Day-7
... Stellar Radii and Planetary Orbital Semi-Major Axis (A.U.) The Habitable Zone (HZ) in green is defined here (and often) as the distance from a star where liquid water is expected to exist on the planets surface (Kasting, Whitmire, and Reynolds 1993). ...
... Stellar Radii and Planetary Orbital Semi-Major Axis (A.U.) The Habitable Zone (HZ) in green is defined here (and often) as the distance from a star where liquid water is expected to exist on the planets surface (Kasting, Whitmire, and Reynolds 1993). ...
A small mass difference between Hydrogen and Helium The
... The Einstein Energy-Mass equivalence relation E=mc2 c=speed of light You get a lot of bang for the buck: 6.3E+14 J/kg. This gives plenty of energy to power the Sun for 4.5 billion years plus ...
... The Einstein Energy-Mass equivalence relation E=mc2 c=speed of light You get a lot of bang for the buck: 6.3E+14 J/kg. This gives plenty of energy to power the Sun for 4.5 billion years plus ...
PDF version (two pages, including the full text)
... At about 40 times the diameter of the sun and 400 times as bright, Alphard is one of the ‘bright giants’ in our neighborhood. But our ‘neighborhood’ is rather large. Alphard is 11 million times as far away from us as our own sun – so it looks a lot dimmer to us! To the south of Sirius, and nearly ov ...
... At about 40 times the diameter of the sun and 400 times as bright, Alphard is one of the ‘bright giants’ in our neighborhood. But our ‘neighborhood’ is rather large. Alphard is 11 million times as far away from us as our own sun – so it looks a lot dimmer to us! To the south of Sirius, and nearly ov ...
The hierarchical structure of the Universe (go from little to large)
... - Everything you see is part of the Galaxy • The glow of the Milky Way • Stars • Star clusters (open clusters and globular clusters) • Planetary nebulae (dying stars) • Supernova remnants (stars that blew up) ...
... - Everything you see is part of the Galaxy • The glow of the Milky Way • Stars • Star clusters (open clusters and globular clusters) • Planetary nebulae (dying stars) • Supernova remnants (stars that blew up) ...
Apparent brightness
... Distinguish between luminosity and brightness and explain how stellar luminosity is determined. Explain how stars are classified according to their colors, surface temperatures and spectral characteristics, and tell why such a classification is useful. State how an H-R diagram is constructed, ...
... Distinguish between luminosity and brightness and explain how stellar luminosity is determined. Explain how stars are classified according to their colors, surface temperatures and spectral characteristics, and tell why such a classification is useful. State how an H-R diagram is constructed, ...
The night sky in October and November
... Messier. M31 is a Messier object. Time-elapse photos through a large telescope reveal it as a spiral galaxy about four times the width of the full moon. It is the most distant object you can see without optical aids. The stars that make up the constellation of Andromeda are in the Milky Way. That’s ...
... Messier. M31 is a Messier object. Time-elapse photos through a large telescope reveal it as a spiral galaxy about four times the width of the full moon. It is the most distant object you can see without optical aids. The stars that make up the constellation of Andromeda are in the Milky Way. That’s ...
Slide 1
... Know the names of the planets! They orbit in ellipses with the sun at one foci Inner planets small and rocky Outer planets large and mainly gas Outer planets are much further from the sun Asteroid belt between Mars and Jupiter ...
... Know the names of the planets! They orbit in ellipses with the sun at one foci Inner planets small and rocky Outer planets large and mainly gas Outer planets are much further from the sun Asteroid belt between Mars and Jupiter ...
Slide 1
... But the solution to this is even more confusing. If we make a graph of how fast stars in the arms move compared to distance, we get line “B”. The fact that all the stars go the same speed explains why the spiral arms don’t twist up, but it doesn’t make sense. According to physics, the speeds should ...
... But the solution to this is even more confusing. If we make a graph of how fast stars in the arms move compared to distance, we get line “B”. The fact that all the stars go the same speed explains why the spiral arms don’t twist up, but it doesn’t make sense. According to physics, the speeds should ...
Ch. 25 Properties of Stars
... The more negative, the brighter and the more positive, the dimmer Astronomers estimate that there are 200-400 billion stars in our Milky Way Galaxy, but we can only see about 2,500 visible to the naked eye on Earth ...
... The more negative, the brighter and the more positive, the dimmer Astronomers estimate that there are 200-400 billion stars in our Milky Way Galaxy, but we can only see about 2,500 visible to the naked eye on Earth ...
Stars Study Guide KEY
... Spiral = central disk with arms that spiral outward, can be “bar” or “pinwheel”; Ellipse = round/flattened ball of stars; Irregular = does not fit the other two patterns; does not have a regular shape. ...
... Spiral = central disk with arms that spiral outward, can be “bar” or “pinwheel”; Ellipse = round/flattened ball of stars; Irregular = does not fit the other two patterns; does not have a regular shape. ...
