Nebulas - WLWV Staff Blogs
... form between stars. They form in regions where gas, dust, and other materials clump together to create larger masses, which then gather other material until they become big enough to be known as stars. ...
... form between stars. They form in regions where gas, dust, and other materials clump together to create larger masses, which then gather other material until they become big enough to be known as stars. ...
“The Southern Cross”
... Aristotle’s world-view of a universe in which everything had its natural place with a changing Earth surrounded by eternal, perfect and incorruptible heavens was not seriously challenged for almost another two millennia when, in the 16th century, Copernicus contested the established acceptance of th ...
... Aristotle’s world-view of a universe in which everything had its natural place with a changing Earth surrounded by eternal, perfect and incorruptible heavens was not seriously challenged for almost another two millennia when, in the 16th century, Copernicus contested the established acceptance of th ...
CO 2 Cycle
... carried sediment in the past several years…The atmosphere on Mars is so thin that liquid water cannot persist at the surface. However, researchers propose that water could remain liquid long enough, after breaking out from an underground source, to carry debris before totally evaporating and freezin ...
... carried sediment in the past several years…The atmosphere on Mars is so thin that liquid water cannot persist at the surface. However, researchers propose that water could remain liquid long enough, after breaking out from an underground source, to carry debris before totally evaporating and freezin ...
STEM for TY Teachers
... ! Variable Stars - Stars that Vary in Luminosity: Many stars, even the Sun, can vary in luminosity. Some change their light output by a very significant amount in a regular way and can therefore be recognized at very great distances. These can be used as “standard candles” to estimate distances. ...
... ! Variable Stars - Stars that Vary in Luminosity: Many stars, even the Sun, can vary in luminosity. Some change their light output by a very significant amount in a regular way and can therefore be recognized at very great distances. These can be used as “standard candles” to estimate distances. ...
Binary Star - Armagh Observatory
... Eclipsing Binary: An eclipsing binary is two stars that appear to be a single star varying in brightness. The variation in brightness is due to the stars periodically obscuring or enhancing one another. Such binary star systems happen to be tilted (with respect to us) so that their orbital plane ...
... Eclipsing Binary: An eclipsing binary is two stars that appear to be a single star varying in brightness. The variation in brightness is due to the stars periodically obscuring or enhancing one another. Such binary star systems happen to be tilted (with respect to us) so that their orbital plane ...
Lesson one Time line Powerpoint
... spheres in uniform (constant speed) and perfect, circular motions and earth was the center of motion (Geocentric). ...
... spheres in uniform (constant speed) and perfect, circular motions and earth was the center of motion (Geocentric). ...
Unit 8 Chapter 30
... It is believed that stars probably formed in similar ways. The theory is that a cloud of dust (a nebula) contracts with most of the material going to the center to form a star. The dust is mainly Hydrogen (99%) with other elements and compounds like silicon carbide, graphite diamonds and nitrogen. T ...
... It is believed that stars probably formed in similar ways. The theory is that a cloud of dust (a nebula) contracts with most of the material going to the center to form a star. The dust is mainly Hydrogen (99%) with other elements and compounds like silicon carbide, graphite diamonds and nitrogen. T ...
Death of Low Mass Stars 8 Solar Masses or less
... repulsion) keeps gravity from compressing it further. Called Electron Degeneracy • The black dwarf will continue to exist at temps close to absolute zero forever…. ...
... repulsion) keeps gravity from compressing it further. Called Electron Degeneracy • The black dwarf will continue to exist at temps close to absolute zero forever…. ...
Astronomy Activity: The Life-Line of the Stars
... The brightness that a star has as seen from the Earth is called the apparent brightness . Stars which are very bright are called magnitude 1 stars . The next brightest are magnitude 2 stars. Then comes magnitude 3, 4, 5, and down to the very faintest stars visible with the naked eye, magnitude 6 sta ...
... The brightness that a star has as seen from the Earth is called the apparent brightness . Stars which are very bright are called magnitude 1 stars . The next brightest are magnitude 2 stars. Then comes magnitude 3, 4, 5, and down to the very faintest stars visible with the naked eye, magnitude 6 sta ...
Patterns in the Night Sky
... A star map is a map of the night sky that shows the relative positions of the stars in a particular part of the sky (Figure 4). Some star maps show only those objects that can be seen with the unaided eye, while others show objects that can only be viewed using a telescope or other instrument. A sta ...
