8.1 Stars
... neutrons only about 15 km across, it is called a neutron star. Neutron stars are made of the densest material known ...
... neutrons only about 15 km across, it is called a neutron star. Neutron stars are made of the densest material known ...
Lecture 15, PPT version
... At their maximum brightness, supernovae are as bright as an entire galaxy. ...
... At their maximum brightness, supernovae are as bright as an entire galaxy. ...
Chapter19
... take very long for someone to volunteer that I should make the gas hotter. I push one car toward the other at greater speed and hear a click as the two cars bang into one another (before being pushed apart). I finish by asking what would happen if the magnets were stronger, simulating nuclei of grea ...
... take very long for someone to volunteer that I should make the gas hotter. I push one car toward the other at greater speed and hear a click as the two cars bang into one another (before being pushed apart). I finish by asking what would happen if the magnets were stronger, simulating nuclei of grea ...
The Rigel Star - Emmi
... • Rigel is the ankle in the constellation Orion, a hunter from the Greek myths. • Orion was a great hunter and honest man. Because of this, he became the companion of Artemis, goddess of the hunt. This made Artemis’ twin, Apollo, jealous and he sent an enormous scorpion to sting Orion. Artemis was a ...
... • Rigel is the ankle in the constellation Orion, a hunter from the Greek myths. • Orion was a great hunter and honest man. Because of this, he became the companion of Artemis, goddess of the hunt. This made Artemis’ twin, Apollo, jealous and he sent an enormous scorpion to sting Orion. Artemis was a ...
presentation source
... core detonates star - Supernova! • Shines as brightly as galaxy for a few days! GENS4001 1999-X1 ...
... core detonates star - Supernova! • Shines as brightly as galaxy for a few days! GENS4001 1999-X1 ...
March 2010 - Pomona Valley Amateur Astronomers
... What's Up? Aliens From A Nearby Galaxy? In science fiction stories, aliens often proclaim that they "come from a nearby galaxy." For astronomers this seems to be a joke, the close Sagittarius Dwarf Galaxy (NGC 6822) is a million light years away. That's a long was for any alien to travel. This teles ...
... What's Up? Aliens From A Nearby Galaxy? In science fiction stories, aliens often proclaim that they "come from a nearby galaxy." For astronomers this seems to be a joke, the close Sagittarius Dwarf Galaxy (NGC 6822) is a million light years away. That's a long was for any alien to travel. This teles ...
Document
... • Parallax refers to the apparent change in the position of a star in the sky. • Measurement is based on the triangle formed by the Sun, Earth and star. The greater the parallax angle, the closer the star is to Earth. • This method cannot be used for a star more than 100 light-years ...
... • Parallax refers to the apparent change in the position of a star in the sky. • Measurement is based on the triangle formed by the Sun, Earth and star. The greater the parallax angle, the closer the star is to Earth. • This method cannot be used for a star more than 100 light-years ...
AY1 Homework for Quiz 2: Spring 2017
... ___ A. It will have become slightly more massive than the Sun is now because lightweight hydrogen has been converted into heavier Helium ___ B. It will be enriched in helium compared to the Sun ___ ...
... ___ A. It will have become slightly more massive than the Sun is now because lightweight hydrogen has been converted into heavier Helium ___ B. It will be enriched in helium compared to the Sun ___ ...
Click here to the PowerPoint
... compare the processes of nuclear fusion, the process responsible for star formation and nuclear fission, the process of large unstable nuclei/atoms breaking down into smaller atoms. ...
... compare the processes of nuclear fusion, the process responsible for star formation and nuclear fission, the process of large unstable nuclei/atoms breaking down into smaller atoms. ...
Astronomy Toolkit
... • Hipparcos classified the stars visible to the naked eye into six different brightness classes called magnitudes • Hipparcos chose to categorize the brightest stars as magnitude 1, and the faintest as magnitude 6 (smaller numbers are brighter stars) • The magnitude system of Hipparcos is still in u ...
