this PDF file - University of Leicester Open Journals
... new star had appeared in the sky which had never been seen before. This was the first evidence that stars actually change. However, we now know that Tycho observed the death of a star as opposed to the birth of a new star. Importantly, this one new point of light was evidence that the universe does ...
... new star had appeared in the sky which had never been seen before. This was the first evidence that stars actually change. However, we now know that Tycho observed the death of a star as opposed to the birth of a new star. Importantly, this one new point of light was evidence that the universe does ...
005 Astrophysics problems
... When the Apollo 11 satellite took the first men to the Moon in 1969 its trajectory was very closely monitored. The satellite had a velocity of 5374 m s-1 when 26306 km from the centre of the Earth and this had dropped to 3560 m s-1 when it was 54368 km from the centre of the Earth. The rocket motors ...
... When the Apollo 11 satellite took the first men to the Moon in 1969 its trajectory was very closely monitored. The satellite had a velocity of 5374 m s-1 when 26306 km from the centre of the Earth and this had dropped to 3560 m s-1 when it was 54368 km from the centre of the Earth. The rocket motors ...
1b91: answers to problem sheet no 1
... Outline the main phenomena observed in the Sun during its most active phases. Determine the fraction of energy emitted per unit area by a sunspot of temperature 4500 K compared to the surrounding photosphere of temperature 5800 K. When the Sun is in an active phase, the phenomena that are seen are: ...
... Outline the main phenomena observed in the Sun during its most active phases. Determine the fraction of energy emitted per unit area by a sunspot of temperature 4500 K compared to the surrounding photosphere of temperature 5800 K. When the Sun is in an active phase, the phenomena that are seen are: ...
Secrets of the Sun
... Seasonal patterns of sunrise and sunset can be observed, described, and predicted. (By end of grade 2). The orbits of Earth around the sun and of the moon around Earth, together with the rotation of Earth about an axis between its North and South poles, cause observable patterns. These include day a ...
... Seasonal patterns of sunrise and sunset can be observed, described, and predicted. (By end of grade 2). The orbits of Earth around the sun and of the moon around Earth, together with the rotation of Earth about an axis between its North and South poles, cause observable patterns. These include day a ...
No Slide Title
... planet survivability, if they both form at same time – Planets interior to a migrating giant planet will be disrupted and lost – Of course, these small planets may also migrate into star! ...
... planet survivability, if they both form at same time – Planets interior to a migrating giant planet will be disrupted and lost – Of course, these small planets may also migrate into star! ...
Shattering geocentric, anthrocentric worldviews since 1543
... The Copernican Revolution was one of the most important revolutions in the history of human thought. The transition from ancient superstition and dogma of the 15th century to Newton’s laws marked the start of the scientific age. Moving to the heliocentric model was just the first (and most difficult ...
... The Copernican Revolution was one of the most important revolutions in the history of human thought. The transition from ancient superstition and dogma of the 15th century to Newton’s laws marked the start of the scientific age. Moving to the heliocentric model was just the first (and most difficult ...
PPT
... Temperature in Celsius or Fahrenheit are conveniences Temperature in Kelvin directly measures how much heat a material has Temperature in Kelvin is always positive Nothing actually has a temperature of absolute zero ...
... Temperature in Celsius or Fahrenheit are conveniences Temperature in Kelvin directly measures how much heat a material has Temperature in Kelvin is always positive Nothing actually has a temperature of absolute zero ...
Astro101 lecture from Aug 27
... This picture of an annular eclipse of the Sun was taken by a video camera. An annular solar eclipse occurs when the Moon's angular size is slightly less than the Sun's angular size. Therefore, when the Moon is directly in front of the Sun, the edges of the Sun are still visible. This solar ring is s ...
... This picture of an annular eclipse of the Sun was taken by a video camera. An annular solar eclipse occurs when the Moon's angular size is slightly less than the Sun's angular size. Therefore, when the Moon is directly in front of the Sun, the edges of the Sun are still visible. This solar ring is s ...
Nov 2016 - Astronomical Society of Northern New England
... at virtually the same time each night for the rest of the year. That is because it is traveling eastward through our sky at very nearly the same rate that we are moving around the sun, one constellation per month. Unfortunately the European Space Agency’s Mars probe just crash landed on this planet, ...
