1 HABITABLE ZONES IN THE UNIVERSE GUILLERMO GONZALEZ
... Since its introduction over four decades ago, the Circumstellar Habitable Zone (CHZ) concept has served to focus scientific discussions about habitability within planetary systems. Early studies simply defined the CHZ as that range of distances from the Sun that an Earth-like planet can maintain liq ...
... Since its introduction over four decades ago, the Circumstellar Habitable Zone (CHZ) concept has served to focus scientific discussions about habitability within planetary systems. Early studies simply defined the CHZ as that range of distances from the Sun that an Earth-like planet can maintain liq ...
Planets, Moons, and Stars
... Why does the Moon’s shape seem to change? The Moon may seem to change shape, but it is always a sphere. It only appears to change shape because you see different amounts of its lighted side. The Sun shines on and lights half of the Moon’s surface. The other half faces away from the Sun. It is in da ...
... Why does the Moon’s shape seem to change? The Moon may seem to change shape, but it is always a sphere. It only appears to change shape because you see different amounts of its lighted side. The Sun shines on and lights half of the Moon’s surface. The other half faces away from the Sun. It is in da ...
Latitudes and Longitudes
... Copernicus dedicated himself to the study of medicine, law and astronomy. He was the first to present clear evidence that the Earth revolved around the Sun. He compiled his ideas in the book On the Rotation of Celestial Bodies, published in 1543 in Nuremburg, Germany. This was the year in which D. J ...
... Copernicus dedicated himself to the study of medicine, law and astronomy. He was the first to present clear evidence that the Earth revolved around the Sun. He compiled his ideas in the book On the Rotation of Celestial Bodies, published in 1543 in Nuremburg, Germany. This was the year in which D. J ...
Chapter 14 Neutron Stars and Black holes
... In addition, those with energy bursts are about 100 times as luminous as those without bursts. What type of compact objects are responsible for these two types of X-ray novae? a. Those with bursts contain black holes and those without bursts contain neutron stars. b. Those with bursts contain neutro ...
... In addition, those with energy bursts are about 100 times as luminous as those without bursts. What type of compact objects are responsible for these two types of X-ray novae? a. Those with bursts contain black holes and those without bursts contain neutron stars. b. Those with bursts contain neutro ...
Document
... 1. The approximate U238/Th234 ratios after 1, 2, 3 and 4 billion years are 6/7, ¾, 5/8 and 27/50. In percentages of U238 remaining after the stated time periods, this would be 86%, 73%, 63% and 54%. Unit 34 1. The orbital period of these planets would be about 0.03 years or about 11 days; 1 year (sa ...
... 1. The approximate U238/Th234 ratios after 1, 2, 3 and 4 billion years are 6/7, ¾, 5/8 and 27/50. In percentages of U238 remaining after the stated time periods, this would be 86%, 73%, 63% and 54%. Unit 34 1. The orbital period of these planets would be about 0.03 years or about 11 days; 1 year (sa ...
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... What happens in a low-mass star when core temperature rises enough for helium fusion to begin? A. Helium fusion slowly starts up. B. Hydrogen fusion stops. C. Helium fusion rises very sharply. (Hint: Degeneracy pressure is the main form of pressure in the inert helium core.) ...
... What happens in a low-mass star when core temperature rises enough for helium fusion to begin? A. Helium fusion slowly starts up. B. Hydrogen fusion stops. C. Helium fusion rises very sharply. (Hint: Degeneracy pressure is the main form of pressure in the inert helium core.) ...
Chapter 2: The Solar System and Beyond
... one month to go through its phases. During that time, called a lunar cycle, you see different portions of the daylight side of the Moon. The lunar cycle begins with new moon. During new moon, the Moon is between Earth and the Sun. Half of the Moon is lit by the Sun, but this half can’t be seen from ...