... • Hipparcos classified the stars visible to the naked eye into six different brightness classes called magnitudes • Hipparcos chose to categorize the brightest stars as magnitude 1, and the faintest as magnitude 6 (smaller numbers are brighter stars) • The magnitude system of Hipparcos is still in u ...
Supernovae March 23 − Supernova 1987A
... • Gas expelled in 1054AD, still glowing • Other SN • 1572 Tycho • 1604 Kepler ...
... • Gas expelled in 1054AD, still glowing • Other SN • 1572 Tycho • 1604 Kepler ...
of a Star
... The flux received from the light is proportional to its intrinsic brightness or luminosity (L) and inversely proportional to the square of the distance (d): ...
... The flux received from the light is proportional to its intrinsic brightness or luminosity (L) and inversely proportional to the square of the distance (d): ...
Neutron Stars
... Upper mass limit of Neutron Stars • In Neutron stars the gravity is balanced by two forces. – Degenerate neutron pressure – Strong nuclear force. ...
... Upper mass limit of Neutron Stars • In Neutron stars the gravity is balanced by two forces. – Degenerate neutron pressure – Strong nuclear force. ...
An Introduction to Astronomy and Cosmology
... inserted to bring solar and atomic time back in step. ...
... inserted to bring solar and atomic time back in step. ...
ppt
... of quark star within the bag model. ・ Assuming that RX J1856.5-3754 is a pure quark star, we have derived an upper limit on its mass. ...
... of quark star within the bag model. ・ Assuming that RX J1856.5-3754 is a pure quark star, we have derived an upper limit on its mass. ...
Night Sky Checklist April–May–June Unaided Eye Astronomy
... The Big Dipper is only a part of the large constellation Ursa Major, the Larger Bear, and seems to be known as a dipper only in North America and parts of Africa. This prominent group has had many other names in other parts of the world and in other times in history. The stars at the front of the Di ...
... The Big Dipper is only a part of the large constellation Ursa Major, the Larger Bear, and seems to be known as a dipper only in North America and parts of Africa. This prominent group has had many other names in other parts of the world and in other times in history. The stars at the front of the Di ...
The Life Cycle of Stars
... Telescope pictures of a developing galactic nebula in our Milky Way Galaxy called NGC 3603 ...
... Telescope pictures of a developing galactic nebula in our Milky Way Galaxy called NGC 3603 ...
Space Science Unit
... of the star to help astronomers decide which phase of the star’s life cycle the star is in and other important information about the star. • Most stars are what we consider main sequence (including our sun). They make up 90% of the stars in our sky. These stars are the diagonal strip running through ...
... of the star to help astronomers decide which phase of the star’s life cycle the star is in and other important information about the star. • Most stars are what we consider main sequence (including our sun). They make up 90% of the stars in our sky. These stars are the diagonal strip running through ...
Star of Bethlehem
In Christian tradition, the Star of Bethlehem, also called the Christmas Star, revealed the birth of Jesus to the Biblical Magi, and later led them to Bethlehem. The star appears only in the nativity story of the Gospel of Matthew, where astrologers from the east are inspired by the star to travel to Jerusalem. There they meet King Herod of Judea, and ask where the king of the Jews had been born. Herod, following a verse from the Book of Micah interpreted as a prophecy, directs them to Bethlehem, to the south of Jerusalem. The star leads them to Jesus' home in the town, where they worship him and give him gifts. The wise men are then given a divine warning not to return to Herod so they return home by a different route.Many Christians see the star as a miraculous sign to mark the birth of the Christ (or messiah). Some theologians claimed that the star fulfilled a prophecy, known as the Star Prophecy. Astronomers have made several attempts to link the star to unusual astronomical events, such as a conjunction of Jupiter and Saturn, a comet or a supernova.Many modern scholars do not consider the story to be describing a historical event but a pious fiction created by the author of the Gospel of Matthew.The subject is a favorite at planetarium shows during the Christmas season, although the Biblical account describes Jesus with a broader Greek word, which can mean either ""infant"" or ""child"" (paidon), rather than the more specific word for infant (brephos), possibly implying that some time has passed since the birth. The visit is traditionally celebrated on Epiphany (January 6) in Western Christianity.