Introduction to Basic Stargazing Part II - Naples Free-Net
... astronomical unit (au) – one au is defined as the average distance from Earth to the Sun. There are two reasons for this; 1. It greatly improves computational ease of raw data. 2. It improves comprehension of relative distances. For example, the astronomical unit is measured at 92,956,000 miles. If ...
... astronomical unit (au) – one au is defined as the average distance from Earth to the Sun. There are two reasons for this; 1. It greatly improves computational ease of raw data. 2. It improves comprehension of relative distances. For example, the astronomical unit is measured at 92,956,000 miles. If ...
Exoplanets for Amateur Astronomers
... • An extrasolar planet, or exoplanet, is a planet outside the Solar System. • Astronomers have suspected and searched for exoplanets since mid 19th century, but first scientifically confirmed discovery was found in 1995 (51 Pegasi) • As of January 2010, 429 have been discovered • Majority of ones fo ...
... • An extrasolar planet, or exoplanet, is a planet outside the Solar System. • Astronomers have suspected and searched for exoplanets since mid 19th century, but first scientifically confirmed discovery was found in 1995 (51 Pegasi) • As of January 2010, 429 have been discovered • Majority of ones fo ...
We especially need imagination in science. It is not all mathematics
... Question #1: Why are the observed motions in the solar system generally so orderly? ...
... Question #1: Why are the observed motions in the solar system generally so orderly? ...
Week 20 Satellites and Probes
... Observations made using the HST and terrestrial telescopes have revealed that the universe is expanding non-linearly—that is to say that the expansion of the universe is accelerating. The known laws of physics require some force or energy to cause the acceleration, but no force is immediately eviden ...
... Observations made using the HST and terrestrial telescopes have revealed that the universe is expanding non-linearly—that is to say that the expansion of the universe is accelerating. The known laws of physics require some force or energy to cause the acceleration, but no force is immediately eviden ...
L ,sl = (10
... The relationship between the luminosity of a star and the flux received at Earth is given by the inverse square law, ...
... The relationship between the luminosity of a star and the flux received at Earth is given by the inverse square law, ...
Unit 3 - Section 9.1 2011 Distances in Space0
... 1. The baseline is perpendicular (i.e., 90O) to a line draw from the middle of AB to point C. Thus, the triangle ABC is symmetric. If we call the drawn line r, then AC = BC = r 2. The length of AB is less than r. This means that the angle between AC and AB is small. This is the parallax of C as view ...
... 1. The baseline is perpendicular (i.e., 90O) to a line draw from the middle of AB to point C. Thus, the triangle ABC is symmetric. If we call the drawn line r, then AC = BC = r 2. The length of AB is less than r. This means that the angle between AC and AB is small. This is the parallax of C as view ...
Introductory Physics I (54
... 41) Which of the following statements about the Milky Way Galaxy is not true? A) The galaxy is about 100,000 light-years in diameter. B) Our solar system is located very close to the center of the Milky Way Galaxy. C) Our view of distant objects is obscured by gas and dust when we look into the gala ...
... 41) Which of the following statements about the Milky Way Galaxy is not true? A) The galaxy is about 100,000 light-years in diameter. B) Our solar system is located very close to the center of the Milky Way Galaxy. C) Our view of distant objects is obscured by gas and dust when we look into the gala ...
Nobel Prize in Physics for Accelerating Universe
... water similar to the water we find on Earth. • “Similar” means that the fraction of heavy water is same as in our oceans. • Heavy water is D2O instead of H2O, where D is deuterium which has a nucleus with one proton and one neutron. • The comet comes from the Kupier belt (30-50 AU) while most comets ...
... water similar to the water we find on Earth. • “Similar” means that the fraction of heavy water is same as in our oceans. • Heavy water is D2O instead of H2O, where D is deuterium which has a nucleus with one proton and one neutron. • The comet comes from the Kupier belt (30-50 AU) while most comets ...
Life and fate of a star
... cool down without the power supply of the nuclear reactions. Such a remnant is called a white dwarf, and there is notably a faint white dwarf in the middle of the Ring Nebula. The Ring Nebula is the glowing remain of a star like our Sun. The outer layers of the star were ejected four thousand years ...
... cool down without the power supply of the nuclear reactions. Such a remnant is called a white dwarf, and there is notably a faint white dwarf in the middle of the Ring Nebula. The Ring Nebula is the glowing remain of a star like our Sun. The outer layers of the star were ejected four thousand years ...
Mercury is the first planet from the sun. Named by
... was discovered on March 13, 1781. Uranus is the third largest planet in the solar system by diameter. Uranus is named after the Greek god Ouranos, god of the sky. It takes Uranus approximately 30,707 days to complete its orbit around the sun. Uranus has an average surface temperature of 68 Kelvins. ...
