Chapter 3 Notes
... Question for Thought What is the source of the chemical elements of the universe? A B C D E ...
... Question for Thought What is the source of the chemical elements of the universe? A B C D E ...
Telescopes and Optics
... – Space-based Observatories Figure 6-27 • Transparency of the atmosphere is not a problem (ultraviolet and far-infrared). • Atmospheric turbulence is not a problem (diffraction limited images). • Sky background is lower. • NASA’s Great Observatories Program Hubble Space Telescope (UV, optical, and I ...
... – Space-based Observatories Figure 6-27 • Transparency of the atmosphere is not a problem (ultraviolet and far-infrared). • Atmospheric turbulence is not a problem (diffraction limited images). • Sky background is lower. • NASA’s Great Observatories Program Hubble Space Telescope (UV, optical, and I ...
Right Ascension
... In practice, the Hubble Space Telescope can achieve its diffractionlimited resolution, but the Keck could not, originally. This is because the Keck is on the surface of the Earth, underneath the atmosphere. The atmosphere is in constant motion, and this 'smears' images out a bit. It is the reason st ...
... In practice, the Hubble Space Telescope can achieve its diffractionlimited resolution, but the Keck could not, originally. This is because the Keck is on the surface of the Earth, underneath the atmosphere. The atmosphere is in constant motion, and this 'smears' images out a bit. It is the reason st ...
January
... Except for the probes that have been sent to the planets, astronomers cannot reach out and touch their experiment, which is the universe itself. One of the key measurements in Astronomy is distance. To measure distances, the astronomer must rely on the light from any object. Distances are then deter ...
... Except for the probes that have been sent to the planets, astronomers cannot reach out and touch their experiment, which is the universe itself. One of the key measurements in Astronomy is distance. To measure distances, the astronomer must rely on the light from any object. Distances are then deter ...
Unit 1
... 10. If the universe were contracting instead of expanding, how would we know (what would the observations be)? 11. The Andromeda galaxy and the Milky Way are rushing toward each other at a velocity of 130 km/s (or, 300,000 mph!). We will collide in about 60 billion years. Andromeda is about one and ...
... 10. If the universe were contracting instead of expanding, how would we know (what would the observations be)? 11. The Andromeda galaxy and the Milky Way are rushing toward each other at a velocity of 130 km/s (or, 300,000 mph!). We will collide in about 60 billion years. Andromeda is about one and ...
NASA Launches Space Shuttle on Historic Final Mission House
... dusk, with Saturn and Porrima farther right as shown here. Get your telescope on all these objects early; they move lower later in the evening. Saturday, July 9 · Titan, the brightest satellite of Saturn, can be found in a telescope about four ring-lengths west of Saturn this evening and tomorrow ev ...
... dusk, with Saturn and Porrima farther right as shown here. Get your telescope on all these objects early; they move lower later in the evening. Saturday, July 9 · Titan, the brightest satellite of Saturn, can be found in a telescope about four ring-lengths west of Saturn this evening and tomorrow ev ...
Comprehensive Census and Complete Characterization of Nearby
... using a five arc second search radius returned over 513,000 stars. A number of further criteria were implemented to ensure high quality photometry for SED fitting, that we can eliminate as many giants as possible since only Hipparcos stars have precise distance measurements, and finally that the stars ...
... using a five arc second search radius returned over 513,000 stars. A number of further criteria were implemented to ensure high quality photometry for SED fitting, that we can eliminate as many giants as possible since only Hipparcos stars have precise distance measurements, and finally that the stars ...
4.1 Detectability of extrasolar planets
... Planets are easiest to detect when they are young and hot (Figure 7), because they will be bright at near infrared wavelengths (2.1.2). This would suggest that studying the earliest phases of planet formation should be straightforward. The cooling tracks (Figure 7) also illustrate an important aspec ...
... Planets are easiest to detect when they are young and hot (Figure 7), because they will be bright at near infrared wavelengths (2.1.2). This would suggest that studying the earliest phases of planet formation should be straightforward. The cooling tracks (Figure 7) also illustrate an important aspec ...
December - Rose City Astronomers
... near NGC 4319. Interestingly, while I was observing 4319 both Chuck Dethloff and Candace Pratt were also observing it with their scopes. As is often the case, trading views and perceptions added to what we all saw and made our observations all the more enjoyable. Candace thought that the star-like o ...
... near NGC 4319. Interestingly, while I was observing 4319 both Chuck Dethloff and Candace Pratt were also observing it with their scopes. As is often the case, trading views and perceptions added to what we all saw and made our observations all the more enjoyable. Candace thought that the star-like o ...
Assignment 8 - utoledo.edu
... c. a region of gas and dust where new planets have recently formed d. the shell let go by a dying lowmass star e. a globular cluster, which looks like a planet through very small telescopes ____ 19. When stars become giants, which of the following does NOT usually happen? a. their outer envelopes e ...
