Ch. 1 - Astro1010
... Daily cycle, noon to noon, is diurnal motion – solar day Stars aren’t in quite the same place 24 hours later, though, due to Earth’s revolution around Sun; when they are, one sidereal day has passed ...
... Daily cycle, noon to noon, is diurnal motion – solar day Stars aren’t in quite the same place 24 hours later, though, due to Earth’s revolution around Sun; when they are, one sidereal day has passed ...
Astronomical Observations (Fall 2004) Final Exam
... The telescope we have used during our trip to Lulin Observatory has a primary mirror diameter of 1 m and the Cassegrain optical system has a focal ratio of f/8. (a) The PI VersArray 1300B CCD camera used to take images has effectively 1300 times 1300 pixels with 20 micron pixels. Calculate the field ...
... The telescope we have used during our trip to Lulin Observatory has a primary mirror diameter of 1 m and the Cassegrain optical system has a focal ratio of f/8. (a) The PI VersArray 1300B CCD camera used to take images has effectively 1300 times 1300 pixels with 20 micron pixels. Calculate the field ...
Document
... means of the sky, but the motions of objects in the sky predicted the changing of the seasons, etc. ...
... means of the sky, but the motions of objects in the sky predicted the changing of the seasons, etc. ...
For stars
... Why do stars in the night sky appear considerably different in brightness? The distance to stars are not all the same. ...
... Why do stars in the night sky appear considerably different in brightness? The distance to stars are not all the same. ...
Time and Diurnal Motion
... • Eudoxus (360 BC) makes early map of constellations • Hipparchus (130 BC) made a star catalog of 850 stars with some sort of coordinates • Claudius Ptolemy (150 A.D.?): The first really accurate map, 48 constellations, 1025 stars with measured ecliptic longitude & latitude ...
... • Eudoxus (360 BC) makes early map of constellations • Hipparchus (130 BC) made a star catalog of 850 stars with some sort of coordinates • Claudius Ptolemy (150 A.D.?): The first really accurate map, 48 constellations, 1025 stars with measured ecliptic longitude & latitude ...
Standard candles
... For distances which are too large to measure using parallax, astronomers use 'standard candles'. Light sources which are further away appear fainter because the light is spread out over a greater area. If we know how luminous a source really is, then we can estimate its distance from how bright it a ...
... For distances which are too large to measure using parallax, astronomers use 'standard candles'. Light sources which are further away appear fainter because the light is spread out over a greater area. If we know how luminous a source really is, then we can estimate its distance from how bright it a ...
Comets, asteroids, and meteors oh my!
... – Seen once only 76 years – Last seen in 1986 – Next time we will see Halley’s comet will be around 2062 this is a prediction ...
... – Seen once only 76 years – Last seen in 1986 – Next time we will see Halley’s comet will be around 2062 this is a prediction ...
Infrared Instrumentation & Observing Techniques
... The small and large scale radio source are aligned to within about 10 deg. The radio sources are aligned to within a few degrees of perpendicular to the “inner" (1 kpc) dust disk but are poorly aligned with the perpendicular to the larger dust lane. The Bardeen-Petterson effect will cause the b ...
... The small and large scale radio source are aligned to within about 10 deg. The radio sources are aligned to within a few degrees of perpendicular to the “inner" (1 kpc) dust disk but are poorly aligned with the perpendicular to the larger dust lane. The Bardeen-Petterson effect will cause the b ...
Preview Sample 2
... The names of stars usually come from ancient Arabic, although modern astronomers often refer to a star by its constellation and a Greek letter assigned according to its brightness within the constellation. How can you compare the brightness of the stars? The magnitude system is the astronomer’s brig ...
... The names of stars usually come from ancient Arabic, although modern astronomers often refer to a star by its constellation and a Greek letter assigned according to its brightness within the constellation. How can you compare the brightness of the stars? The magnitude system is the astronomer’s brig ...
December
... Dust devils are tornadoes of dust. On a planet like Mars which is literally covered with dust, and where it never rains, dust devils are an important form of weather. Some Martian dust devils grow almost as tall as Mt. Everest, and researchers suspect they’re crackling with static electricity—a form ...
... Dust devils are tornadoes of dust. On a planet like Mars which is literally covered with dust, and where it never rains, dust devils are an important form of weather. Some Martian dust devils grow almost as tall as Mt. Everest, and researchers suspect they’re crackling with static electricity—a form ...