... was discovered on March 13, 1781. Uranus is the third largest planet in the solar system by diameter. Uranus is named after the Greek god Ouranos, god of the sky. It takes Uranus approximately 30,707 days to complete its orbit around the sun. Uranus has an average surface temperature of 68 Kelvins. ...
Charting The Universe - University of Windsor
... Pleiades from Orion, Greek gods placed them among the stars. Orion nightly stalks them across the sky! ...
... Pleiades from Orion, Greek gods placed them among the stars. Orion nightly stalks them across the sky! ...
The Origin of the Solar System: Progress in Understanding Accretion
... As yet, these new discoveries have not been incorporated into formation models. Where once we thought that Jupiter-like planets would naturally form at the distance from a star where water would condense, and represent a natural bulge in the mass available in the disk, we now have many counter-exam ...
... As yet, these new discoveries have not been incorporated into formation models. Where once we thought that Jupiter-like planets would naturally form at the distance from a star where water would condense, and represent a natural bulge in the mass available in the disk, we now have many counter-exam ...
Introduction to Astronomy
... This is the first lesson in a unit which encompasses both an introduction to astronomy, and some geological science. The Solar System means all the planets, moons and other bodies that circle around our Sun. Teaching this content may take more than one lesson to cover fully, suggestions for activiti ...
... This is the first lesson in a unit which encompasses both an introduction to astronomy, and some geological science. The Solar System means all the planets, moons and other bodies that circle around our Sun. Teaching this content may take more than one lesson to cover fully, suggestions for activiti ...
MULTIPLE CHOICE. Choose the one alternative that best
... 7) What is the likely reason that we cannot find any examples of the first generation stars? A) The first generation stars are too faint to be visible now. B) The first generation stars formed with only H and He and therefore have no spectral features. C) The first generation stars formed such a lon ...
... 7) What is the likely reason that we cannot find any examples of the first generation stars? A) The first generation stars are too faint to be visible now. B) The first generation stars formed with only H and He and therefore have no spectral features. C) The first generation stars formed such a lon ...
EXPLORING THE SOLAR SYSTEM
... Between Mars and Jupiter is a swarm of rubble called the asteroid belt. Asteroids are bits left over from the formation of the Solar System. There wasn’t much interest in the asteroids until the 1980s when it was realized that some of them stray from this belt and might hit the Earth. An asteroid im ...
... Between Mars and Jupiter is a swarm of rubble called the asteroid belt. Asteroids are bits left over from the formation of the Solar System. There wasn’t much interest in the asteroids until the 1980s when it was realized that some of them stray from this belt and might hit the Earth. An asteroid im ...
Exoplanet, 51 Pegasi b, Solar System, VLT, La Silla. ESOcast
... richest planetary system yet. The system, located over 120 light-years away around the Sun-like star HD 10180, contains at least five exoplanets. There is also tantalising evidence that two more planets may be present in this system, one of which would have the lowest mass ever found. ...
... richest planetary system yet. The system, located over 120 light-years away around the Sun-like star HD 10180, contains at least five exoplanets. There is also tantalising evidence that two more planets may be present in this system, one of which would have the lowest mass ever found. ...
The Sun, Stars, and Beyond
... sort of like a big egg. • There are spiral and barred spiral galaxies, • Irregularly shaped galaxies also exist, though fewer in number. • A galaxy’s shape is determined by its rate of spin, and if it has been subject to any collisions or ...
... sort of like a big egg. • There are spiral and barred spiral galaxies, • Irregularly shaped galaxies also exist, though fewer in number. • A galaxy’s shape is determined by its rate of spin, and if it has been subject to any collisions or ...
Why do things move?
... • Good news: no more need for complex epicycles to explain retrograde motion! Mars orbit ...
... • Good news: no more need for complex epicycles to explain retrograde motion! Mars orbit ...
Stars Student Page Purpose To investigate stellar classification by
... in this portion of the graph are now as supergiants. 4. Stars in the lower right portion of the graph will remain on the Main Sequence the longest. This is because they will burn their fuel very slowly compared with larger stars on other parts of the Main Sequence. 5. The Sun radiates at a peak wave ...
... in this portion of the graph are now as supergiants. 4. Stars in the lower right portion of the graph will remain on the Main Sequence the longest. This is because they will burn their fuel very slowly compared with larger stars on other parts of the Main Sequence. 5. The Sun radiates at a peak wave ...
The Sun and Planets Homework Solution 1.
... scale of 1-to-1.274 × 109 . In this case you would have to divide all other distances and diameters by 1.274 × 109 to end up with a consistent model. You could have used any other scaling, the only requirement is that your scaling is consistent. In Table 1 we provide a consistent scaling for a model ...
