Stars - TeacherWeb
... • any object 15 to 75 times the mass of Jupiter • the object would not have been able to sustain fusion like a regular star - called "failed stars" • all are parts of a binary system. (two stars orbit around one another) • possible that brown dwarfs represent a lot of the mass in the universe ...
... • any object 15 to 75 times the mass of Jupiter • the object would not have been able to sustain fusion like a regular star - called "failed stars" • all are parts of a binary system. (two stars orbit around one another) • possible that brown dwarfs represent a lot of the mass in the universe ...
HNRS 227 Lecture #2 Chapters 2 and 3
... Young star clusters give insight into star formation and evolution Newborn stars may form an open or galactic cluster Stars are held together in such a cluster by gravity Occasionally a star moving more rapidly than average will escape, or leave the cluster A stellar association is a group ...
... Young star clusters give insight into star formation and evolution Newborn stars may form an open or galactic cluster Stars are held together in such a cluster by gravity Occasionally a star moving more rapidly than average will escape, or leave the cluster A stellar association is a group ...
wk02noQ
... 3. The Sun orbits in the Milky Way The sun (and nearby stars) orbit the center of the Milky Way once per 230,000,000 years. How do we know? (motion of other stars in the Milky Way wrt the Sun; careful study of stellar positions over time) ...
... 3. The Sun orbits in the Milky Way The sun (and nearby stars) orbit the center of the Milky Way once per 230,000,000 years. How do we know? (motion of other stars in the Milky Way wrt the Sun; careful study of stellar positions over time) ...
Lecture 21
... This was a big surprise • There are jovian mass planets in orbits around stars, but closer than the distance at which Mercury orbits the Sun • These objects are called 'hot Jupiters' because their equilibrium temperatures will be high. • Conventionally, many (but not all) astronomers believe that t ...
... This was a big surprise • There are jovian mass planets in orbits around stars, but closer than the distance at which Mercury orbits the Sun • These objects are called 'hot Jupiters' because their equilibrium temperatures will be high. • Conventionally, many (but not all) astronomers believe that t ...
PowerPoint Presentation - Small Bodies in the Solar System
... > 200 asteroids larger than 60 miles (100 kilometers) in diameter. > 750,000 asteroids larger than three-fifths of a mile (1 km) in diameter and millions of smaller ones. ...
... > 200 asteroids larger than 60 miles (100 kilometers) in diameter. > 750,000 asteroids larger than three-fifths of a mile (1 km) in diameter and millions of smaller ones. ...
Chap 2 Lecture(1)
... The Solar System, Sun, and Earth Our solar system is located in the milky way galaxy, a flattened disk shaped mass estimated to contain more than 400 billion stars. Our solar system is more than halfway out from the galatic centre in one of the milky way’s spiral arms – the Orion arm. The sun and t ...
... The Solar System, Sun, and Earth Our solar system is located in the milky way galaxy, a flattened disk shaped mass estimated to contain more than 400 billion stars. Our solar system is more than halfway out from the galatic centre in one of the milky way’s spiral arms – the Orion arm. The sun and t ...
Cosmos & Contact - Access Research Network
... • Right number of stars in system – Zero – pretty cold! – Two or more – unstable orbits if planets at all. ...
... • Right number of stars in system – Zero – pretty cold! – Two or more – unstable orbits if planets at all. ...
Celestial Objects
... Precession 6 – The Earth behaves somewhat like a spinning top, causing the axis of rotation to trace out a circle. This slow conical motion of the Earth’s axis of rotation is called precession, and is due to the gravitational effects of the Sun and Moon on the Earth’s equatorial bulge. Precession sl ...
... Precession 6 – The Earth behaves somewhat like a spinning top, causing the axis of rotation to trace out a circle. This slow conical motion of the Earth’s axis of rotation is called precession, and is due to the gravitational effects of the Sun and Moon on the Earth’s equatorial bulge. Precession sl ...
Intro To The Solar System
... Earth has diameter 0.3 mm. Sun: ~ size of a small plum. Mercury, Venus, Earth, Mars: ~ size of a grain of salt. Jupiter: ~ size of an apple seed. Saturn: ~ slightly smaller than Jupiter’s “apple seed”. ...
