ppt - Institute for Astronomy
... But the companion could have been ejected a few thousand years ago. FU Ori must in this picture be a close binary with a separation of roughly 10 AU, i.e. the system should be a triple. In the intervening years the newborn binary has had time to spiral together, reaching now the period of FUor ...
... But the companion could have been ejected a few thousand years ago. FU Ori must in this picture be a close binary with a separation of roughly 10 AU, i.e. the system should be a triple. In the intervening years the newborn binary has had time to spiral together, reaching now the period of FUor ...
threat definition and verification
... This crop circle has another unusual feature; an off-center cleared circle containing the inner planets’ orbits. Assuming this circle defines the centroid of the Sun-Vulcan complex, then it is in the direction of Vulcan as of either the date the T367 crop circle was formed or the date represented by ...
... This crop circle has another unusual feature; an off-center cleared circle containing the inner planets’ orbits. Assuming this circle defines the centroid of the Sun-Vulcan complex, then it is in the direction of Vulcan as of either the date the T367 crop circle was formed or the date represented by ...
Recent Measurements of Millisecond Pulsar Masses
... nearly the speed of light! This would exclude most known models for the behavior of matter at supra-nuclear densities! ...
... nearly the speed of light! This would exclude most known models for the behavior of matter at supra-nuclear densities! ...
Saturn - Heroku
... saturn s roots in greek mythology, saturn educational facts and history of the planet saturn saturn is the sixth planet from the sun and the second largest planet profile orbit 1 429 400 000 km 9 54 au from sun diameter 120 536 km equatorial, saturn facts interesting facts about planet saturn - satu ...
... saturn s roots in greek mythology, saturn educational facts and history of the planet saturn saturn is the sixth planet from the sun and the second largest planet profile orbit 1 429 400 000 km 9 54 au from sun diameter 120 536 km equatorial, saturn facts interesting facts about planet saturn - satu ...
Untitled
... Formula 3.7 is plotted in Fig. 3.4 for a hypothetical isothermal planet with zero albedo. Because of the square-root dependence on orbital distance, the temperature varies only weakly with distance, except very near the star. Neglecting albedo and atmospheric effects, Earth would have a mean surface ...
... Formula 3.7 is plotted in Fig. 3.4 for a hypothetical isothermal planet with zero albedo. Because of the square-root dependence on orbital distance, the temperature varies only weakly with distance, except very near the star. Neglecting albedo and atmospheric effects, Earth would have a mean surface ...
the role of comets in panspermia - ORCA
... The hundreds of billions of comets in the Oort cloud that surround the solar system could serve as a likely primordial reservoir of life in the solar system. Primitive microbial life contained and amplified within comets, could be dispersed as individual microbes or clusters of microbes to reach nas ...
... The hundreds of billions of comets in the Oort cloud that surround the solar system could serve as a likely primordial reservoir of life in the solar system. Primitive microbial life contained and amplified within comets, could be dispersed as individual microbes or clusters of microbes to reach nas ...
Document
... overabundant by a factor of up to 104 ) is so great that a signficant fraction of the supply of such elements in the Universe would be contained in Ap stars if this abundance extended throughout the star • Explanations: abnormal model atmosopheres, accretion of planetesimals, interior nuclear proces ...
... overabundant by a factor of up to 104 ) is so great that a signficant fraction of the supply of such elements in the Universe would be contained in Ap stars if this abundance extended throughout the star • Explanations: abnormal model atmosopheres, accretion of planetesimals, interior nuclear proces ...
Chapter2 - Discovering the Universe for yourself-pptx
... notice with the naked eye. 2. Earth does not orbit the Sun; it is the center of the universe. With rare exceptions, such as Aristarchus, the Greeks rejected the correct explanation (1) because they did not think the stars could be that far away. Thus the stage was set for the long, historical showdo ...
... notice with the naked eye. 2. Earth does not orbit the Sun; it is the center of the universe. With rare exceptions, such as Aristarchus, the Greeks rejected the correct explanation (1) because they did not think the stars could be that far away. Thus the stage was set for the long, historical showdo ...