... scale of 1-to-1.274 × 109 . In this case you would have to divide all other distances and diameters by 1.274 × 109 to end up with a consistent model. You could have used any other scaling, the only requirement is that your scaling is consistent. In Table 1 we provide a consistent scaling for a model ...
habitability - Dr. Jonti Horner
... even billions, of years in the classical HZ to one that has only been habitable for tens of millions of years. It would no doubt be relatively straightforward to calculate how long a planet on a given orbit has been receiving enough energy from its parent star to host liquid water on its surface, an ...
... even billions, of years in the classical HZ to one that has only been habitable for tens of millions of years. It would no doubt be relatively straightforward to calculate how long a planet on a given orbit has been receiving enough energy from its parent star to host liquid water on its surface, an ...
Understanding Planetary Motion
... Aberration of Starlight • The true path of light from a star to a planet is in a straight line, however, due to the motion of a planet it appears as if starlight bends into a planet. This makes it seem as if the light is originating from a different location. – This is similar to driving in the sno ...
... Aberration of Starlight • The true path of light from a star to a planet is in a straight line, however, due to the motion of a planet it appears as if starlight bends into a planet. This makes it seem as if the light is originating from a different location. – This is similar to driving in the sno ...
Precambrian Time
... The first hominids appeared about 39 seconds ago. Modern humans have been on Earth for the past 6 seconds or so, or about 0.043% of Earth’s history... ...
... The first hominids appeared about 39 seconds ago. Modern humans have been on Earth for the past 6 seconds or so, or about 0.043% of Earth’s history... ...
I. Determination of stellar Parameters
... disk (independent of metallcity there!) • also Sun is more metal-rich than local average and might have formed at inner Galactic radii • model: metallicity-correlation from radial mixing of different Galactic components ...
... disk (independent of metallcity there!) • also Sun is more metal-rich than local average and might have formed at inner Galactic radii • model: metallicity-correlation from radial mixing of different Galactic components ...
Planetary habitability
Planetary habitability is the measure of a planet's or a natural satellite's potential to develop and sustain life. Life may develop directly on a planet or satellite or be transferred to it from another body, a theoretical process known as panspermia. As the existence of life beyond Earth is unknown, planetary habitability is largely an extrapolation of conditions on Earth and the characteristics of the Sun and Solar System which appear favourable to life's flourishing—in particular those factors that have sustained complex, multicellular organisms and not just simpler, unicellular creatures. Research and theory in this regard is a component of planetary science and the emerging discipline of astrobiology.An absolute requirement for life is an energy source, and the notion of planetary habitability implies that many other geophysical, geochemical, and astrophysical criteria must be met before an astronomical body can support life. In its astrobiology roadmap, NASA has defined the principal habitability criteria as ""extended regions of liquid water, conditions favourable for the assembly of complex organic molecules, and energy sources to sustain metabolism.""In determining the habitability potential of a body, studies focus on its bulk composition, orbital properties, atmosphere, and potential chemical interactions. Stellar characteristics of importance include mass and luminosity, stable variability, and high metallicity. Rocky, terrestrial-type planets and moons with the potential for Earth-like chemistry are a primary focus of astrobiological research, although more speculative habitability theories occasionally examine alternative biochemistries and other types of astronomical bodies.The idea that planets beyond Earth might host life is an ancient one, though historically it was framed by philosophy as much as physical science. The late 20th century saw two breakthroughs in the field. The observation and robotic spacecraft exploration of other planets and moons within the Solar System has provided critical information on defining habitability criteria and allowed for substantial geophysical comparisons between the Earth and other bodies. The discovery of extrasolar planets, beginning in the early 1990s and accelerating thereafter, has provided further information for the study of possible extraterrestrial life. These findings confirm that the Sun is not unique among stars in hosting planets and expands the habitability research horizon beyond the Solar System.The chemistry of life may have begun shortly after the Big Bang, 13.8 billion years ago, during a habitable epoch when the Universe was only 10–17 million years old. According to the panspermia hypothesis, microscopic life—distributed by meteoroids, asteroids and other small Solar System bodies—may exist throughout the universe. Nonetheless, Earth is the only place in the universe known to harbor life. Estimates of habitable zones around other stars, along with the discovery of hundreds of extrasolar planets and new insights into the extreme habitats here on Earth, suggest that there may be many more habitable places in the universe than considered possible until very recently. On 4 November 2013, astronomers reported, based on Kepler space mission data, that there could be as many as 40 billion Earth-sized planets orbiting in the habitable zones of Sun-like stars and red dwarfs within the Milky Way. 11 billion of these estimated planets may be orbiting Sun-like stars. The nearest such planet may be 12 light-years away, according to the scientists.