Stellar evolution, I
... form stars. The “free fall” time of a spherical cloud is given by: Tff = [3/(32 G )]1/2 , where G is Newton's gravitational constant and is the initial density of the cloud. If the density of a cloud is 100 hydrogen atoms per cubic cm and the radius of the cloud is 0.46 parsecs, the cloud cont ...
... form stars. The “free fall” time of a spherical cloud is given by: Tff = [3/(32 G )]1/2 , where G is Newton's gravitational constant and is the initial density of the cloud. If the density of a cloud is 100 hydrogen atoms per cubic cm and the radius of the cloud is 0.46 parsecs, the cloud cont ...
Unit 1
... clocks more distant • The warping of space has been demonstrated many times, including by observations of the orbit of Mercury • The slowing of clocks has been demonstrated as well! ...
... clocks more distant • The warping of space has been demonstrated many times, including by observations of the orbit of Mercury • The slowing of clocks has been demonstrated as well! ...
Characteristics of Stars
... This is 9.5 trillion km in 1 year Proxima Centauri is 4.2 ly away or 39,900,000,000,000 km or 24.8 trillion miles The circumference of the Earth is ~25,000 miles ...
... This is 9.5 trillion km in 1 year Proxima Centauri is 4.2 ly away or 39,900,000,000,000 km or 24.8 trillion miles The circumference of the Earth is ~25,000 miles ...
Stars and Universe Test Review - Garnet Valley School District
... 22. _________________________ a graph that plots a star’s temperature (x axis) verses its brightness (y-axis) 23. _________________________ irregular shaped galaxies 24. _________________________ the distance from one wave crest to another 25. _________________________ the apparent change in positio ...
... 22. _________________________ a graph that plots a star’s temperature (x axis) verses its brightness (y-axis) 23. _________________________ irregular shaped galaxies 24. _________________________ the distance from one wave crest to another 25. _________________________ the apparent change in positio ...
What is a Star?
... • The brightness a star would appear if it was set at a standard distance from Earth. – Astronomers calculate the stars apparent magnitude and it’s distance from Earth. – Then calculate the brightness if it were a standard distance from Earth. ...
... • The brightness a star would appear if it was set at a standard distance from Earth. – Astronomers calculate the stars apparent magnitude and it’s distance from Earth. – Then calculate the brightness if it were a standard distance from Earth. ...
PPT - University of Delaware
... massive star(s) in our Milky Way Galaxy 10 M_sun Bipolar Nebula enshrouds star(s) from 1840’s “Giant Eruption” Very close so lots of data Data predicts system is actually a binary system with one star ~90 M_sun and the other ~30 M_sun Think it is in last stages of life before big star undergoes a su ...
... massive star(s) in our Milky Way Galaxy 10 M_sun Bipolar Nebula enshrouds star(s) from 1840’s “Giant Eruption” Very close so lots of data Data predicts system is actually a binary system with one star ~90 M_sun and the other ~30 M_sun Think it is in last stages of life before big star undergoes a su ...
Theoretical Modeling of Massive Stars Mr. Russell University of Delaware
... massive star(s) in our Milky Way Galaxy 10 M_sun Bipolar Nebula enshrouds star(s) from 1840’s “Giant Eruption” Very close so lots of data Data predicts system is actually a binary system with one star ~90 M_sun and the other ~30 M_sun Think it is in last stages of life before big star undergoes a su ...
... massive star(s) in our Milky Way Galaxy 10 M_sun Bipolar Nebula enshrouds star(s) from 1840’s “Giant Eruption” Very close so lots of data Data predicts system is actually a binary system with one star ~90 M_sun and the other ~30 M_sun Think it is in last stages of life before big star undergoes a su ...
Gemini South telescope makes the case for multiple Earth
... called the Differential Speckle Survey Instrument (DSSI) to scrutinize the star TRAPPIST-1, confirming that the star is not a binary and that the presence of several Earth-sized planets is consistent with earlier observations. Previous observations of the star revealed dips in the star’s light, whic ...