IFAS Novice Handbook - Indiana Astronomical Society
... Even in ancient times, it was known that a number of "stars" did not stay in the same position relative to the others. There were five such restless "stars" known-Mercury, Venus, Mars, Jupiter, and Saturn-and the Greeks referred to them as planetes, a word which means "wanderers." That Earth is one ...
... Even in ancient times, it was known that a number of "stars" did not stay in the same position relative to the others. There were five such restless "stars" known-Mercury, Venus, Mars, Jupiter, and Saturn-and the Greeks referred to them as planetes, a word which means "wanderers." That Earth is one ...
Introduction - Beck-Shop
... that they will be dragged away into the planet’s atmosphere in a thousand years or less. The angular momentum that is now being transferred between rings and the nearby moons through density waves should have caused them to spread much further apart than they are now. Further, the small moons discov ...
... that they will be dragged away into the planet’s atmosphere in a thousand years or less. The angular momentum that is now being transferred between rings and the nearby moons through density waves should have caused them to spread much further apart than they are now. Further, the small moons discov ...
argo and other tidal structures around the milky way
... A sample of 2MASS M giants is used to search for overdensities that may be associated with substructure in the Galactic halo at low latitudes. Under the hypothesis that stellar populations in the outer Milky Way should be more or less symmetrically distributed, two methods were used to identify asym ...
... A sample of 2MASS M giants is used to search for overdensities that may be associated with substructure in the Galactic halo at low latitudes. Under the hypothesis that stellar populations in the outer Milky Way should be more or less symmetrically distributed, two methods were used to identify asym ...
Pluto, the dwarf planet
... gases rise, they temporarily form a thin atmosphere. Pluto's low gravity — about six percent of Earth's — allows the atmosphere to extend much higher than our planet's. Pluto becomes much colder during the part of each orbit when it is traveling far away from the sun. During this time, the bulk of t ...
... gases rise, they temporarily form a thin atmosphere. Pluto's low gravity — about six percent of Earth's — allows the atmosphere to extend much higher than our planet's. Pluto becomes much colder during the part of each orbit when it is traveling far away from the sun. During this time, the bulk of t ...
are coronae of late-type stars made of solar-like structures? the x
... studied a sample of young late-type stars and found a powerlaw dependence of total X-ray luminosity on the temperature of the hottest component. This work is based on methods and results developed in our program to study the solar-stellar connection in X-rays, mostly based on ROSAT PSPC and Yohkoh S ...
... studied a sample of young late-type stars and found a powerlaw dependence of total X-ray luminosity on the temperature of the hottest component. This work is based on methods and results developed in our program to study the solar-stellar connection in X-rays, mostly based on ROSAT PSPC and Yohkoh S ...
Document
... • We’ve talked about how the solar system probably formed from the solar nebula about 4.6 million years ago. • There is stuff in between the stars– dust and gas– that we call the interstellar medium. • The interstellar medium is about 10% of our galaxies mass. Consists of 90% hydrogen, 9% helium, an ...
... • We’ve talked about how the solar system probably formed from the solar nebula about 4.6 million years ago. • There is stuff in between the stars– dust and gas– that we call the interstellar medium. • The interstellar medium is about 10% of our galaxies mass. Consists of 90% hydrogen, 9% helium, an ...
Glencoe Earth Science
... Foldable to show what you know about stars, galaxies, and the universe. STEP 1 Fold a sheet of paper from side to side. Make the front edge about 1.25 cm shorter than the ...
... Foldable to show what you know about stars, galaxies, and the universe. STEP 1 Fold a sheet of paper from side to side. Make the front edge about 1.25 cm shorter than the ...
on the nature of the dust in the debris disk around hd 69830
... in the best-fit linear sum spectrum (Fig. 3 and Table 1). Assuming crystalline densities for the mainly small ("1 !m or less radius) dust, we can convert these weights, which are the observed surface area of each species referenced to a 400 K blackbody at the distance of HD 69830, into the relative ...
... in the best-fit linear sum spectrum (Fig. 3 and Table 1). Assuming crystalline densities for the mainly small ("1 !m or less radius) dust, we can convert these weights, which are the observed surface area of each species referenced to a 400 K blackbody at the distance of HD 69830, into the relative ...
