PHYSICS 1500 - ASTRONOMY TOTAL: 100 marks Section A Please
... Why does the disk of our galaxy appear blue? (a) all the red starlight is scattered out of our view. (b) the blue light is recombination radiation from HII regions. (c) the blue light is emission from elements in the interstellar medium heavier than hydrogen. (d) it is illuminated by the Magellanic ...
... Why does the disk of our galaxy appear blue? (a) all the red starlight is scattered out of our view. (b) the blue light is recombination radiation from HII regions. (c) the blue light is emission from elements in the interstellar medium heavier than hydrogen. (d) it is illuminated by the Magellanic ...
Outside the Solar System Outside the Solar System OUTSIDE THE
... and its many amazing features. Someday—perhaps even in students’ lifetimes—we may get answers to some key questions, including how the universe began and whether life exists anywhere besides on Earth. ...
... and its many amazing features. Someday—perhaps even in students’ lifetimes—we may get answers to some key questions, including how the universe began and whether life exists anywhere besides on Earth. ...
Final Lecture Notes from 2002
... The essential features of all living systems are discussed as they relate to what we might expect in terms of life elsewhere in the ...
... The essential features of all living systems are discussed as they relate to what we might expect in terms of life elsewhere in the ...
The Origin of the Solar System: Progress in Understanding Accretion
... how common habitable planets might be. The minor planets also provide clues to the dynamical processes during and following accretion. Our own planetary system is no longer the only one known, and this has substantially changed our ideas about planetary formation. The asteroids and comets, while not ...
... how common habitable planets might be. The minor planets also provide clues to the dynamical processes during and following accretion. Our own planetary system is no longer the only one known, and this has substantially changed our ideas about planetary formation. The asteroids and comets, while not ...
STARS AND PLANETS: A NEW SET OF MIDDLE SCHOOL
... with interesting (as defined by the students) life forms, assuming the history of life on Earth is typical. Key concepts include: • How long a star shines is very dependent on its mass • Low mass stars have less hydrogen to convert to helium than do high mass stars, but live much longer • Our sun ha ...
... with interesting (as defined by the students) life forms, assuming the history of life on Earth is typical. Key concepts include: • How long a star shines is very dependent on its mass • Low mass stars have less hydrogen to convert to helium than do high mass stars, but live much longer • Our sun ha ...
Microlensing
... – Complete network with a single wide FOV 1-2m telescope in SA. – Frequency of planets >M beyond the snow line. – Test planet formation theories. ...
... – Complete network with a single wide FOV 1-2m telescope in SA. – Frequency of planets >M beyond the snow line. – Test planet formation theories. ...
Comets-Asteroids-and
... and carbon. • The first one discovered (and the biggest) is named Ceres; it was discovered in 1801. • Asteroids range in size from tiny pebbles to about 578 miles (930 kilometers) in diameter (Ceres). ...
... and carbon. • The first one discovered (and the biggest) is named Ceres; it was discovered in 1801. • Asteroids range in size from tiny pebbles to about 578 miles (930 kilometers) in diameter (Ceres). ...
The Transformation of Gas Giant Planets into Rocky Planets
... The Sun formed around the solid iron core remnant of this titanic explosion. The inner planets formed from the heavier elements residing in the inner regions of the supernova’s debris field whereas the gas giant planets formed from lighter elements propelled further out in the explosion.(3) Manuel’s ...
... The Sun formed around the solid iron core remnant of this titanic explosion. The inner planets formed from the heavier elements residing in the inner regions of the supernova’s debris field whereas the gas giant planets formed from lighter elements propelled further out in the explosion.(3) Manuel’s ...
Studying Space Section 2
... • Describe two lines of evidence for Earth’s rotation. • Explain how the change in apparent positions of constellations provides evidence of Earth’s rotation and revolution around the sun. • Summarize how Earth’s rotation and revolution provide a basis for measuring time. • Explain how the tilt of E ...