... called the Differential Speckle Survey Instrument (DSSI) to scrutinize the star TRAPPIST-1, confirming that the star is not a binary and that the presence of several Earth-sized planets is consistent with earlier observations. Previous observations of the star revealed dips in the star’s light, whic ...
Society News - Bristol Astronomical Society
... resolved into individual stars. This image of M15 is from a drawing by Chris Lee. There are plenty of galaxies that lie within the boundaries of Pegasus but most are faint. The brightest of these is NGC 7331 which can be found approximately 4 degrees north of eta (η) Pegasi. You will need a reasonab ...
... resolved into individual stars. This image of M15 is from a drawing by Chris Lee. There are plenty of galaxies that lie within the boundaries of Pegasus but most are faint. The brightest of these is NGC 7331 which can be found approximately 4 degrees north of eta (η) Pegasi. You will need a reasonab ...
Document
... 3. Using Stellarium to help you find the names of the zodiacal constellations and their brightest stars, fill in the chart on the reverse side. The circle is the ecliptic going through the twelve constellations indicated by big arrows. Label each big arrow with the name of the constellation and try ...
... 3. Using Stellarium to help you find the names of the zodiacal constellations and their brightest stars, fill in the chart on the reverse side. The circle is the ecliptic going through the twelve constellations indicated by big arrows. Label each big arrow with the name of the constellation and try ...
Astrophysics
... point mass. Point mass singularity, and this breaks the laws of Physics. The strength of gravity inside a black hole is so massive that nothing can escape, not even light (which is why they are not visible). The perimeter at which light can/cannot escape is called the Event Horizon, but far away f ...
... point mass. Point mass singularity, and this breaks the laws of Physics. The strength of gravity inside a black hole is so massive that nothing can escape, not even light (which is why they are not visible). The perimeter at which light can/cannot escape is called the Event Horizon, but far away f ...
The Hidden Lives of Galaxies NSTA 2001
... • Under collapse, protons and electrons combine to form neutrons. • 10 Km across Black Hole (If mass of core > 5 x Solar) • Not even compacted neutrons can support weight of very massive stars. ...
... • Under collapse, protons and electrons combine to form neutrons. • 10 Km across Black Hole (If mass of core > 5 x Solar) • Not even compacted neutrons can support weight of very massive stars. ...
File
... popular name but smaller than a constellation 12. Explain precession and what it means in the future - slow movement of the axis of a spinning body around another axis due to a torque (such as gravitational influence) acting to change the direction of the first axis – it means that we will have a ne ...
... popular name but smaller than a constellation 12. Explain precession and what it means in the future - slow movement of the axis of a spinning body around another axis due to a torque (such as gravitational influence) acting to change the direction of the first axis – it means that we will have a ne ...
the life cycle of stars
... • When shrinks – atmosphere grows large and cools to a red giant or red supergiant • In 5 billion years the sun will become a red giant ...
... • When shrinks – atmosphere grows large and cools to a red giant or red supergiant • In 5 billion years the sun will become a red giant ...
Sky Watching Talk
... of constellations closest to the Ecliptic (Sun’s yearly path across the sky) Correspond to Horoscope “Signs” –Astrology used to make predictions (not science!) Useful ...
... of constellations closest to the Ecliptic (Sun’s yearly path across the sky) Correspond to Horoscope “Signs” –Astrology used to make predictions (not science!) Useful ...
Unit Two Worksheet – Astronomy
... Used to determine the distance from the earth to a star based on the shift in the apparent position of the star when viewed from different angles How bright a star appears to be from Earth A mass of gases that gives off enormous amounts of energy in the form of light and heat Very large, cool, brigh ...
... Used to determine the distance from the earth to a star based on the shift in the apparent position of the star when viewed from different angles How bright a star appears to be from Earth A mass of gases that gives off enormous amounts of energy in the form of light and heat Very large, cool, brigh ...
The Life Cycle of a star
... • A supernova can light up the sky for weeks. • The temperature in one can reach 1,000,000,000 °C. • The supernova then either becomes a neutron star or a black hole. ...
... • A supernova can light up the sky for weeks. • The temperature in one can reach 1,000,000,000 °C. • The supernova then either becomes a neutron star or a black hole. ...
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.