Document
... • The earth was too big to rotate once a day. It would fly apart. • Stars did not show parallaxes during the year, which they must if the earth goes around the sun. This argument was conclusive for most people. The only way out: the stars must be very far away! ...
... • The earth was too big to rotate once a day. It would fly apart. • Stars did not show parallaxes during the year, which they must if the earth goes around the sun. This argument was conclusive for most people. The only way out: the stars must be very far away! ...
stars_2nd_edit
... years for massive stars to billions for smaller stars. Our Sun, which is of average mass, is predicted to live for about 10 billion years. By knowing the distance, mass, magnitude, and chemical composition of a star, we can determine approximately how old it is, when it was born, and when it will di ...
... years for massive stars to billions for smaller stars. Our Sun, which is of average mass, is predicted to live for about 10 billion years. By knowing the distance, mass, magnitude, and chemical composition of a star, we can determine approximately how old it is, when it was born, and when it will di ...
HERE - physicsisphun.org
... sun are 4.3ly away (6.09 x 1016m)! What are they??? •What does that mean about the light you see from them? ...
... sun are 4.3ly away (6.09 x 1016m)! What are they??? •What does that mean about the light you see from them? ...
3-Stars AM Adapted - vhs-ees-am
... dwarf; become a lump of coal in the sky when all its nuclear energy is gone ...
... dwarf; become a lump of coal in the sky when all its nuclear energy is gone ...
Stars_Galaxies_Introduction - Etiwanda E
... What is the source of light in a galaxy? – How is energy produced by the sun? – How are sunspots, prominences, and solar flares related? – Why is our sun considered to be an average star? – How does our sun differ from stars in binary systems? ...
... What is the source of light in a galaxy? – How is energy produced by the sun? – How are sunspots, prominences, and solar flares related? – Why is our sun considered to be an average star? – How does our sun differ from stars in binary systems? ...
Science Journals * 3-18-13
... and that the Sun is many thousands of times closer to the earth than any other star. ...
... and that the Sun is many thousands of times closer to the earth than any other star. ...
Starry Starry Night Vocabulary
... Star: A huge A self-luminous, gaseous celestial body which produces energy and whose size may be as small as the earth or larger than the earth’s orbit. The Sun is the closest star to Earth. Sun spots: Temporary phenomena on the photosphere of the Sun that appear visibly as dark spots compared to su ...
... Star: A huge A self-luminous, gaseous celestial body which produces energy and whose size may be as small as the earth or larger than the earth’s orbit. The Sun is the closest star to Earth. Sun spots: Temporary phenomena on the photosphere of the Sun that appear visibly as dark spots compared to su ...
Chapter 25 - Notes Super Size
... » Depending on the mass of the core, one of the _________________ will occur: 1.) _________________ Star- smaller cores will produce a dense core of neutrons about 20km in diameter. 2.) Black Hole- larger cores will collapse to a super dense _________________. The gravity near this mass is so strong ...
... » Depending on the mass of the core, one of the _________________ will occur: 1.) _________________ Star- smaller cores will produce a dense core of neutrons about 20km in diameter. 2.) Black Hole- larger cores will collapse to a super dense _________________. The gravity near this mass is so strong ...
Powerpoint of lecture 1
... E = gravitational energy of star, L = luminosity: tKH = GM2/LR ~ 3107 yr for Sun. But geology requires much longer timescale – only nuclear fuel provides this; nuclear binding energy releases up to ~1% of rest mass energy: EN ~ 0.01Mc2, so tN ~ 0.01Mc2/L ~ 1.5 1011 yr for Sun. Over-estimate, becau ...
... E = gravitational energy of star, L = luminosity: tKH = GM2/LR ~ 3107 yr for Sun. But geology requires much longer timescale – only nuclear fuel provides this; nuclear binding energy releases up to ~1% of rest mass energy: EN ~ 0.01Mc2, so tN ~ 0.01Mc2/L ~ 1.5 1011 yr for Sun. Over-estimate, becau ...
22 September: Starlight
... spectroscopy to stars • Continuous spectrum gives surface temperature (Wien’s Law) • Spectral lines give chemical composition, temperature (also), speed of rotation (How?) and other properties • Examples of stellar spectra…what can we say? ...
... spectroscopy to stars • Continuous spectrum gives surface temperature (Wien’s Law) • Spectral lines give chemical composition, temperature (also), speed of rotation (How?) and other properties • Examples of stellar spectra…what can we say? ...
Stellar kinematics
Stellar kinematics is the study of the movement of stars without needing to understand how they acquired their motion. This differs from stellar dynamics, which takes into account gravitational effects. The motion of a star relative to the Sun can provide useful information about the origin and age of a star, as well as the structure and evolution of the surrounding part of the Milky Way.In astronomy, it is widely accepted that most stars are born within molecular clouds known as stellar nurseries. The stars formed within such a cloud compose open clusters containing dozens to thousands of members. These clusters dissociate over time. Stars that separate themselves from the cluster's core are designated as members of the cluster's stellar association. If the remnant later drifts through the Milky Way as a coherent assemblage, then it is termed a moving group.