is a more important point. ...
... • Learn some astronomy. The details are not so important, the fact that we have been able to learn so much about the Universe is a more important point. ...
α Centauri: a double star - University of Canterbury
... Wiegert & Holman found stable orbits inside 2.34 AU, but unstable 3 to 70 AU from each star, provided i = 0° (coplanar with binary orbit). ...
... Wiegert & Holman found stable orbits inside 2.34 AU, but unstable 3 to 70 AU from each star, provided i = 0° (coplanar with binary orbit). ...
Orbit by Tega Jessa Everything in the universe circles or “orbits
... body, like a planet, star, or moon. In turn, this relies on a mathematical description, or summary, of the body’s orbit, assuming Newtonian gravity (or something very close to it). Such orbits are approximately elliptical in shape, and a key parameter describing the ellipse is its eccentricity. In s ...
... body, like a planet, star, or moon. In turn, this relies on a mathematical description, or summary, of the body’s orbit, assuming Newtonian gravity (or something very close to it). Such orbits are approximately elliptical in shape, and a key parameter describing the ellipse is its eccentricity. In s ...
Day-6
... The Milky Way probably formed by the merger of many smaller protogalaxies. Several of these are still orbiting the Milky Way as satellite galaxies. These can contain significant amounts of gas. The gas delivered by the protogalaxies was a significant source of star formation. Evidence for ...
... The Milky Way probably formed by the merger of many smaller protogalaxies. Several of these are still orbiting the Milky Way as satellite galaxies. These can contain significant amounts of gas. The gas delivered by the protogalaxies was a significant source of star formation. Evidence for ...
A search for planets around intermediate Mass Stars with the Hobby
... it is much more efficient to utilize the power of the radial velocity (RV) method by exploiting the many narrow spectral lines of GK-giants, the descendants of the main sequence A-F type stars, sufficient to achieve a < 10 ms−1 RV measurement precision. The GK-giant surveys provide constraints on th ...
... it is much more efficient to utilize the power of the radial velocity (RV) method by exploiting the many narrow spectral lines of GK-giants, the descendants of the main sequence A-F type stars, sufficient to achieve a < 10 ms−1 RV measurement precision. The GK-giant surveys provide constraints on th ...
Space Science Unit
... • This chart uses surface temperature of the star and the absolute magnitude (brightness) of the star to help astronomers decide which phase of the star’s life cycle the star is in and other important information about the star. • Most stars are what we consider main sequence (including our sun). Th ...
... • This chart uses surface temperature of the star and the absolute magnitude (brightness) of the star to help astronomers decide which phase of the star’s life cycle the star is in and other important information about the star. • Most stars are what we consider main sequence (including our sun). Th ...
What theories account for the origin of the solar system?
... Planets of our solar system can be divided into two very different kinds: ...
... Planets of our solar system can be divided into two very different kinds: ...
distance to the centre of the Milky Way.
... “Universe” = everything: the entire ensemble of stars, planets, galaxies, gas, dust, radiation, dark matter, empty space, as far as we can see ...
... “Universe” = everything: the entire ensemble of stars, planets, galaxies, gas, dust, radiation, dark matter, empty space, as far as we can see ...
Habitable worlds with JWST: transit spectroscopy of the TRAPPIST
... has provided not one, but three, potential targets for JWST follow up. TRAPPIST-1 is an ultracool dwarf of spectral type M8, only 12 parsecs away and hosting three planets with R < 1.2R⊕ . The innermost two planets b and c have 4× and 2× the irradiation experienced by Earth; the orbital period of th ...
... has provided not one, but three, potential targets for JWST follow up. TRAPPIST-1 is an ultracool dwarf of spectral type M8, only 12 parsecs away and hosting three planets with R < 1.2R⊕ . The innermost two planets b and c have 4× and 2× the irradiation experienced by Earth; the orbital period of th ...
The Earth in Context: Universe and Solar System
... Increasing Order of Scale: Interstellar dust ---meteroids/asteroids/comets----moons-----planets----solar system----galaxy----galaxy clusters-----galaxy superclusters ...
... Increasing Order of Scale: Interstellar dust ---meteroids/asteroids/comets----moons-----planets----solar system----galaxy----galaxy clusters-----galaxy superclusters ...
A new Cosmos – a novel Physics
... was first presented by Isaac Newton one and a half centuries after Copernicus’ proposition. A third critique of Copernican theory was a quite sophisticated argument which included precise astronomical measurements already available in the mid 16th century: If the earth rotates around the sun, which ...
... was first presented by Isaac Newton one and a half centuries after Copernicus’ proposition. A third critique of Copernican theory was a quite sophisticated argument which included precise astronomical measurements already available in the mid 16th century: If the earth rotates around the sun, which ...
FCAT 2.0 Practice/Sample Questions
... A diagram of the carbon cycle is shown below Each arrow represents a process in the cycle. Which of the following best describes the process that occurs at arrow X? A. Bacteria (soil microbes) break ...
... A diagram of the carbon cycle is shown below Each arrow represents a process in the cycle. Which of the following best describes the process that occurs at arrow X? A. Bacteria (soil microbes) break ...
Rare Earth hypothesis
In planetary astronomy and astrobiology, the Rare Earth Hypothesis argues that the origin of life and the evolution of biological complexity such as sexually reproducing, multicellular organisms on Earth (and, subsequently, human intelligence) required an improbable combination of astrophysical and geological events and circumstances. The hypothesis argues that complex extraterrestrial life is a very improbable phenomenon and likely to be extremely rare. The term ""Rare Earth"" originates from Rare Earth: Why Complex Life Is Uncommon in the Universe (2000), a book by Peter Ward, a geologist and paleontologist, and Donald E. Brownlee, an astronomer and astrobiologist, both faculty members at the University of Washington.An alternative view point was argued by Carl Sagan and Frank Drake, among others. It holds that Earth is a typical rocky planet in a typical planetary system, located in a non-exceptional region of a common barred-spiral galaxy. Given the principle of mediocrity (also called the Copernican principle), it is probable that the universe teems with complex life. Ward and Brownlee argue to the contrary: that planets, planetary systems, and galactic regions that are as friendly to complex life as are the Earth, the Solar System, and our region of the Milky Way are very rare.