Stars - TeacherWeb
... Life Cycle of Stars • The matter inside the star will be compressed so tightly that its atoms are compacted into a dense shell of neutrons. If the remaining mass of the star is more than about three times that of the Sun, it will collapse so completely that it will literally disappear from the univ ...
... Life Cycle of Stars • The matter inside the star will be compressed so tightly that its atoms are compacted into a dense shell of neutrons. If the remaining mass of the star is more than about three times that of the Sun, it will collapse so completely that it will literally disappear from the univ ...
The Planets
... Modeling Distance in the Solar System Description: These two activities present complementary ways of discussing the distances between planets in the Solar System. The first activity requires a large outdoor space (1030 yards) while the second activity can be accomplished in less space (37 yards). ...
... Modeling Distance in the Solar System Description: These two activities present complementary ways of discussing the distances between planets in the Solar System. The first activity requires a large outdoor space (1030 yards) while the second activity can be accomplished in less space (37 yards). ...
Edited_Lecture_Transcripts_05_06 - 05 - astronomo
... Sciences is a huge field that I wouldn't be qualified to teach even if I had the time, but let's do a quick pass and see what we can say about Earth as a planet. So first, first thing you see when you look at Earth. Is that, most of its surface is covered with liquid water. As we know that means, th ...
... Sciences is a huge field that I wouldn't be qualified to teach even if I had the time, but let's do a quick pass and see what we can say about Earth as a planet. So first, first thing you see when you look at Earth. Is that, most of its surface is covered with liquid water. As we know that means, th ...
models
... (one arcminute) naked eye measurements ever made of planetary positions. Still could not detect stellar parallax, and thus still thought Earth must be at center of solar system (but recognized that other planets go around Sun). ...
... (one arcminute) naked eye measurements ever made of planetary positions. Still could not detect stellar parallax, and thus still thought Earth must be at center of solar system (but recognized that other planets go around Sun). ...
Stars Study Guide KEY
... *7. Which stars live the longest, high-mass or low-mass? Low Mass Stars live longer. Why? They have less self-gravity which means they burn through their fuel slower. 8. What will happen to our star, the Sun, at the end of its life? The sun will expand in the Red Giant phase, then will release its o ...
... *7. Which stars live the longest, high-mass or low-mass? Low Mass Stars live longer. Why? They have less self-gravity which means they burn through their fuel slower. 8. What will happen to our star, the Sun, at the end of its life? The sun will expand in the Red Giant phase, then will release its o ...
tremaine_lecture_1
... unstable, and they collide 3. the Earth’s orbit is unstable and it falls into the Sun 4. the Earth’s orbit is unstable, and it is ejected into interstellar space ...
... unstable, and they collide 3. the Earth’s orbit is unstable and it falls into the Sun 4. the Earth’s orbit is unstable, and it is ejected into interstellar space ...
Classification and structure of galaxies
... We can see: • Stars and star clusters – microwaves generated by water from H II regions (called the MASER technique) traces the Milky Way’s spiral arms • Nebulae – infrared light (detected by the Spitzer Space Telescope) shows the outline of the heat generated by the bar • Other galaxies (analogous ...
... We can see: • Stars and star clusters – microwaves generated by water from H II regions (called the MASER technique) traces the Milky Way’s spiral arms • Nebulae – infrared light (detected by the Spitzer Space Telescope) shows the outline of the heat generated by the bar • Other galaxies (analogous ...
star
... • The luminosity of a star, measured on an absolute magnitude scale, depends on the star’s temperature and size, not its distance from Earth. ...
... • The luminosity of a star, measured on an absolute magnitude scale, depends on the star’s temperature and size, not its distance from Earth. ...
Our Place in the Cosmos Elective Course Autumn 2006
... Distance to the Sun • For a nearly-circular orbit, radius is circumference divided by 2: 150 million km • This distance, the average distance between the Earth and Sun is known as one astronomical unit (AU) • Modern measurements use radar signals bounced off Venus • The AU provides the basis for t ...