... one month to go through its phases. During that time, called a lunar cycle, you see different portions of the daylight side of the Moon. The lunar cycle begins with new moon. During new moon, the Moon is between Earth and the Sun. Half of the Moon is lit by the Sun, but this half can’t be seen from ...
Estimating Eccentricity of Planetary and Stellar Cores
... Magnetic field and pole reversals. The origin of Earth’s magnetic field remains one of the most important unexplained mysteries in planetary science. There is also no plausible explanation for magnetic pole reversals that are so well recorded in the magnetized mineral deposits around the globe [6]. ...
... Magnetic field and pole reversals. The origin of Earth’s magnetic field remains one of the most important unexplained mysteries in planetary science. There is also no plausible explanation for magnetic pole reversals that are so well recorded in the magnetized mineral deposits around the globe [6]. ...
PHYS3380_111615_bw - The University of Texas at Dallas
... - continued to brighten for the first 100 days after the initial flash, reaching a maximum brightness of about 3rd magnitude, bright enough to see with the naked eye. - then faded rapidly, with the brightness dropping by a factor of 2 every 77 days for the first 500 days - almost exactly the same ra ...
... - continued to brighten for the first 100 days after the initial flash, reaching a maximum brightness of about 3rd magnitude, bright enough to see with the naked eye. - then faded rapidly, with the brightness dropping by a factor of 2 every 77 days for the first 500 days - almost exactly the same ra ...
On Sunspot and Starspot Lifetimes - Patrick M. Hartigan
... in the present work. Many sunspots persist for less than one day, and lifetimes of more than a week or two are relatively uncertain since the spots disappear over the limb and observations are interrupted. The data used to calculate W are probably biased toward smaller values of T than are obtained ...
... in the present work. Many sunspots persist for less than one day, and lifetimes of more than a week or two are relatively uncertain since the spots disappear over the limb and observations are interrupted. The data used to calculate W are probably biased toward smaller values of T than are obtained ...
NAME: CLASS: 1 Solar System Formation: PowerPoint Notes Sheet
... Why are the inner planets made up of metallic elements and the outer planets are gaseous? Inner planets are hotter and closer to the Sun (origin) and outer planets are cooler and farther away Slide 15: Why might Jupiter and Saturn be made up of H and He and the other gas giants are made up of additi ...
... Why are the inner planets made up of metallic elements and the outer planets are gaseous? Inner planets are hotter and closer to the Sun (origin) and outer planets are cooler and farther away Slide 15: Why might Jupiter and Saturn be made up of H and He and the other gas giants are made up of additi ...
19. Our Galaxy 19.1 The Milky Way Revealed Our goals for learning
... • What is the significance of a rotation curve that is flat at large distances from the galactic center? • The Milky Way’s flat rotation curve implies that the matter associated with our galaxy extends to large distances from the center. A rotation curve is a plot of the orbital speed of stars or ga ...
... • What is the significance of a rotation curve that is flat at large distances from the galactic center? • The Milky Way’s flat rotation curve implies that the matter associated with our galaxy extends to large distances from the center. A rotation curve is a plot of the orbital speed of stars or ga ...
9/28/16 Wednesday Parallax Lab
... The parallax of the pencil depends on the distance the pencil is from you -- the closer the object, the larger the parallax. Thus, although it may have been hard to tell precisely, when the pencil was half the original distance from you, it had twice the parallax; when it was double the original dis ...
... The parallax of the pencil depends on the distance the pencil is from you -- the closer the object, the larger the parallax. Thus, although it may have been hard to tell precisely, when the pencil was half the original distance from you, it had twice the parallax; when it was double the original dis ...
M13/4/PHYSI/SP3/ENG/TZ1/XX Tuesday 7 May
... • Answer all of the questions from two of the Options. • Write your answers in the boxes provided. • A calculator is required for this paper. • A clean copy of the Physics Data Booklet is required for this paper. • The maximum mark for this examination paper is [40 marks]. ...