... Earth has diameter 0.3 mm. Sun: ~ size of a small plum. Mercury, Venus, Earth, Mars: ~ size of a grain of salt. Jupiter: ~ size of an apple seed. Saturn: ~ slightly smaller than Jupiter’s “apple seed”. ...
Integrative Studies 410 Our Place in the Universe
... • Stars thinned out very fast at right angles to Milky Way • In the plane of the Milky Way the thinning was slower and depended upon the direction in which he looked • Flaws: – Observations made only in visible spectrum – Did not take into account absorption by interstellar gas and dust ...
... • Stars thinned out very fast at right angles to Milky Way • In the plane of the Milky Way the thinning was slower and depended upon the direction in which he looked • Flaws: – Observations made only in visible spectrum – Did not take into account absorption by interstellar gas and dust ...
astrofe –astronomy ofe
... Venus is a small, rocky planet blanketed in a thick layer of yellowish clouds. These clouds are not made of water (like the ones here on Earth). Instead, they are formed from a poison called sulfuric acid. ~ Venus' surface is very hot - about 400 degrees Celsius! ~ Even though Venus is very cloudy, ...
... Venus is a small, rocky planet blanketed in a thick layer of yellowish clouds. These clouds are not made of water (like the ones here on Earth). Instead, they are formed from a poison called sulfuric acid. ~ Venus' surface is very hot - about 400 degrees Celsius! ~ Even though Venus is very cloudy, ...
Chapter 1
... Copyright (c) The McGraw-Hill Companies, Inc. Permission required for reproduction or display. ...
... Copyright (c) The McGraw-Hill Companies, Inc. Permission required for reproduction or display. ...
Lecture 3: The age of the elements, and the formation of the earth
... origins of meteorites. Evidence points to the asteroid belt between Mars and Jupiter. This makes some sense, as the asteroid belt is thought to be the remnant of a failed planet: either one that hasn't formed or one that has broken up. There are two basic types of meteorites: stony and iron. About 9 ...
... origins of meteorites. Evidence points to the asteroid belt between Mars and Jupiter. This makes some sense, as the asteroid belt is thought to be the remnant of a failed planet: either one that hasn't formed or one that has broken up. There are two basic types of meteorites: stony and iron. About 9 ...
Learning About Stars
... planets take less time than Earth to travel around the Sun, while some planets take longer. But this is different than the stars… ...
... planets take less time than Earth to travel around the Sun, while some planets take longer. But this is different than the stars… ...
In Retrospect: Kepler`s Astronomia Nova
... enough to predict the transits of the inner planets Mercury and Venus across the Sun’s disc, which were first observed in 1631 and 1639, respectively. Thus it is fitting that Kepler’s name today graces the first space mission dedicated to searching for planets beyond our Solar System using a similar ...
... enough to predict the transits of the inner planets Mercury and Venus across the Sun’s disc, which were first observed in 1631 and 1639, respectively. Thus it is fitting that Kepler’s name today graces the first space mission dedicated to searching for planets beyond our Solar System using a similar ...
August 2013 - Joliet Junior College
... should be active for a week before and a few days after the August 12th peak. The Perseids are left over debris - normally about the size of a grain of sand - from the last passing of Comet Swift Tuttle in 1992. In clear skies you can expect to see 60 to 80 meteors per hour. The meteors are small pi ...
... should be active for a week before and a few days after the August 12th peak. The Perseids are left over debris - normally about the size of a grain of sand - from the last passing of Comet Swift Tuttle in 1992. In clear skies you can expect to see 60 to 80 meteors per hour. The meteors are small pi ...
1 Introduction - Instituto de Astrofísica de Canarias
... the mass ratio of the possible stellar companion(s). Lissauer et al. (2004) [11] have studied the formation of terrestrial planets in binary star systems. The planets of the Solar System are characterized by their almost circular orbits. However, more than one third of the extrasolar planets detecte ...
... the mass ratio of the possible stellar companion(s). Lissauer et al. (2004) [11] have studied the formation of terrestrial planets in binary star systems. The planets of the Solar System are characterized by their almost circular orbits. However, more than one third of the extrasolar planets detecte ...
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.