... c. a region of gas and dust where new planets have recently formed d. the shell let go by a dying lowmass star e. a globular cluster, which looks like a planet through very small telescopes ____ 19. When stars become giants, which of the following does NOT usually happen? a. their outer envelopes e ...
Telescopes—
... but by the time you get past 4th order there isn’t so much point in consider the separate terms of the expansion. It is instructive to look at a couple of the 4th order terms. The xp^3 term, for instance, still represents a term which is linear in x, so that it doesn’t really alter the nature of the ...
... but by the time you get past 4th order there isn’t so much point in consider the separate terms of the expansion. It is instructive to look at a couple of the 4th order terms. The xp^3 term, for instance, still represents a term which is linear in x, so that it doesn’t really alter the nature of the ...
11 Celestial Objects and Events Every Stargazer Should See
... tled into their nighttime routine. In the final moments before totality, bright beads of light appear along the limb of the merged disks– they are called Baileyʼs Beads— caused by the edge of the Sun shining through lunar valleys. As the Sun shines through a single valley just before and after tota ...
... tled into their nighttime routine. In the final moments before totality, bright beads of light appear along the limb of the merged disks– they are called Baileyʼs Beads— caused by the edge of the Sun shining through lunar valleys. As the Sun shines through a single valley just before and after tota ...
Document
... • This is true for other galaxies as well • Pop II stars may have elongated tilted orbits whereas Pop I stars orbits are in the disk ...
... • This is true for other galaxies as well • Pop II stars may have elongated tilted orbits whereas Pop I stars orbits are in the disk ...
Answer to question 1 - Northwestern University
... calibrate other methods. Requirements for methods: • Bright enough to measure far beyond 15 Mpc (distance to Virgo z = about 0.003, v = about 1000 km/sec) • Numerous or frequent enough to get 30-100 data points ( to define a “Hubble relation” => v = H0D) ...
... calibrate other methods. Requirements for methods: • Bright enough to measure far beyond 15 Mpc (distance to Virgo z = about 0.003, v = about 1000 km/sec) • Numerous or frequent enough to get 30-100 data points ( to define a “Hubble relation” => v = H0D) ...
The Outer Planets: Mercury, Venus, Earth and Mars How are the
... 4. Describe characteristics of our Milky Way galaxy. What are some interesting facts about our galaxy? ...
... 4. Describe characteristics of our Milky Way galaxy. What are some interesting facts about our galaxy? ...
pluto
... Gravity about 6% of Earth's Surface temperature -233C Nasa probe visits in 2015 Its orbit around the Sun is also highly tilted compared with the plane of the big planets. In addition, since the early 1990s, astronomers have found several objects of comparable size to Pluto in an outer region of the ...
... Gravity about 6% of Earth's Surface temperature -233C Nasa probe visits in 2015 Its orbit around the Sun is also highly tilted compared with the plane of the big planets. In addition, since the early 1990s, astronomers have found several objects of comparable size to Pluto in an outer region of the ...
Vibration Isolation in Electro-Optical Spacecraft
... There was insufficient time to organize the material to the author’s liking. Hopefully the Powerpoint presentation will have a better structure. 2. Background: two telescopes considered a. Hubble Telescope. 2.4 meter aperture primary mirror, fore-optics of RicheyChrétien (two-mirror) design. RC desi ...
... There was insufficient time to organize the material to the author’s liking. Hopefully the Powerpoint presentation will have a better structure. 2. Background: two telescopes considered a. Hubble Telescope. 2.4 meter aperture primary mirror, fore-optics of RicheyChrétien (two-mirror) design. RC desi ...
Slide 1 - Typepad
... Introduction to Nebulae Observing Nebulae in ‘young’ star clusters Past the near objects, the planets, and beyond the double and variable stars is a special realm. Here are the star clusters, gas clouds and star nurseries. For most purposes it can be assumed that the stars in a given cluster formed ...
... Introduction to Nebulae Observing Nebulae in ‘young’ star clusters Past the near objects, the planets, and beyond the double and variable stars is a special realm. Here are the star clusters, gas clouds and star nurseries. For most purposes it can be assumed that the stars in a given cluster formed ...
Stellar Evolution - Hays High Indians
... “This next image is one of the most spectacular views of 1987A yet acquired by the HST. The single large bright light is a star beyond the supernova environs. Around the central supernova is a single ring but associated with the expansion of expelled gases are also a pair of rings further away that ...
... “This next image is one of the most spectacular views of 1987A yet acquired by the HST. The single large bright light is a star beyond the supernova environs. Around the central supernova is a single ring but associated with the expansion of expelled gases are also a pair of rings further away that ...
