Two-Gyro Performance, Scheduling and Acquisitions
... – This problem was identified by the OTA SEs in some follow-on analysis of the previous problem’s test results. However, the cause of this problem is different. – Problem only occurs with Target-ReAcq style Acqs/ReAcqs where both PASS and the onboard ReAcq process are effectively accounting for a po ...
... – This problem was identified by the OTA SEs in some follow-on analysis of the previous problem’s test results. However, the cause of this problem is different. – Problem only occurs with Target-ReAcq style Acqs/ReAcqs where both PASS and the onboard ReAcq process are effectively accounting for a po ...
Measuring the distance to Galaxies
... variables can be determined by parallax (a method you will learn in this course) The inverse square law and the periodluminosity relationship of Henrietta Leavitt enables the distance of all observable Cepheid variables to be determined ...
... variables can be determined by parallax (a method you will learn in this course) The inverse square law and the periodluminosity relationship of Henrietta Leavitt enables the distance of all observable Cepheid variables to be determined ...
Lec 25.2- STELLAR EVOLUTION SUMMARY
... all of the matter between the stars. Gravity is a key to star evolution. You may recall that according to Newton's law of gravity, all bodies, from the largest objects to the smallest particles in the universe, attract each other. Thus, the gas and dust particles of the vast interstellar' clouds exe ...
... all of the matter between the stars. Gravity is a key to star evolution. You may recall that according to Newton's law of gravity, all bodies, from the largest objects to the smallest particles in the universe, attract each other. Thus, the gas and dust particles of the vast interstellar' clouds exe ...
Sirius Astronomer - Orange County Astronomers
... ordinary matter, is composed of hot gas between galaxies, and in some places that gas has been seen in X-rays. A new technique has been used to observe more of that hot gas. Chandra and XMM-Newton (orbiting X-ray observatories) have been used to observe some distant (2 billion light-years) quasars a ...
... ordinary matter, is composed of hot gas between galaxies, and in some places that gas has been seen in X-rays. A new technique has been used to observe more of that hot gas. Chandra and XMM-Newton (orbiting X-ray observatories) have been used to observe some distant (2 billion light-years) quasars a ...
SECTION 30.2 Measuring the Stars 1. Constellations are a. the
... d. found only in the northern hemisphere. 2. Ursa Major, or the big dipper, is an example of a a. circumpolar constellation. b. constellation that can be seen only in winter. c. constellation that can be seen only in summer. d. constellation that can be seen only in the fall. 3. Scientists measure d ...
... d. found only in the northern hemisphere. 2. Ursa Major, or the big dipper, is an example of a a. circumpolar constellation. b. constellation that can be seen only in winter. c. constellation that can be seen only in summer. d. constellation that can be seen only in the fall. 3. Scientists measure d ...
July - astra
... cury, Venus, Mars, Jupiter and Saturn. Venus is extremely bright Open clusters reside in our Milky Way Galaxy. Our Sun is no and hugs close to the Sun, so you see it for a short time in the longer in its group. west after sunset or in the east before sunrise. Jupiter can be out Globular Clusters loo ...
... cury, Venus, Mars, Jupiter and Saturn. Venus is extremely bright Open clusters reside in our Milky Way Galaxy. Our Sun is no and hugs close to the Sun, so you see it for a short time in the longer in its group. west after sunset or in the east before sunrise. Jupiter can be out Globular Clusters loo ...
How many stars are in the Milky Way Galaxy?
... 1: Draw and label diagrams of the Milky Way from top and side views, showing the major components. Indicate the approximate dimensions of the components and note the location of the Sun in each diagram. 2: Describe the galactic distribution of general interstellar material, nebulae, and open and glo ...
... 1: Draw and label diagrams of the Milky Way from top and side views, showing the major components. Indicate the approximate dimensions of the components and note the location of the Sun in each diagram. 2: Describe the galactic distribution of general interstellar material, nebulae, and open and glo ...
The Universe and Galaxies - West Jefferson Local Schools
... - time is required for light to travel through space - light travels a little over 8 minutes from the sun to earth - the farther away an object/star is, the longer it takes for light to get to us, and the older the light is when it gets to us = “Light is OLD” - we see the past of other stars in the ...
... - time is required for light to travel through space - light travels a little over 8 minutes from the sun to earth - the farther away an object/star is, the longer it takes for light to get to us, and the older the light is when it gets to us = “Light is OLD” - we see the past of other stars in the ...
