Some Concepts of Physics
... • For life to exist on a palnet, it must also be in the habitable zone. This is the region in the solar system which is neither too hot nor too cold, but just right. Astronomers believe that in other solar systems, too, such habitable zones exist and life is more probable in those planets which fall ...
... • For life to exist on a palnet, it must also be in the habitable zone. This is the region in the solar system which is neither too hot nor too cold, but just right. Astronomers believe that in other solar systems, too, such habitable zones exist and life is more probable in those planets which fall ...
flares
... observation of the forms and positions of the solar spots, an appearance was witnessed which I believe to be exceedingly rare. … I had secured diagrams of all the groups and detached spots, and was engaged at the time in counting from the chronometer and recording the contacts of the spots with the ...
... observation of the forms and positions of the solar spots, an appearance was witnessed which I believe to be exceedingly rare. … I had secured diagrams of all the groups and detached spots, and was engaged at the time in counting from the chronometer and recording the contacts of the spots with the ...
Cycles - Needham.K12.ma.us
... is made because the moon tries to pull the Earth out from under the water! ...
... is made because the moon tries to pull the Earth out from under the water! ...
The Planets - Andrew's Blog
... in 1877, but his wife Angelina urged him on. He discovered Deimos the next night, and Phobos six nights after that. Ninety-four years later, NASA's Mariner 9 spacecraft got a much better look at the two moons from its orbit around Mars. The dominant feature on Phobos, it found, was a crater 10 km (6 ...
... in 1877, but his wife Angelina urged him on. He discovered Deimos the next night, and Phobos six nights after that. Ninety-four years later, NASA's Mariner 9 spacecraft got a much better look at the two moons from its orbit around Mars. The dominant feature on Phobos, it found, was a crater 10 km (6 ...
High velocity clouds (v > 90 km/s), up to 108 M_sun in total Seen at
... This is how V should fall off with r as long as all of the mass is interior to the orbits being considered. Now, consider a spherical distribution of mass of uniform density, in which particles (stars) orbit inside the mass distribution. The mass interior to the orbit is then ! ...
... This is how V should fall off with r as long as all of the mass is interior to the orbits being considered. Now, consider a spherical distribution of mass of uniform density, in which particles (stars) orbit inside the mass distribution. The mass interior to the orbit is then ! ...
The Evening Sky in February 2016
... In February bright stars are nearly overhead. Sirius, the brightest star, is north of the zenith. Canopus, the second brightest star, is south of the zenith. Below and left of Sirius are Orion's bright stars: bluish Rigel and reddish Betelgeuse. Between them is the line of three stars making Orion's ...
... In February bright stars are nearly overhead. Sirius, the brightest star, is north of the zenith. Canopus, the second brightest star, is south of the zenith. Below and left of Sirius are Orion's bright stars: bluish Rigel and reddish Betelgeuse. Between them is the line of three stars making Orion's ...
ASTR 553/554 (1) : Questions
... (ii) Compare the total energy liberated by the sun and the human star integrated over their respective lifetimes. (iii) Compare this ratio to the ratio of typical outer-electron binding energies (driving chemistry) with typical nuclear binding energies (driving fusion). Notice: solar type stars live ...
... (ii) Compare the total energy liberated by the sun and the human star integrated over their respective lifetimes. (iii) Compare this ratio to the ratio of typical outer-electron binding energies (driving chemistry) with typical nuclear binding energies (driving fusion). Notice: solar type stars live ...
Indirect Observation Method - Portal do Professor
... What is the Sun? If it is a star, why is it so much brighter than those we see during the night? If the Sun is so much brighter than the Moon, why do these two bodies seem to be the same size when observed from the Earth (this fact is even more evident during total solar eclipses when the new Moon c ...
... What is the Sun? If it is a star, why is it so much brighter than those we see during the night? If the Sun is so much brighter than the Moon, why do these two bodies seem to be the same size when observed from the Earth (this fact is even more evident during total solar eclipses when the new Moon c ...
Lunar eclipses
... eclipse. Instead it can be seen as a very dark red color because of the refraction of sunlight through the Earth's atmosphere. ...
... eclipse. Instead it can be seen as a very dark red color because of the refraction of sunlight through the Earth's atmosphere. ...
The GAIA astrometric survey of extra
... With the current payload design [19], the range of planetary masses between 1 Earth-mass and a few Earth-masses (Neptune-class planets) will only be marginally accessible to GAIA’s all-sky survey. Its astrometric accuracy will be sufficient to address the issue of their existence only around a handf ...
... With the current payload design [19], the range of planetary masses between 1 Earth-mass and a few Earth-masses (Neptune-class planets) will only be marginally accessible to GAIA’s all-sky survey. Its astrometric accuracy will be sufficient to address the issue of their existence only around a handf ...
What is a Star? - Yale Astronomy
... 4 fundamental forces of nature: 1. gravity (dominant force on large scales in universe) 2. electromagnetism (underlies gas pressure) 3. strong nuclear force (binds nucleons n,p together) 4. weak nuclear force (responsible for radioactive decay of nuclei) ...
... 4 fundamental forces of nature: 1. gravity (dominant force on large scales in universe) 2. electromagnetism (underlies gas pressure) 3. strong nuclear force (binds nucleons n,p together) 4. weak nuclear force (responsible for radioactive decay of nuclei) ...
five minute episode script
... DEAN: MERCURY IS THE CLOSEST TO THE SUN AND MOVES THE FASTEST. VENUS IS SECOND, EARTH IS THIRD, AND MARS IS FOURTH. JAMES: THE DISTANCE FROM THE SUN DETERMINES HOW FAST A PLANET WILL MOVE AND HOW LONG IT TAKES TO MAKE ONE TRIP AROUND THE SUN. THAT'S ITS YEAR. DEAN: A YEAR ON EARTH IS ABOUT 365 DAYS ...