Overview and status of the Kepler Mission - Harvard
... since the objective of the mission is to perform photometry and not take images. On average there are 32 pixels of interest per star, including some additional pixels surrounding each star. To preclude saturation of the brighter stars of interest, the CCDs are read out every three seconds. The reado ...
... since the objective of the mission is to perform photometry and not take images. On average there are 32 pixels of interest per star, including some additional pixels surrounding each star. To preclude saturation of the brighter stars of interest, the CCDs are read out every three seconds. The reado ...
Hubble Error: Time, Money and Millionths of an inch
... brought in a cot and set it up in a trailer in the parking lot. Opticians traditionally did their work with a kind of black magic, even rubbing their thumbs along a lens or minor to apply the finishing touch. But unlike other Old World opticians in the industry, Geissler fully embraced the idea that ...
... brought in a cot and set it up in a trailer in the parking lot. Opticians traditionally did their work with a kind of black magic, even rubbing their thumbs along a lens or minor to apply the finishing touch. But unlike other Old World opticians in the industry, Geissler fully embraced the idea that ...
LOW MASS STAR FORMATION
... Other differences between low- and high-mass star formation • Physical properties of clouds undergoing low- and highmass star formation are different: – Massive SF: clouds are warmer, larger, more massive, mainly located in spiral arms; high mass stars form in clusters and ...
... Other differences between low- and high-mass star formation • Physical properties of clouds undergoing low- and highmass star formation are different: – Massive SF: clouds are warmer, larger, more massive, mainly located in spiral arms; high mass stars form in clusters and ...
Unit 4 Space
... Our solar system is full of planets, moons, asteroids and comets, all of which revolve around the Sun at the center. When a star forms from a nebula, gravity pulls most of the material into the new star, but some may also clump together to form objects in a solar system. • A planet is a celestial bo ...
... Our solar system is full of planets, moons, asteroids and comets, all of which revolve around the Sun at the center. When a star forms from a nebula, gravity pulls most of the material into the new star, but some may also clump together to form objects in a solar system. • A planet is a celestial bo ...
`Daniel` – The Colonization of Tiamat
... limit of stars has concluded: these “galaxies far, far away” are actually “solar systems close, close nearby.” And for those of us that remain “uncommitted investigators” and are able to actually consider this radically new concept—and the estimated 100 billion “galaxies,” a.k.a. “solar systems” wit ...
... limit of stars has concluded: these “galaxies far, far away” are actually “solar systems close, close nearby.” And for those of us that remain “uncommitted investigators” and are able to actually consider this radically new concept—and the estimated 100 billion “galaxies,” a.k.a. “solar systems” wit ...
Spitzer Space Telescope
The Spitzer Space Telescope (SST), formerly the Space Infrared Telescope Facility (SIRTF), is an infrared space observatory launched in 2003. It is the fourth and final of the NASA Great Observatories program.The planned mission period was to be 2.5 years with a pre-launch expectation that the mission could extend to five or slightly more years until the onboard liquid helium supply was exhausted. This occurred on 15 May 2009. Without liquid helium to cool the telescope to the very low temperatures needed to operate, most of the instruments are no longer usable. However, the two shortest-wavelength modules of the IRAC camera are still operable with the same sensitivity as before the cryogen was exhausted, and will continue to be used in the Spitzer Warm Mission. All Spitzer data, from both the primary and warm phases, are archived at the Infrared Science Archive (IRSA).In keeping with NASA tradition, the telescope was renamed after its successful demonstration of operation, on 18 December 2003. Unlike most telescopes that are named after famous deceased astronomers by a board of scientists, the new name for SIRTF was obtained from a contest open to the general public.The contest led to the telescope being named in honor of astronomer Lyman Spitzer, who had promoted the concept of space telescopes in the 1940s. Spitzer wrote a 1946 report for RAND Corporation describing the advantages of an extraterrestrial observatory and how it could be realized with available or upcoming technology. He has been cited for his pioneering contributions to rocketry and astronomy, as well as ""his vision and leadership in articulating the advantages and benefits to be realized from the Space Telescope Program.""The US$800 million Spitzer was launched from Cape Canaveral Air Force Station, on a Delta II 7920H ELV rocket, Monday, 25 August 2003 at 13:35:39 UTC-5 (EDT).It follows a heliocentric instead of geocentric orbit, trailing and drifting away from Earth's orbit at approximately 0.1 astronomical unit per year (a so-called ""earth-trailing"" orbit). The primary mirror is 85 centimeters (33 in) in diameter, f/12, made of beryllium and is cooled to 5.5 K (−449.77 °F). The satellite contains three instruments that allow it to perform astronomical imaging and photometry from 3 to 180 micrometers, spectroscopy from 5 to 40 micrometers, and spectrophotometry from 5 to 100 micrometers.