Lecture 19 Brightness Units
... are all due to absorption by atoms starting from the second energy state. – The only way an atom gets into this state is by being hit by a neighbor, and the neighbors at these temperatures are not moving fast enough. Balmer lines are weak. Mar 3, 2006 ...
... are all due to absorption by atoms starting from the second energy state. – The only way an atom gets into this state is by being hit by a neighbor, and the neighbors at these temperatures are not moving fast enough. Balmer lines are weak. Mar 3, 2006 ...
Student Exploration Sheet: Growing Plants
... If a star is moving away from an observer, spectral lines are redshifted, or shifted toward the red end of the spectrum. An approaching star is blueshifted. ...
... If a star is moving away from an observer, spectral lines are redshifted, or shifted toward the red end of the spectrum. An approaching star is blueshifted. ...
Galaxies
... • Extends 50,000 light years beyond the central bulge • Forms spiral arms that contain a lot of gas and dust • Population I stars are found in the spiral arms – these are young O and B main-sequence stars – they are often found in open clusters ...
... • Extends 50,000 light years beyond the central bulge • Forms spiral arms that contain a lot of gas and dust • Population I stars are found in the spiral arms – these are young O and B main-sequence stars – they are often found in open clusters ...
Lecture Ten - The Sun Amongst the Stars Part II
... So why are there so many M dwarfs? Does the star formation process strongly favor the production of such stars? Or is there some other process at work ‘removing’ hotter and more luminous stars from the populations we observe? The answer requires us to know how stars change over time, and therefore t ...
... So why are there so many M dwarfs? Does the star formation process strongly favor the production of such stars? Or is there some other process at work ‘removing’ hotter and more luminous stars from the populations we observe? The answer requires us to know how stars change over time, and therefore t ...
Physics@Brock - Brock University
... 1. During May the constellation Cancer is visible near the Western Horizon. However in June the Cancer is no longer visible in the night sky. The reason for that is that (a) the Earth is spinning about North-South axis. (b) the Earth is revolving around the Sun. (c) the Earth has rotational axis tip ...
... 1. During May the constellation Cancer is visible near the Western Horizon. However in June the Cancer is no longer visible in the night sky. The reason for that is that (a) the Earth is spinning about North-South axis. (b) the Earth is revolving around the Sun. (c) the Earth has rotational axis tip ...
What is Epsilon Aurigae?
... -Bright naked eye object. Presence of eclipses first reported in 1821. -Eclipses last almost 2 years, and happen every 27.1 years (mid-eclipse ~5 Aug 2010) ...
... -Bright naked eye object. Presence of eclipses first reported in 1821. -Eclipses last almost 2 years, and happen every 27.1 years (mid-eclipse ~5 Aug 2010) ...
The Evening Sky Map
... Conjunction – An alignment of two celestial bodies such that they present the least angular separation as viewed from Earth. Constellation – A defined area of the sky containing a star pattern. Diffuse Nebula – A cloud of gas illuminated by nearby stars. Double Star – Two stars that appear close to ...
... Conjunction – An alignment of two celestial bodies such that they present the least angular separation as viewed from Earth. Constellation – A defined area of the sky containing a star pattern. Diffuse Nebula – A cloud of gas illuminated by nearby stars. Double Star – Two stars that appear close to ...
Astronomy_Stellar_Evolution_and_Type_II_Supernovae_Exam
... 12) 200,000 light years away the Small Magellanic Cloud is a ‘little brother’ to our Milky Way. What “super-bubble rich” component of this cloud is particularly useful in the study of Stellar Life Cycles? 13) This Nebula in the Sagittarius arm of our Milky Way Galaxy is actually just one of six brig ...
... 12) 200,000 light years away the Small Magellanic Cloud is a ‘little brother’ to our Milky Way. What “super-bubble rich” component of this cloud is particularly useful in the study of Stellar Life Cycles? 13) This Nebula in the Sagittarius arm of our Milky Way Galaxy is actually just one of six brig ...
ANSWER
... ANSWER: Jupiter, Saturn, Uranus, Neptune 6. What is the difference between the sizes of the terrestrial and gas giant planets? ANSWER: Terrestrial planets are smaller than gas giant planets. 7. What is the difference between the distance between the terrestrial and gas giant planets? ANSWER: The dis ...
... ANSWER: Jupiter, Saturn, Uranus, Neptune 6. What is the difference between the sizes of the terrestrial and gas giant planets? ANSWER: Terrestrial planets are smaller than gas giant planets. 7. What is the difference between the distance between the terrestrial and gas giant planets? ANSWER: The dis ...