Untitled
... near the planet, one of which was off to the west and the other two were to the east, all lying in a straight line. The observation from the subsequent nights revealed that all three stars were now positioned on the west of Jupiter however still in a straight line. On January 10th, he noticed that o ...
... near the planet, one of which was off to the west and the other two were to the east, all lying in a straight line. The observation from the subsequent nights revealed that all three stars were now positioned on the west of Jupiter however still in a straight line. On January 10th, he noticed that o ...
Stars A globular cluster is a tightly grouped swarm of stars held
... galaxy may be 100 billion. Thus, more than 10 billion trillion stars may exist. But if you look at the night sky far from city lights, you can see only about 3,000 of them without using binoculars or a telescope. Stars, like people, have life cycles -- they are born, pass through several phases, and ...
... galaxy may be 100 billion. Thus, more than 10 billion trillion stars may exist. But if you look at the night sky far from city lights, you can see only about 3,000 of them without using binoculars or a telescope. Stars, like people, have life cycles -- they are born, pass through several phases, and ...
Journey through the cosmos
... Examples of ancient models of the Universe Models described by the ancient Greeks placed Earth as the supreme centre of the Universe. Aristotle (384–322 BC) pictured the Universe with Earth at its centre. No one dared question the teachings of such a famous man who was tutor to Alexander the Great. ...
... Examples of ancient models of the Universe Models described by the ancient Greeks placed Earth as the supreme centre of the Universe. Aristotle (384–322 BC) pictured the Universe with Earth at its centre. No one dared question the teachings of such a famous man who was tutor to Alexander the Great. ...
Document
... core exposed as white dwarf. Planetary nebulae are one of nature’s ways of recycling the matter in old stars and distributing new elements. ...
... core exposed as white dwarf. Planetary nebulae are one of nature’s ways of recycling the matter in old stars and distributing new elements. ...
Tidal Venuses: Triggering a Climate Catastrophe via Tidal Heating
... i.e. one hemisphere always facing the star, was emphasized. Kasting et al. (1993) quantified this concept and found that planets orbiting within the HZ of stars less than two-thirds the mass of the Sun were in danger of synchronization. Although their analysis was limited to Earth-like planets on ci ...
... i.e. one hemisphere always facing the star, was emphasized. Kasting et al. (1993) quantified this concept and found that planets orbiting within the HZ of stars less than two-thirds the mass of the Sun were in danger of synchronization. Although their analysis was limited to Earth-like planets on ci ...
Formation and evolution of the Solar System
The formation of the Solar System began 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. Most of the collapsing mass collected in the center, forming the Sun, while the rest flattened into a protoplanetary disk out of which the planets, moons, asteroids, and other small Solar System bodies formed.This widely accepted model, known as the nebular hypothesis, was first developed in the 18th century by Emanuel Swedenborg, Immanuel Kant, and Pierre-Simon Laplace. Its subsequent development has interwoven a variety of scientific disciplines including astronomy, physics, geology, and planetary science. Since the dawn of the space age in the 1950s and the discovery of extrasolar planets in the 1990s, the model has been both challenged and refined to account for new observations.The Solar System has evolved considerably since its initial formation. Many moons have formed from circling discs of gas and dust around their parent planets, while other moons are thought to have formed independently and later been captured by their planets. Still others, such as the Moon, may be the result of giant collisions. Collisions between bodies have occurred continually up to the present day and have been central to the evolution of the Solar System. The positions of the planets often shifted due to gravitational interactions. This planetary migration is now thought to have been responsible for much of the Solar System's early evolution.In roughly 5 billion years, the Sun will cool and expand outward many times its current diameter (becoming a red giant), before casting off its outer layers as a planetary nebula and leaving behind a stellar remnant known as a white dwarf. In the far distant future, the gravity of passing stars will gradually reduce the Sun's retinue of planets. Some planets will be destroyed, others ejected into interstellar space. Ultimately, over the course of tens of billions of years, it is likely that the Sun will be left with none of the original bodies in orbit around it.