... Distance to the Sun • For a nearly-circular orbit, radius is circumference divided by 2: 150 million km • This distance, the average distance between the Earth and Sun is known as one astronomical unit (AU) • Modern measurements use radar signals bounced off Venus • The AU provides the basis for t ...
Habitable Zones around Evolved Stars
... Factors determining the location of the habitable zone in evolved stars • L changes dramatically as a star evolves beyond the main sequence • ap is altered by changing M* or in extreme cases by tidal or gas drag • The albedoratio depends on planetary atmosphere, surface properties, => and the stell ...
... Factors determining the location of the habitable zone in evolved stars • L changes dramatically as a star evolves beyond the main sequence • ap is altered by changing M* or in extreme cases by tidal or gas drag • The albedoratio depends on planetary atmosphere, surface properties, => and the stell ...
all Solar System objects have the same composition
... Hypervelocity impacts: • Impact velocity >> speed of sound in the target and in the projectile – Minimal impact velocity ~ escape velocity – How to estimate a typical / maximal impact velocity? ...
... Hypervelocity impacts: • Impact velocity >> speed of sound in the target and in the projectile – Minimal impact velocity ~ escape velocity – How to estimate a typical / maximal impact velocity? ...
Instructor`s Guide
... by the scientific establishment; sometimes spring from unexpected findings; and usually grow slowly, through contributions from many investigators. The Physical Setting: The Universe • The stars differ from each other in size, temperature, and age, but they appear to be made up of the same elements ...
... by the scientific establishment; sometimes spring from unexpected findings; and usually grow slowly, through contributions from many investigators. The Physical Setting: The Universe • The stars differ from each other in size, temperature, and age, but they appear to be made up of the same elements ...
PDF only - at www.arxiv.org.
... Sleep, 2002; Jones et al., 2001), to simulate the orbital motion of Earth-mass planets over one billion years, in a sample of such systems. If a terrestrial planet could exist in a stable orbit for this length of time it is likely to be able to exist there for the duration of that star’s main sequen ...
... Sleep, 2002; Jones et al., 2001), to simulate the orbital motion of Earth-mass planets over one billion years, in a sample of such systems. If a terrestrial planet could exist in a stable orbit for this length of time it is likely to be able to exist there for the duration of that star’s main sequen ...
StarWalkKiDS manual en
... occurs when it first becomes visible above the eastern horizon after a period of time when it had not been visible. ...
... occurs when it first becomes visible above the eastern horizon after a period of time when it had not been visible. ...
Opposition of Saturn - Hong Kong Observatory
... Figure 1 Relative positions of a superior planet, the Earth and the Sun during opposition and conjunction of the superior planet. Opposition of Saturn Saturn is the second largest planet in the Solar System and the sixth planet away from the Sun. Saturn is characterized by the Saturn ring, wh ...
... Figure 1 Relative positions of a superior planet, the Earth and the Sun during opposition and conjunction of the superior planet. Opposition of Saturn Saturn is the second largest planet in the Solar System and the sixth planet away from the Sun. Saturn is characterized by the Saturn ring, wh ...
Rare Earth hypothesis
In planetary astronomy and astrobiology, the Rare Earth Hypothesis argues that the origin of life and the evolution of biological complexity such as sexually reproducing, multicellular organisms on Earth (and, subsequently, human intelligence) required an improbable combination of astrophysical and geological events and circumstances. The hypothesis argues that complex extraterrestrial life is a very improbable phenomenon and likely to be extremely rare. The term ""Rare Earth"" originates from Rare Earth: Why Complex Life Is Uncommon in the Universe (2000), a book by Peter Ward, a geologist and paleontologist, and Donald E. Brownlee, an astronomer and astrobiologist, both faculty members at the University of Washington.An alternative view point was argued by Carl Sagan and Frank Drake, among others. It holds that Earth is a typical rocky planet in a typical planetary system, located in a non-exceptional region of a common barred-spiral galaxy. Given the principle of mediocrity (also called the Copernican principle), it is probable that the universe teems with complex life. Ward and Brownlee argue to the contrary: that planets, planetary systems, and galactic regions that are as friendly to complex life as are the Earth, the Solar System, and our region of the Milky Way are very rare.