... DEAN: MERCURY IS THE CLOSEST TO THE SUN AND MOVES THE FASTEST. VENUS IS SECOND, EARTH IS THIRD, AND MARS IS FOURTH. JAMES: THE DISTANCE FROM THE SUN DETERMINES HOW FAST A PLANET WILL MOVE AND HOW LONG IT TAKES TO MAKE ONE TRIP AROUND THE SUN. THAT'S ITS YEAR. DEAN: A YEAR ON EARTH IS ABOUT 365 DAYS ...
Homework 12 1. How would phases change if the Moon were the
... same size as Earth, but still had the same mass? Both total and partial solar eclipses would be more frequent because there is a greater chance that the larger Moon would block the Sun. The Earth will have more Moon to block, but a bigger target. Their will be more partial lunar eclipses and fewer t ...
... same size as Earth, but still had the same mass? Both total and partial solar eclipses would be more frequent because there is a greater chance that the larger Moon would block the Sun. The Earth will have more Moon to block, but a bigger target. Their will be more partial lunar eclipses and fewer t ...
Four Great Satellite Observatories Hubble Space Telescope
... By far the smallest planet. Not a gas giant like other outer planets. Has an icy composition like a comet. Has a very elliptical, inclined orbit. Pluto has more in common with comets than with the eight major planets ...
... By far the smallest planet. Not a gas giant like other outer planets. Has an icy composition like a comet. Has a very elliptical, inclined orbit. Pluto has more in common with comets than with the eight major planets ...
Goal: To understand what the Kuiper Belt is, and why it is
... • TNOs are made of materials that have not changed since the formation of the solar system. • This means by studying them we can see what our solar system was like 4.5 billion years ago. • Why no planets? Well, as you went further out there was less stuff, and it took longer for the stuff that was t ...
... • TNOs are made of materials that have not changed since the formation of the solar system. • This means by studying them we can see what our solar system was like 4.5 billion years ago. • Why no planets? Well, as you went further out there was less stuff, and it took longer for the stuff that was t ...
Mercury
... Mercury is the planet closest to our Sun, and it is the eighth largest of the nine planets. Mercury is the planet closest to our Sun, and it is the eighth largest of the nine planets. One of Mercury's largest features is called the Caloris Basin. It is about 1300 km across! It was probably created b ...
... Mercury is the planet closest to our Sun, and it is the eighth largest of the nine planets. Mercury is the planet closest to our Sun, and it is the eighth largest of the nine planets. One of Mercury's largest features is called the Caloris Basin. It is about 1300 km across! It was probably created b ...
Our Universe
... •Our Sun has around 5 Billion years remaining. It is predicted to only exist for 10 Billion total years. ...
... •Our Sun has around 5 Billion years remaining. It is predicted to only exist for 10 Billion total years. ...
Some Important Introductory Concepts
... Kepler’s 3rd law, as modified by Newton (coming up), will be a cornerstone of much of this course, because it allows us to estimate masses of astronomical objects (e.g. masses of stars, galaxies, the existence of black holes and the mysterious “dark matter”). Example of use of Kepler’s 3rd law: Th ...
... Kepler’s 3rd law, as modified by Newton (coming up), will be a cornerstone of much of this course, because it allows us to estimate masses of astronomical objects (e.g. masses of stars, galaxies, the existence of black holes and the mysterious “dark matter”). Example of use of Kepler’s 3rd law: Th ...
Jupiter
... Jupiter is the fifth planet from the Sun and the largest planet within the Solar System. One of the storm is called the Great Red Spot Jupiter is classified as a gas giant along with Saturn, Uranus and Neptune but it is the biggest of the gas giant and Jupiter have stronger winds and storms than Ea ...
... Jupiter is the fifth planet from the Sun and the largest planet within the Solar System. One of the storm is called the Great Red Spot Jupiter is classified as a gas giant along with Saturn, Uranus and Neptune but it is the biggest of the gas giant and Jupiter have stronger winds and storms than Ea ...
University of Alaska Southeast Integrated Unit: The Solar System
... Lesson: Begin this lesson by returning to the historical aspects of astronomy and explain that people long ago began to notice different celestial bodies that seemed to shimmer and twinkle in the sky. They also noticed that some of these bodies changed position in the sky from week to week and seas ...
... Lesson: Begin this lesson by returning to the historical aspects of astronomy and explain that people long ago began to notice different celestial bodies that seemed to shimmer and twinkle in the sky. They also noticed that some of these bodies changed position in the sky from week to week and seas ...
Lecture03
... • Responsible for our familiar calendar “day”. • Period (of rotation) = 24 hours = (24 hours)x(60 min/hr)x(60s/min) =86,400 s • Astronomers refer to this 24 hour period as a mean solar day (§2-7), implying that this time period is measured with respect to the Sun’s position on the sky. • A sidereal ...
... • Responsible for our familiar calendar “day”. • Period (of rotation) = 24 hours = (24 hours)x(60 min/hr)x(60s/min) =86,400 s • Astronomers refer to this 24 hour period as a mean solar day (§2-7), implying that this time period is measured with respect to the Sun’s position on the sky. • A sidereal ...
Part 1
... Some meteorites have sufficient mass to create a depression in Earth’s crust called an ...
... Some meteorites have sufficient mass to create a depression in Earth’s crust called an ...
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.