What is a Star - Optics Institute of Southern California
... lifetime of a main sequence star. More massive stars have greater central temperatures and densities and so exhaust their nuclear fuel more rapidly (in spite of the fact that they have more of it) than do lower mass stars. It turns out that the main sequence lifetime is a sensitive function of mass. ...
... lifetime of a main sequence star. More massive stars have greater central temperatures and densities and so exhaust their nuclear fuel more rapidly (in spite of the fact that they have more of it) than do lower mass stars. It turns out that the main sequence lifetime is a sensitive function of mass. ...
Stellar Astronomy Sample Questions for Exam 3
... 2. Describe some of the evidence we have for how we think solar systems like ours form. Where do they form? What types of objects have been observed? How do the observations compare to the nebular model of solar system formation? 3. Describe the hunt for extra-solar planets. What kinds of techniques ...
... 2. Describe some of the evidence we have for how we think solar systems like ours form. Where do they form? What types of objects have been observed? How do the observations compare to the nebular model of solar system formation? 3. Describe the hunt for extra-solar planets. What kinds of techniques ...
The Basics of the Universe
... material - assuming that we can obtain any - has as much mass as Mount Everest. Some of these are called magnetars, while others are called pulsars. Neutron stars spin very rapidly, and this causes them to have very strong magnetic fields, and the ones with the strongest are called magnetars. Pulsar ...
... material - assuming that we can obtain any - has as much mass as Mount Everest. Some of these are called magnetars, while others are called pulsars. Neutron stars spin very rapidly, and this causes them to have very strong magnetic fields, and the ones with the strongest are called magnetars. Pulsar ...
The Death of High Mass Stars
... •Variability of 0.07mag implies orbit inclination of 30 degrees •Period combined with velocities from orbital parameters yields total system mass of ~23Msun •Mass of unseen companion: 8Msun (or at least more than 4Msun) •X-ray variability implies small source of origin (5ms -- <1500km) •Black hole! ...
... •Variability of 0.07mag implies orbit inclination of 30 degrees •Period combined with velocities from orbital parameters yields total system mass of ~23Msun •Mass of unseen companion: 8Msun (or at least more than 4Msun) •X-ray variability implies small source of origin (5ms -- <1500km) •Black hole! ...
Formation of the Solar System
... Not the details and oddities – such as Venus’ and Uranus’ retrograde ...
... Not the details and oddities – such as Venus’ and Uranus’ retrograde ...
Color-Magnitude Diagram Lab Manual
... the coordinates. Click on Slew in the telescope control panel, and select Observation Hot List, clicking on View/Select from list. By double-clicking on each star in the list, its coordinates will automatically be entered into the telescope. Hit Ok and the telescope will slew to the target star. 2. ...
... the coordinates. Click on Slew in the telescope control panel, and select Observation Hot List, clicking on View/Select from list. By double-clicking on each star in the list, its coordinates will automatically be entered into the telescope. Hit Ok and the telescope will slew to the target star. 2. ...
Name
... 15) Main sequence stars tend to have this trait in common with each other. A) They all tend to fuse Hydrogen into Helium B) They all tend to have similar diameters. C) They all tend to have similar temperatures. D) They all tend to have similar masses. E) They all tend to fuse Helium into Carbon. 16 ...
... 15) Main sequence stars tend to have this trait in common with each other. A) They all tend to fuse Hydrogen into Helium B) They all tend to have similar diameters. C) They all tend to have similar temperatures. D) They all tend to have similar masses. E) They all tend to fuse Helium into Carbon. 16 ...
S T A R S
... This is the smallest constellation. Acrux is a triple system and the brightest pair of the three are about 3000 and 1900 times more luminous than our sun. The distance between the pair is about 6 times the distance across our solar system. Alpha, Beta, Delta, Zeta plus some stars in Scorpius and Cen ...
... This is the smallest constellation. Acrux is a triple system and the brightest pair of the three are about 3000 and 1900 times more luminous than our sun. The distance between the pair is about 6 times the distance across our solar system. Alpha, Beta, Delta, Zeta plus some stars in Scorpius and Cen ...
Cygnus (constellation)
Cygnus /ˈsɪɡnəs/ is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan. The swan is one of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross (in contrast to the Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains Deneb, one of the brightest stars in the night sky and one corner of the Summer Triangle, as well as some notable X-ray sources and the giant stellar association of Cygnus OB2. One of the stars of this association, NML Cygni, is one of the largest stars currently known. The constellation is also home to Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a black hole. Many star systems in Cygnus have known planets as a result of the Kepler Mission observing one patch of the sky, the patch is the area around Cygnus. In addition, most of the eastern part of Cygnus is dominated by the Hercules–Corona Borealis Great Wall, a giant galaxy filament that is the largest known structure in the observable universe; covering most of the northern sky.