... at virtually the same time each night for the rest of the year. That is because it is traveling eastward through our sky at very nearly the same rate that we are moving around the sun, one constellation per month. Unfortunately the European Space Agency’s Mars probe just crash landed on this planet, ...
The Origin of the Earth What`s New?
... modeling and the Giant Impact hypothesis for Moon formation). With a half-life of 8.9 Myr, W isotopes will not record Hf/W changes >60 Myr after the start of the solar system. In principle roughly half the Earth’s core could have formed at the start of the solar system and the other half during the ...
... modeling and the Giant Impact hypothesis for Moon formation). With a half-life of 8.9 Myr, W isotopes will not record Hf/W changes >60 Myr after the start of the solar system. In principle roughly half the Earth’s core could have formed at the start of the solar system and the other half during the ...
Starry Night Lab
... 0. Turn on Guides/Ecliptic. The word "ecliptic" means the plane of the solar system. The planets (including Earth), the sun, and the moon all lie roughly in this plane. From Earth, we see the ecliptic as an arcing line across the sky, along which the sun, moon, and planets travel. 1. Set the clock f ...
... 0. Turn on Guides/Ecliptic. The word "ecliptic" means the plane of the solar system. The planets (including Earth), the sun, and the moon all lie roughly in this plane. From Earth, we see the ecliptic as an arcing line across the sky, along which the sun, moon, and planets travel. 1. Set the clock f ...
The Planetarium Fleischmann Planetarium
... galaxies are best viewed in ultraviolet light. They consist of artist conceptions of a typical mature galaxy like our own Milky Way (left) and a typical young galaxy (right). Young galaxies light up in ultraviolet because they are filled with hot, newborn stars, objects that pack most of their light ...
... galaxies are best viewed in ultraviolet light. They consist of artist conceptions of a typical mature galaxy like our own Milky Way (left) and a typical young galaxy (right). Young galaxies light up in ultraviolet because they are filled with hot, newborn stars, objects that pack most of their light ...
CML_DPS_PressBriefing_10Oct2006
... 9P/Tempel 1 or C/Hale-Bopp 1995 O1 and comet-dominated YSO HD100546. It lacks carbonaceous and ferrous materials but includes small icy grains. - The composition of the HD 69830 dust resembles that of a disrupted P or D-type asteroid. The amount of mass responsible for the observed emission is the e ...
... 9P/Tempel 1 or C/Hale-Bopp 1995 O1 and comet-dominated YSO HD100546. It lacks carbonaceous and ferrous materials but includes small icy grains. - The composition of the HD 69830 dust resembles that of a disrupted P or D-type asteroid. The amount of mass responsible for the observed emission is the e ...
ASTR-100 - Jiri Brezina Teaching
... Dynamics, Tab. A.4, p. 531). The revolution (orbiting) is ccw when seen from north on all planets and most of their satellites; the axial rotation is ccw when seen from north only on 6 from 9 planets and on most of their 142 satellites. Since the stars seem to make 366 revolutions in a year (365 due ...
... Dynamics, Tab. A.4, p. 531). The revolution (orbiting) is ccw when seen from north on all planets and most of their satellites; the axial rotation is ccw when seen from north only on 6 from 9 planets and on most of their 142 satellites. Since the stars seem to make 366 revolutions in a year (365 due ...
STAR MAKER Olaf Stapledon
... only invaded us from the world; it welled up also within our own magic circle. For horror at our futility, at our own unreality, and not only at the world's delirium, had driven me out on to the hill. We were always hurrying from one little urgent task to another, but the upshot was insubstantial. H ...
... only invaded us from the world; it welled up also within our own magic circle. For horror at our futility, at our own unreality, and not only at the world's delirium, had driven me out on to the hill. We were always hurrying from one little urgent task to another, but the upshot was insubstantial. H ...
Kindergarten Kit Manual - Alberta Science Network
... Activity G – Astronomy: exploring the solar system Background: Our world often seems very large. But our planet, Earth, is actually one of the smaller planets in our solar system. All of our planets orbit the Sun, which is a fairly small star. Stars are not planets as they produce energy by converti ...
... Activity G – Astronomy: exploring the solar system Background: Our world often seems very large. But our planet, Earth, is actually one of the smaller planets in our solar system. All of our planets orbit the Sun, which is a fairly small star. Stars are not planets as they produce energy by converti ...