Witnesses to Local Cosmic History - Max-Planck
... water to Earth in this way. The question is also interesting because comets contain organic molecules. It is only recently that American researchers discovered the amino acid glycine in the dust of the comet Wild 2. Is it possible that the comets also brought seeds of life to our planet? This hypoth ...
... water to Earth in this way. The question is also interesting because comets contain organic molecules. It is only recently that American researchers discovered the amino acid glycine in the dust of the comet Wild 2. Is it possible that the comets also brought seeds of life to our planet? This hypoth ...
Stellar Evolution
... Fast wind from hot, inner layers of the star overtakes the slow wind and excites it => Planetary Nebula ...
... Fast wind from hot, inner layers of the star overtakes the slow wind and excites it => Planetary Nebula ...
Educator`s Guide for Dark Star Adventure
... Ask children what objects they see in the night sky and list them. Things to Do: 1. From either a classroom window or an outside play or recess area, help students identify different parts of the sky. a. Horizon – distant horizontal line where the sky meets the ground; b. Zenith – point at the top o ...
... Ask children what objects they see in the night sky and list them. Things to Do: 1. From either a classroom window or an outside play or recess area, help students identify different parts of the sky. a. Horizon – distant horizontal line where the sky meets the ground; b. Zenith – point at the top o ...
ASTR-1020: Astronomy II Course Lecture Notes Section III
... 3. M stars have a large amount of molecular absorption features called molecular bands. TiO is very strong in the visible portion of the spectrum. a) C stars (a special class of cool stars) have a higher abundance of carbon (C/O > 1) with respect to the M stars (which have C/O < 1) =⇒ strong C2 and ...
... 3. M stars have a large amount of molecular absorption features called molecular bands. TiO is very strong in the visible portion of the spectrum. a) C stars (a special class of cool stars) have a higher abundance of carbon (C/O > 1) with respect to the M stars (which have C/O < 1) =⇒ strong C2 and ...
Document
... 1. An x-ray source was discovered in the constellation Cygnus in 1972 (Cygnus X-1). X-ray sources are candidates for black holes because matter streaming into black holes will be ionized and greatly accelerated, producing x-rays. 2. A blue supergiant star, about 15 times the mass of the sun, was fou ...
... 1. An x-ray source was discovered in the constellation Cygnus in 1972 (Cygnus X-1). X-ray sources are candidates for black holes because matter streaming into black holes will be ionized and greatly accelerated, producing x-rays. 2. A blue supergiant star, about 15 times the mass of the sun, was fou ...
Stars: from Adolescence to Old Age
... As a star becomes a red giant, its (helium) core continues to shrink, causing its temperature to continue increasing When the core temperature reaches 100 million K, the helium nuclei can fuse to form carbon nuclei through a process called the triple-alpha process In this reaction, three helium nucl ...
... As a star becomes a red giant, its (helium) core continues to shrink, causing its temperature to continue increasing When the core temperature reaches 100 million K, the helium nuclei can fuse to form carbon nuclei through a process called the triple-alpha process In this reaction, three helium nucl ...
The Origin of Stars
... because the star is constantly losing thermal energy from its surface through radiation Is there another form of pressure that can stop contraction? ...
... because the star is constantly losing thermal energy from its surface through radiation Is there another form of pressure that can stop contraction? ...
the K-12 Teacher Resource Packet for
... Astronomy comes from the Greek words for ‘star’ and ‘law.’ As a science, it focuses primarily on the study of space, its objects, and phenomena outside of the Earth itself. The Development of Astronomy Astronomy is considered one of the oldest sciences. The study of the stars and plants began more o ...
... Astronomy comes from the Greek words for ‘star’ and ‘law.’ As a science, it focuses primarily on the study of space, its objects, and phenomena outside of the Earth itself. The Development of Astronomy Astronomy is considered one of the oldest sciences. The study of the stars and plants began more o ...
Starry Dome: Astronomy in Art and the Imagination
... Astronomy comes from the Greek words for ‘star’ and ‘law.’ As a science, it focuses primarily on the study of space, its objects, and phenomena outside of the Earth itself. The Development of Astronomy Astronomy is considered one of the oldest sciences. The study of the stars and plants began more o ...
... Astronomy comes from the Greek words for ‘star’ and ‘law.’ As a science, it focuses primarily on the study of space, its objects, and phenomena outside of the Earth itself. The Development of Astronomy Astronomy is considered one of the oldest sciences. The study of the stars and plants began more o ...