... • Describe two lines of evidence for Earth’s rotation. • Explain how the change in apparent positions of constellations provides evidence of Earth’s rotation and revolution around the sun. • Summarize how Earth’s rotation and revolution provide a basis for measuring time. • Explain how the tilt of E ...
here
... • The Solar System refers to the Sun and the surrounding planets, asteroids, comets, etc. • The scale of things: – It takes light about 11 hours to travel across the Solar system. This is 0.001265 years. – It takes light about 4.3 years to travel from the Sun to the nearest star. – It takes light ab ...
... • The Solar System refers to the Sun and the surrounding planets, asteroids, comets, etc. • The scale of things: – It takes light about 11 hours to travel across the Solar system. This is 0.001265 years. – It takes light about 4.3 years to travel from the Sun to the nearest star. – It takes light ab ...
KS3 Physics – The Solar System
... Explain why we experience day and night, and why we experience the four seasons. Explain why stars appear to be different sizes and brightness in the night sky. ...
... Explain why we experience day and night, and why we experience the four seasons. Explain why stars appear to be different sizes and brightness in the night sky. ...
Potential Meteorite Impact - Albert
... through the Earth's atmosphere are termed meteors, and these chunks that are hurtling through space are called meteoroids. Large pieces that do not vaporize completely and reach the surface of the Earth are termed meteorites. ...
... through the Earth's atmosphere are termed meteors, and these chunks that are hurtling through space are called meteoroids. Large pieces that do not vaporize completely and reach the surface of the Earth are termed meteorites. ...
Potential meteorite impact - Albert
... are heated to incandescence by the friction of the air. The bright trails that are coming through the Earth's atmosphere are termed meteors, and these chunks that are hurtling through space are called meteoroids. Large pieces that do not vaporize completely and reach the surface of the Earth are ter ...
... are heated to incandescence by the friction of the air. The bright trails that are coming through the Earth's atmosphere are termed meteors, and these chunks that are hurtling through space are called meteoroids. Large pieces that do not vaporize completely and reach the surface of the Earth are ter ...
Here
... Distances between objects in space are so great that specifying distance in miles is like giving the distance from here to St. Louis in millimeters. Scientists use light-years instead of miles to specify distances to stars and galaxies. A light-year is actually the distance light travels in one year ...
... Distances between objects in space are so great that specifying distance in miles is like giving the distance from here to St. Louis in millimeters. Scientists use light-years instead of miles to specify distances to stars and galaxies. A light-year is actually the distance light travels in one year ...
Document
... → (1) HZ very narrow and no CHZ (but 200 GYr not necessary) (2) HZ very close to the star → synchroneous rotation ...
... → (1) HZ very narrow and no CHZ (but 200 GYr not necessary) (2) HZ very close to the star → synchroneous rotation ...
Ch 20 Notes Stars
... The Big Bang • Scientists use telescopes to study the ancient light emitted by stars • Scientists have theorized that the universe formed during a cataclysmic event known as the big bang • The Big Bang Theory: States that the world began with a giant explosion 13 billion to 15 billion years ago (un ...
... The Big Bang • Scientists use telescopes to study the ancient light emitted by stars • Scientists have theorized that the universe formed during a cataclysmic event known as the big bang • The Big Bang Theory: States that the world began with a giant explosion 13 billion to 15 billion years ago (un ...
The Earth in space: An essay on the origin of the Solar system
... so many planetary systems. 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 G ...
... so many planetary systems. 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 G ...
Black holes
... How many asteroids are there? 26 very large asteroids have been discovered, which is probably most of the big ones; but, there are still millions of smaller ones that we have yet to see because they are too tiny, only a mile or so across. If we stuck all the asteroids together, how big would the new ...
... How many asteroids are there? 26 very large asteroids have been discovered, which is probably most of the big ones; but, there are still millions of smaller ones that we have yet to see because they are too tiny, only a mile or so across. If we stuck all the asteroids together, how big would the new ...