... • Answer all of the questions from two of the Options. • Write your answers in the boxes provided. • A calculator is required for this paper. • A clean copy of the Physics Data Booklet is required for this paper. • The maximum mark for this examination paper is [40 marks]. ...
FREE Sample Here
... B) within the disk. C) in the stars in the spiral arms. D) in the gas and dust. E) in the central bulge of the galaxy. Answer: A 27) The distribution of the mass of the Milky Way Galaxy is determined by A) counting the number of stars. B) determining the amount of gas and dust. C) studying how stars ...
... B) within the disk. C) in the stars in the spiral arms. D) in the gas and dust. E) in the central bulge of the galaxy. Answer: A 27) The distribution of the mass of the Milky Way Galaxy is determined by A) counting the number of stars. B) determining the amount of gas and dust. C) studying how stars ...
Observations of binary systems with pulsating components
... Binary systems: SB1 and SB2 • Spectroscopic binaries: stars which exhibit periodic displacement of their spectral lines owing to Doppler effect caused by orbital motion. • Depending on components’ relative brightness, the observed spectrum will show the displacement of lines of one or both componen ...
... Binary systems: SB1 and SB2 • Spectroscopic binaries: stars which exhibit periodic displacement of their spectral lines owing to Doppler effect caused by orbital motion. • Depending on components’ relative brightness, the observed spectrum will show the displacement of lines of one or both componen ...
Chapter 20. Galaxies
... reflects variations in the accretion rate. The time scale for the variations can be as short as minutes, hours, days or months. When variable galaxies on these time scales were first discovered it was hard for people to believe, since no object bigger than a few light minutes could vary on time scal ...
... reflects variations in the accretion rate. The time scale for the variations can be as short as minutes, hours, days or months. When variable galaxies on these time scales were first discovered it was hard for people to believe, since no object bigger than a few light minutes could vary on time scal ...
Using Star Charts
... The celestial sphere is seen from the inside out, not the outside in, so maps appear to be `turned around' compared to maps of Earth. i.e. for the Mercator projection they show east, rather than west, on the left side. ...
... The celestial sphere is seen from the inside out, not the outside in, so maps appear to be `turned around' compared to maps of Earth. i.e. for the Mercator projection they show east, rather than west, on the left side. ...
Lyman-α: The Many Applications and Challenges of This Powerful
... side of the interstellar H absorption, and the astrospheric hydrogen wall produces absorption on the short wavelength side. Depending on which absorption feature is stronger, the separation of the interstellar D and H absorption-line centers can be either larger or smaller than the atomic physics va ...
... side of the interstellar H absorption, and the astrospheric hydrogen wall produces absorption on the short wavelength side. Depending on which absorption feature is stronger, the separation of the interstellar D and H absorption-line centers can be either larger or smaller than the atomic physics va ...
Downloadable Full Text
... smaller, chemically simpler, and more ancient ultra-faint dwarf galaxies assembled shortly after the formation of the first stars and are ideal systems to study nucleosynthesis processes such as the r-process10,11. Reticulum II is a recently discovered ultra-faint dwarf galaxy12-14. Like other such ...
... smaller, chemically simpler, and more ancient ultra-faint dwarf galaxies assembled shortly after the formation of the first stars and are ideal systems to study nucleosynthesis processes such as the r-process10,11. Reticulum II is a recently discovered ultra-faint dwarf galaxy12-14. Like other such ...
Aquarius (constellation)
Aquarius is a constellation of the zodiac, situated between Capricornus and Pisces. Its name is Latin for ""water-carrier"" or ""cup-carrier"", and its symbol is 20px (Unicode ♒), a representation of water.Aquarius is one of the oldest of the recognized constellations along the zodiac (the sun's apparent path). It was one of the 48 constellations listed by the 2nd century AD astronomer Ptolemy, and it remains one of the 88 modern constellations. It is found in a region often called the Sea due to its profusion of constellations with watery associations such as Cetus the whale, Pisces the fish, and Eridanus the river.