The Southern Fall PDF - Treasures of the Southern Sky
... The vast Carina Nebula contains over a dozen stars with masses between 50 to 100 times that of the Sun, and these are the main source of illumination of the nebula itself. However, by far the most exotic star here is Eta Carinae. It is shrouded in a tiny nebula — the expanding, dumbbell-shaped Homu ...
... The vast Carina Nebula contains over a dozen stars with masses between 50 to 100 times that of the Sun, and these are the main source of illumination of the nebula itself. However, by far the most exotic star here is Eta Carinae. It is shrouded in a tiny nebula — the expanding, dumbbell-shaped Homu ...
The Universe - staff.harrisonburg.k12.va
... because it does not have to view things through our atmosphere ...
... because it does not have to view things through our atmosphere ...
Science 8 Name: Unit 2 Astronomy Date: Period: LAB
... The Hertzsprung-Russell Diagram is actually an elaborate graph that illustrates the relationship that exists between the average surface temperature of stars and their absolute magnitude. Absolute magnitude is how bright stars would appear to be if they were all the same distance away from Earth. Ra ...
... The Hertzsprung-Russell Diagram is actually an elaborate graph that illustrates the relationship that exists between the average surface temperature of stars and their absolute magnitude. Absolute magnitude is how bright stars would appear to be if they were all the same distance away from Earth. Ra ...
Which of the following is the best description of an Sc galaxy? A) a
... brighter and cooler than it really is. brighter and hotter than it really is. fainter and cooler than it really is. fainter and hotter than it really is. unchanged in brightness or apparent color. ...
... brighter and cooler than it really is. brighter and hotter than it really is. fainter and cooler than it really is. fainter and hotter than it really is. unchanged in brightness or apparent color. ...
Observational Astronomy Star Charts
... sky by its altitude (a) above the horizon... ...and by its angular distance from the northmost point on our horizon, i.e. its azimuth (A) ... ...both measured in degrees. ...
... sky by its altitude (a) above the horizon... ...and by its angular distance from the northmost point on our horizon, i.e. its azimuth (A) ... ...both measured in degrees. ...
Astronomy.Practice.Quiz3
... 13. After the red giant phase, the next phase for a medium mass star is: a. nova b. planetary nebula c. white dwarf 14. This is how bright a star appears on Earth. a. apparent magnitude b. absolute magnitude ...
... 13. After the red giant phase, the next phase for a medium mass star is: a. nova b. planetary nebula c. white dwarf 14. This is how bright a star appears on Earth. a. apparent magnitude b. absolute magnitude ...
Lecture 5
... Mass-Luminosity Relation for MainSequence Stars • Main sequence stars are stars like the Sun but with different masses • The mass-luminosity relation expresses a direct correlation between mass and luminosity for main-sequence stars • The greater the mass of a main-sequence star, the greater its lu ...
... Mass-Luminosity Relation for MainSequence Stars • Main sequence stars are stars like the Sun but with different masses • The mass-luminosity relation expresses a direct correlation between mass and luminosity for main-sequence stars • The greater the mass of a main-sequence star, the greater its lu ...
Solution Key
... This is just like calculating the distance to the Pleiades, which we did in studio, but in globular clusters, only the low mass stub of the main sequence is visible. You can use any point on that stub to get the distance. For example, at B-V=0.5, the apparent visual magnitude V ≈ 18. The absolute vi ...
... This is just like calculating the distance to the Pleiades, which we did in studio, but in globular clusters, only the low mass stub of the main sequence is visible. You can use any point on that stub to get the distance. For example, at B-V=0.5, the apparent visual magnitude V ≈ 18. The absolute vi ...
Stellar Evolution - Hays High School
... • . . . And so forth, as long as temperatures are high enough to fuse that particular element • As particles that are colliding get larger, much more heat (energy) is needed to get them to stick together ...
... • . . . And so forth, as long as temperatures are high enough to fuse that particular element • As particles that are colliding get larger, much more heat (energy) is needed to get them to stick together ...
The Hertzsprung-Russell Diagram
... Astronomers reasoned that if a star were hotter, it should have a higher luminosity, and a cooler star would be dimmer. As it turns out, most stars fit this pattern. They can be found on the HR Diagram in the large group that stretches across the middle of the diagram. These are called the Main Sequ ...