Primordial planets, comets and moons foster life in the cosmos
... Figure 2 illustrates schematically the two cosmologies in the gas epoch from 300 Kyr to 300 Myr (1013 -1016 s), which is often termed the dark ages for ΛCDMHC (top) because this is the time required for the first star and the first planets to appear in this cosmology. The temperature of space has fa ...
... Figure 2 illustrates schematically the two cosmologies in the gas epoch from 300 Kyr to 300 Myr (1013 -1016 s), which is often termed the dark ages for ΛCDMHC (top) because this is the time required for the first star and the first planets to appear in this cosmology. The temperature of space has fa ...
asteroid
... • More than a thousand asteroids have orbits that sometimes bring them very close to Earth. These are called near-Earth asteroids. • These asteroids could inflict great damage on Earth if they were to strike the planet. • Several recently established asteroid detection programs have begun to track a ...
... • More than a thousand asteroids have orbits that sometimes bring them very close to Earth. These are called near-Earth asteroids. • These asteroids could inflict great damage on Earth if they were to strike the planet. • Several recently established asteroid detection programs have begun to track a ...
How to Become a Planet Hunter-Careers in
... Stephen J. Edberg Exoplanet Exploration Directorate NASA Jet Propulsion Laboratory California Institute of Technology ...
... Stephen J. Edberg Exoplanet Exploration Directorate NASA Jet Propulsion Laboratory California Institute of Technology ...
Meteors and Comets
... During Columbus’ first voyage to the Indies he reported seeing “...a marvelous bolt of fire fall from the heavens into the sea...” This phenomenon was actually a meteor. Learn about meteors. Read the paragraph below and then answer the questions below it. Meteors are sometimes called “shooting st ...
... During Columbus’ first voyage to the Indies he reported seeing “...a marvelous bolt of fire fall from the heavens into the sea...” This phenomenon was actually a meteor. Learn about meteors. Read the paragraph below and then answer the questions below it. Meteors are sometimes called “shooting st ...
How the Oceans Formed
... to scientists, this molten, rocky mass, like everything else in the universe, formed from matter left over from the Big Bang. It may not have been a very hospitable place for its first few billion years, but this glowing ball of rock evolved into an oasis with great blue oceans filled with life. Of ...
... to scientists, this molten, rocky mass, like everything else in the universe, formed from matter left over from the Big Bang. It may not have been a very hospitable place for its first few billion years, but this glowing ball of rock evolved into an oasis with great blue oceans filled with life. Of ...
Panspermia
Panspermia (from Greek πᾶν (pan), meaning ""all"", and σπέρμα (sperma), meaning ""seed"") is the hypothesis that life exists throughout the Universe, distributed by meteoroids, asteroids, comets, planetoids and, also, by spacecraft in the form of unintended contamination by microorganisms.Panspermia is a hypothesis proposing that microscopic life forms that can survive the effects of space, such as extremophiles, become trapped in debris that is ejected into space after collisions between planets and small Solar System bodies that harbor life. Some organisms may travel dormant for an extended amount of time before colliding randomly with other planets or intermingling with protoplanetary disks. If met with ideal conditions on a new planet's surfaces, the organisms become active and the process of evolution begins. Panspermia is not meant to address how life began, just the method that may cause its distribution in the Universe.Pseudo-panspermia (sometimes called ""soft panspermia"" or ""molecular panspermia"") argues that the pre-biotic organic building blocks of life originated in space and were incorporated in the solar nebula from which the planets condensed and were further —and continuously— distributed to planetary surfaces where life then emerged (abiogenesis). From the early 1970s it was becoming evident that interstellar dust consisted of a large component of organic molecules. Interstellar molecules are formed by chemical reactions within very sparse interstellar or circumstellar clouds of dust and gas. The dust plays a critical role of shielding the molecules from the ionizing effect of ultraviolet radiation emitted by stars.Several simulations in laboratories and in low Earth orbit suggest that ejection, entry and impact is survivable for some simple organisms.