CosmologyL1
... provide detailed optical images covering more than a quarter of the sky, and a 3-dimensional map of about a million galaxies and quasars. SDSS uses 2.5-meter telescope on Apache Point, NM, equipped with two powerful special-purpose instruments. The 120-megapixel camera can image 1.5 square degrees o ...
... provide detailed optical images covering more than a quarter of the sky, and a 3-dimensional map of about a million galaxies and quasars. SDSS uses 2.5-meter telescope on Apache Point, NM, equipped with two powerful special-purpose instruments. The 120-megapixel camera can image 1.5 square degrees o ...
stellar_explosions - UT Austin (Astronomy)
... E.g. Crab Nebula (explosion in 1054 A.D. recorded by Chinese and Native Americans). Hundreds of these are known (see illustrations in book for the interesting forms that are produced). How can you prove that the SNR is from the 1054 A.D. SN? Observed radial velocities of a few thousand km/sec gives ...
... E.g. Crab Nebula (explosion in 1054 A.D. recorded by Chinese and Native Americans). Hundreds of these are known (see illustrations in book for the interesting forms that are produced). How can you prove that the SNR is from the 1054 A.D. SN? Observed radial velocities of a few thousand km/sec gives ...
Stellar Evolution Chapter 12
... recent maximum can be used to predict the time of a future maximum. Suppose that you calculate the time of future maximum brightness and then make measurements to observe this maximum. After the correction for Earth's orbital position has been made, you find that the maximum occurred a few minutes l ...
... recent maximum can be used to predict the time of a future maximum. Suppose that you calculate the time of future maximum brightness and then make measurements to observe this maximum. After the correction for Earth's orbital position has been made, you find that the maximum occurred a few minutes l ...
• This chapter concentrates on five goals:
... companion and so is a member of a visual binary system. Adaptive optics observations have discovered a faint close companion of Alcor, not pictured in this diagram. (b) Spectra of Mizar recorded at different times show that it is a spectroscopic binary system rather than a single star. ...
... companion and so is a member of a visual binary system. Adaptive optics observations have discovered a faint close companion of Alcor, not pictured in this diagram. (b) Spectra of Mizar recorded at different times show that it is a spectroscopic binary system rather than a single star. ...
3.2a Right Ascension and Declination
... celestial equator moving North (the Vernal/Spring equinox). Two hours later, the stars will have drifted 30˚ across the night sky. The term Right Ascension (RA) in effect represents the hours (angular distance eastwards) from the reference point that a particular celestial object will be. As an exam ...
... celestial equator moving North (the Vernal/Spring equinox). Two hours later, the stars will have drifted 30˚ across the night sky. The term Right Ascension (RA) in effect represents the hours (angular distance eastwards) from the reference point that a particular celestial object will be. As an exam ...
Intelligent Life in the Milky Way Galaxy
... "A civilization out there could be a thousand years ...
... "A civilization out there could be a thousand years ...
ALMA_BoJun605_Gruppioni
... The pixel size in both images is 12 arc seconds. The continuum emission of cold dust closely follows the spiral pattern traced by the CO emission and correlates poorly with the emission from neutral hydrogen HI clouds. Similar results have been obtained by mapping the "edge-on" galaxy NGC 891, where ...
... The pixel size in both images is 12 arc seconds. The continuum emission of cold dust closely follows the spiral pattern traced by the CO emission and correlates poorly with the emission from neutral hydrogen HI clouds. Similar results have been obtained by mapping the "edge-on" galaxy NGC 891, where ...
Worksheet
... matter very much (doing so through the weak nuclear force). Until very recently, we did not know if it had any mass (without mass, like a photon, it would travel at the speed of light). Because it interacts very little with other matter, it was known that most neutrinos should "fly" out of the Sun, ...
... matter very much (doing so through the weak nuclear force). Until very recently, we did not know if it had any mass (without mass, like a photon, it would travel at the speed of light). Because it interacts very little with other matter, it was known that most neutrinos should "fly" out of the Sun, ...
The Milky Way
... diameter; contains Pop I stars (but low density). • THIN DISK ~500 pc thick: contains MOST stars; includes spiral arms and great majority of luminosity. • DUST DISK only 50 pc thick; new stars are born in the molecular clouds found within this very thin disk. • SPIRAL ARMS are wrapped within the dus ...
... diameter; contains Pop I stars (but low density). • THIN DISK ~500 pc thick: contains MOST stars; includes spiral arms and great majority of luminosity. • DUST DISK only 50 pc thick; new stars are born in the molecular clouds found within this very thin disk. • SPIRAL ARMS are wrapped within the dus ...
27/04/2016 - Daphne`s Daily Quiz
... 7. Which national park in New Zealand received UNESCO world heritage status, both on cultural and on natural grounds, and is the oldest National Park in New Zealand? ...