... Astronomers reasoned that if a star were hotter, it should have a higher luminosity, and a cooler star would be dimmer. As it turns out, most stars fit this pattern. They can be found on the HR Diagram in the large group that stretches across the middle of the diagram. These are called the Main Sequ ...
Unit 1
... • If you plot the positions of variable stars on the HR diagram, many of them fall in the “instability strip” – Most have surface temperatures of ~5000K, so appear yellow – Most are giants (Yellow Giants) – Instability comes from partial absorption of radiation in the interior of the star • Helium a ...
... • If you plot the positions of variable stars on the HR diagram, many of them fall in the “instability strip” – Most have surface temperatures of ~5000K, so appear yellow – Most are giants (Yellow Giants) – Instability comes from partial absorption of radiation in the interior of the star • Helium a ...
the life cycle of stars
... become giants or supergiants (Right) and then down to the left to become white dwarfs. ...
... become giants or supergiants (Right) and then down to the left to become white dwarfs. ...
Ch16: The Milky Way
... and velocity) tells us mass within Sun’s orbit: 1.0 x 1011 MSun The total amount of light suggests ~ few x 109 Msun Dark matter! ...
... and velocity) tells us mass within Sun’s orbit: 1.0 x 1011 MSun The total amount of light suggests ~ few x 109 Msun Dark matter! ...
The Milky Way
... • How does the sky appear to move as Earth rotates? • What causes the seasons? • How can astronomical cycles affect Earth’s climate? As you study the sky and its motions, you will be learning to think of Earth as a planet rotating on its axis. The next chapter will introduce you to some of the most ...
... • How does the sky appear to move as Earth rotates? • What causes the seasons? • How can astronomical cycles affect Earth’s climate? As you study the sky and its motions, you will be learning to think of Earth as a planet rotating on its axis. The next chapter will introduce you to some of the most ...
Nov 2017 - What`s Out Tonight?
... cury, Venus, Mars, Jupiter and Saturn. Venus is extremely bright Open clusters reside in our Milky Way Galaxy. Our Sun is no and hugs close to the Sun, so you see it for a short time in the longer in its group. west after sunset or in the east before sunrise. Jupiter can be out Globular Clusters loo ...
... cury, Venus, Mars, Jupiter and Saturn. Venus is extremely bright Open clusters reside in our Milky Way Galaxy. Our Sun is no and hugs close to the Sun, so you see it for a short time in the longer in its group. west after sunset or in the east before sunrise. Jupiter can be out Globular Clusters loo ...
Serpens
Serpens (""the Serpent"", Greek Ὄφις) is a constellation of the northern hemisphere. One of the 48 constellations listed by the 2nd-century astronomer Ptolemy, it remains one of the 88 modern constellations defined by the International Astronomical Union. It is unique among the modern constellations in being split into two non-contiguous parts, Serpens Caput (Serpent's Head) to the west and Serpens Cauda (Serpent's Tail) to the east. Between these two halves lies the constellation of Ophiuchus, the ""Serpent-Bearer"". In figurative representations, the body of the serpent is represented as passing behind Ophiuchus between Mu Serpentis in Serpens Caput and Nu Serpentis in Serpens Cauda.The brightest star in Serpens is the red giant star Alpha Serpentis, or Unukalhai, in Serpens Caput, with an apparent magnitude of 2.63. Also located in Serpens Caput are the naked-eye globular cluster Messier 5 and the naked-eye variables R Serpentis and Tau4 Serpentis. Notable extragalactic objects include Seyfert's Sextet, one of the densest galaxy clusters known; Arp 220, the prototypical ultraluminous infrared galaxy; and Hoag's Object, the most famous of the very rare class of galaxies known as ring galaxies.Part of the Milky Way's galactic plane passes through Serpens Cauda, which is therefore rich in galactic deep-sky objects, such as the Eagle Nebula (IC 4703) and its associated star cluster Messier 16. The nebula measures 70 light-years by 50 light-years and contains the Pillars of Creation, three dust clouds that became famous for the image taken by the Hubble Space Telescope. Other striking objects include the Red Square Nebula, one of the few objects in astronomy to take on a square shape; and Westerhout 40, a massive nearby star-forming region consisting of a molecular cloud and an H II region.