Howard 2013 Observed properties of exoplanets
... giants) vary in size by a factor of ~2. For Planet size (relative to Earth) mass-period plane shows that occurrence the gas giants, the size dispersion at a varies as M – 0.31 ± 0.2P +0.26 ± 0.1 per loggiven mass largely is due to two effects. First, the presence of a massive solid arithmic interval ...
... giants) vary in size by a factor of ~2. For Planet size (relative to Earth) mass-period plane shows that occurrence the gas giants, the size dispersion at a varies as M – 0.31 ± 0.2P +0.26 ± 0.1 per loggiven mass largely is due to two effects. First, the presence of a massive solid arithmic interval ...
Planetary Cycles
... nature is the divine law of correspondences: “As above so below.” All the processes and cycles of the solar system, the Macrocosm, are repeated within each human being, the Microcosm. While we cannot here go into anthropology we may say briefly that it is the grouping of individuals which makes nati ...
... nature is the divine law of correspondences: “As above so below.” All the processes and cycles of the solar system, the Macrocosm, are repeated within each human being, the Microcosm. While we cannot here go into anthropology we may say briefly that it is the grouping of individuals which makes nati ...
Astronomy
... (b) Describe the similarities and differences of several types of astronomical telescopes. (c) Explain the purposes of at least three instruments used with astronomical telescopes. (d) Describe the proper care and storage of telescopes and binoculars both at home and in the ...
... (b) Describe the similarities and differences of several types of astronomical telescopes. (c) Explain the purposes of at least three instruments used with astronomical telescopes. (d) Describe the proper care and storage of telescopes and binoculars both at home and in the ...
friction Pluto
... Our solar system is extremely complex. There are more objects out there than the sun and nine planets. There are many questions scientists research about our solar system, in the past, present and future. One question that has been researched is how were planets and space objects formed? One thing i ...
... Our solar system is extremely complex. There are more objects out there than the sun and nine planets. There are many questions scientists research about our solar system, in the past, present and future. One question that has been researched is how were planets and space objects formed? One thing i ...
AST 301 Introduction to Astronomy - University of Texas Astronomy
... How were the atoms in your body made? The hydrogen atoms (or the protons and electrons they are made of) were made in the big bang. Many of the helium atoms in the Universe were also made in the big bang. The other atoms were made inside of stars or during explosions of stars. When the Sun becomes ...
... How were the atoms in your body made? The hydrogen atoms (or the protons and electrons they are made of) were made in the big bang. Many of the helium atoms in the Universe were also made in the big bang. The other atoms were made inside of stars or during explosions of stars. When the Sun becomes ...
“From Planetesimals to Brown Dwarfs: What is a Planet
... One final threshold that occurs near this size range is that when the central pressure of the object begins to be large enough that the materials have significantly higher densities than their non-compressed forms. The central pressure at which such compression occurs is approximately equal to the ...
... One final threshold that occurs near this size range is that when the central pressure of the object begins to be large enough that the materials have significantly higher densities than their non-compressed forms. The central pressure at which such compression occurs is approximately equal to the ...
Spring 2017 - Astronomers of Humboldt
... one commemorated the 50th anniversary of the incorporation of AOH. It is our hope that this year’s Potluck will mark the beginning of many more potlucks to come. It was an enjoyable evening with new and veteran members coming together for fellowship and good food. We were fortunate to enlist HSU Pro ...
... one commemorated the 50th anniversary of the incorporation of AOH. It is our hope that this year’s Potluck will mark the beginning of many more potlucks to come. It was an enjoyable evening with new and veteran members coming together for fellowship and good food. We were fortunate to enlist HSU Pro ...
Lecture15_v1 - Lick Observatory
... can spin to send you randomly to any time in Earth’s history. If you spin the dial, travel through time, and walk out, what is most likely to happen to you? A. You’ll be eaten by dinosaurs. B. You’ll suffocate because you’ll be unable to breathe the air. C. You’ll be consumed by toxic bacteria. D. N ...
... can spin to send you randomly to any time in Earth’s history. If you spin the dial, travel through time, and walk out, what is most likely to happen to you? A. You’ll be eaten by dinosaurs. B. You’ll suffocate because you’ll be unable to breathe the air. C. You’ll be consumed by toxic bacteria. D. N ...
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.