... 7. Which national park in New Zealand received UNESCO world heritage status, both on cultural and on natural grounds, and is the oldest National Park in New Zealand? ...
High-Speed Ballistic Stellar Interlopers
... Astronomers have discovered a new class of bright, high-velocity stars speeding through the galaxy. Called “ballistic stellar interlopers,” the stars are plowing through dense regions of interstellar gas at velocities possibly as high as 100,000 miles per hour. As they do, they create brilliant arro ...
... Astronomers have discovered a new class of bright, high-velocity stars speeding through the galaxy. Called “ballistic stellar interlopers,” the stars are plowing through dense regions of interstellar gas at velocities possibly as high as 100,000 miles per hour. As they do, they create brilliant arro ...
Document
... Luminosity variables – size of star • For stars with the same surface temperature the bigger the star the more energy it gives out. • A star with double the radius of another one will have an area four times as great and so have a luminosity four times greater than the first star ...
... Luminosity variables – size of star • For stars with the same surface temperature the bigger the star the more energy it gives out. • A star with double the radius of another one will have an area four times as great and so have a luminosity four times greater than the first star ...
Test 3
... 21) What's faster? a) a laser beam b) radio waves c) same speed for both 22) An object coming toward you exhibits a a) redshift b) blueshift 23) Suppose you have two stars tugging on each other with a force of 10 38 Newtons of force. Now you double the distance between them. What is the new force? a ...
... 21) What's faster? a) a laser beam b) radio waves c) same speed for both 22) An object coming toward you exhibits a a) redshift b) blueshift 23) Suppose you have two stars tugging on each other with a force of 10 38 Newtons of force. Now you double the distance between them. What is the new force? a ...
lecture11
... planes new position, but the old crest keeps moving out in a circle from the planes original position The same thing happens again at a later time ...
... planes new position, but the old crest keeps moving out in a circle from the planes original position The same thing happens again at a later time ...
Some Basic Principles from Astronomy
... ⊲ We haven’t made any comment on how bright a source is at a given wavelength λ of light! As such, this is called the bolometric magnitude, the brightness integrated across all wavelengths. Later we will talk about band magnitudes — the brightness over certain limited regions of the spectrum. ⊲ This ...
... ⊲ We haven’t made any comment on how bright a source is at a given wavelength λ of light! As such, this is called the bolometric magnitude, the brightness integrated across all wavelengths. Later we will talk about band magnitudes — the brightness over certain limited regions of the spectrum. ⊲ This ...
Distances of the Stars
... The smallest parallax measurable from the ground is about 0.01-arcsec • Measure distances out to ~100 pc • Get 10% distances only to a few parsecs. • But, only a few hundred stars this close ...
... The smallest parallax measurable from the ground is about 0.01-arcsec • Measure distances out to ~100 pc • Get 10% distances only to a few parsecs. • But, only a few hundred stars this close ...
Islip Invitational 2013 Astronomy Examination Student
... a. Most stars are born inside dusty clouds which block any light that may be coming from the stars. b. Protostars which are not yet performing fusion do not give off a lot of visible light. c. The size of a newly forming star is typically quite small and thus hard to make out d. Birth happens very q ...
... a. Most stars are born inside dusty clouds which block any light that may be coming from the stars. b. Protostars which are not yet performing fusion do not give off a lot of visible light. c. The size of a newly forming star is typically quite small and thus hard to make out d. Birth happens very q ...
Galaxies and the Universe bb
... • _____ extending from nucleus • About 30% of all galaxies • Large diameter of 20,000 to 125,000 light years • Contains both _______ and ___ stars • e.g., Milky Way ...
... • _____ extending from nucleus • About 30% of all galaxies • Large diameter of 20,000 to 125,000 light years • Contains both _______ and ___ stars • e.g., Milky Way ...
Ursa Major
Ursa Major /ˈɜrsə ˈmeɪdʒər/ (also known as the Great Bear and Charles' Wain) is a constellation in the northern celestial hemisphere. One of the 48 constellations listed by Ptolemy (second century AD), it remains one of the 88 modern constellations. It can be visible throughout the year in most of the northern hemisphere. Its name, Latin for ""the greater (or larger) she-bear"", stands as a reference to and in direct contrast with Ursa Minor, ""the smaller she-bear"", with which it is frequently associated in mythology and amateur astronomy. The constellation's most recognizable asterism, a group of seven relatively bright stars commonly known as the ""Big Dipper"", ""the Wagon"" or ""the Plough"" (among others), both mimicks the shape of the lesser bear (the ""Little Dipper"") and is commonly used as a navigational pointer towards the current northern pole star, Polaris in Ursa Minor. The Big Dipper and the constellation as a whole have mythological significance in numerous world cultures, usually as a symbol of the north.The third largest constellation in the sky, Ursa Major is home to many deep-sky objects including seven Messier objects, four other NGC objects and I Zwicky 18, the youngest known galaxy in the visible universe.