... A star map is a map of the night sky that shows the relative positions of the stars in a particular part of the sky (Figure 4). Some star maps show only those objects that can be seen with the unaided eye, while others show objects that can only be viewed using a telescope or other instrument. A sta ...
Astronomy and Space articles
... by first looking for the three stars in a row in the constellation of Orion. These form Orion's belt, but they are also well known as the base of 'The Saucepan', formed from some of the stars of Orion. If you extend a line from the belt stars upwards and to the right, you will come across Sirius. Of ...
... by first looking for the three stars in a row in the constellation of Orion. These form Orion's belt, but they are also well known as the base of 'The Saucepan', formed from some of the stars of Orion. If you extend a line from the belt stars upwards and to the right, you will come across Sirius. Of ...
transparencies
... E = M (ΔR/R)2 M mass in quadrupole motion For each mini-collapses ΔR/R ~ 2 – 3 × 10-3 E ~ 0.5 -1× 10-5 Solar masses (It can be one order of magnitude larger in more realistic calculations ) Four order of magnitude larger respect to SGR Energy scale of hadronic physics vs atomic nuclear physics ...
... E = M (ΔR/R)2 M mass in quadrupole motion For each mini-collapses ΔR/R ~ 2 – 3 × 10-3 E ~ 0.5 -1× 10-5 Solar masses (It can be one order of magnitude larger in more realistic calculations ) Four order of magnitude larger respect to SGR Energy scale of hadronic physics vs atomic nuclear physics ...
Measuring The Parallax of Barnard's Star
... established rate of proper motion of 10.37 arcseconds per year. And, the velocity in arcseconds per year times the distance in parsecs gives the velocity in astronomical units (au) per year. Using our derived numbers we get that the projected velocity is 19.3 au/yr. A natural question to ask is: why ...
... established rate of proper motion of 10.37 arcseconds per year. And, the velocity in arcseconds per year times the distance in parsecs gives the velocity in astronomical units (au) per year. Using our derived numbers we get that the projected velocity is 19.3 au/yr. A natural question to ask is: why ...
Introduction to Astronomy
... The weak nuclear force can change one type of subatomic particle into another in some situations such as radioactive decay, and the generation of energy in stars. The energy resulting from thermonuclear fusion is distributed in several ways: kinetic energy of 4He and the two "recycled" protons: 91% ...
... The weak nuclear force can change one type of subatomic particle into another in some situations such as radioactive decay, and the generation of energy in stars. The energy resulting from thermonuclear fusion is distributed in several ways: kinetic energy of 4He and the two "recycled" protons: 91% ...
the star
... period of about one million years. Proxima Centauri is 4.22 light years from the Earth (now) and about 0.24 light years from Alpha-Centauri A and B. • Alpha-Centauri A and B – a double star system with a period of about 80 years. Component A is a near twin of the sun (Type G2). Component B is a lit ...
... period of about one million years. Proxima Centauri is 4.22 light years from the Earth (now) and about 0.24 light years from Alpha-Centauri A and B. • Alpha-Centauri A and B – a double star system with a period of about 80 years. Component A is a near twin of the sun (Type G2). Component B is a lit ...
Spectra of Star Clusters
... stars in many phases of life, just as we might study how humans age by observing the humans living in a village at one time. • What two basic physical properties do astronomers use to classify stars? • Stars are classified by their luminosity and surface temperature. These properties, in turn, d ...
... stars in many phases of life, just as we might study how humans age by observing the humans living in a village at one time. • What two basic physical properties do astronomers use to classify stars? • Stars are classified by their luminosity and surface temperature. These properties, in turn, d ...
Hipparcos
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993. It was the first space experiment devoted to precision astrometry, the accurate measurement of the positions of celestial objects on the sky. This permitted the accurate determination of proper motions and parallaxes of stars, allowing a determination of their distance and tangential velocity. When combined with radial-velocity measurements from spectroscopy, this pinpointed all six quantities needed to determine the motion of stars. The resulting Hipparcos Catalogue, a high-precision catalogue of more than 118,200 stars, was published in 1997. The lower-precision Tycho Catalogue of more than a million stars was published at the same time, while the enhanced Tycho-2 Catalogue of 2.5 million stars was published in 2000. Hipparcos ' follow-up mission, Gaia, was launched in 2013.The word ""Hipparcos"" is an acronym for High precision parallax collecting satellite and also a reference to the ancient Greek astronomer Hipparchus of Nicaea, who is noted for applications of trigonometry to astronomy and his discovery of the precession of the equinoxes.