Sample Chapter
... on Mars. In 1976, there were two more expeditions in the spacecraft Viking. Scientists wanted to find aliens there! But they didn’t find life on Mars. On 3rd January 2004, a NASA robot landed on Mars. Now we have new photos of this amazing planet. ...
... on Mars. In 1976, there were two more expeditions in the spacecraft Viking. Scientists wanted to find aliens there! But they didn’t find life on Mars. On 3rd January 2004, a NASA robot landed on Mars. Now we have new photos of this amazing planet. ...
Planets around Other Stars
... Reproduced below is a plot of observations of the radial velocity of the star 51 Pegasi, the first star discovered to have a planet. The observed velocity (in meters per second) is plotted vs. the time (in days) when the observation was made. The velocity of the star varies with time because the sta ...
... Reproduced below is a plot of observations of the radial velocity of the star 51 Pegasi, the first star discovered to have a planet. The observed velocity (in meters per second) is plotted vs. the time (in days) when the observation was made. The velocity of the star varies with time because the sta ...
Comparing Earth, Sun and Jupiter
... Slight wobble due to eccentricity of orbit Rilles found all over moon’s surface: may be evidence of liquid lava flow at earlier time Mars Red surface, due to high iron content Polar caps clearly visible: indicate water content Change with seasons Atmosphere very thin and dry; planet is too small t ...
... Slight wobble due to eccentricity of orbit Rilles found all over moon’s surface: may be evidence of liquid lava flow at earlier time Mars Red surface, due to high iron content Polar caps clearly visible: indicate water content Change with seasons Atmosphere very thin and dry; planet is too small t ...
Physics 2028: Great Ideas in Science II: The Changing Earth Module
... to collapse as described above. 2. As a large portion of the GMC collapses, many internal eddies and turbulent motions can exist within the cloud. As a result, when fragmentation to stellar-mass sizes occur, each little cloudlet has a rotation associated with it that was induced from one of these ed ...
... to collapse as described above. 2. As a large portion of the GMC collapses, many internal eddies and turbulent motions can exist within the cloud. As a result, when fragmentation to stellar-mass sizes occur, each little cloudlet has a rotation associated with it that was induced from one of these ed ...
powerpoint version
... • Mass about half that of Jupiter • Just 0.05 AU from star (1/20th of Earth-Sun) • Surface temperature probably about 1300 K • Confirmed by Marcy and Butler Nothing like Mercury / the solar system. How did it get there? Massive planet formed further out and dragged in by gas and dust? If so, any ter ...
... • Mass about half that of Jupiter • Just 0.05 AU from star (1/20th of Earth-Sun) • Surface temperature probably about 1300 K • Confirmed by Marcy and Butler Nothing like Mercury / the solar system. How did it get there? Massive planet formed further out and dragged in by gas and dust? If so, any ter ...
Chapter 29 Our Solar System
... is the planet most similar to Earth in physical properties, such as diameter, mass, and density. ...
... is the planet most similar to Earth in physical properties, such as diameter, mass, and density. ...
Nick Bowden The Final Frontier
... much younger than those of the southern hemisphere. Mars is a small world--Its radius is half of the Earth’s surface Covered by a fine layer of iron oxide dust that has the consistency of talcum powder--gives the planet its characteristic red hue (Red Planet) ...
... much younger than those of the southern hemisphere. Mars is a small world--Its radius is half of the Earth’s surface Covered by a fine layer of iron oxide dust that has the consistency of talcum powder--gives the planet its characteristic red hue (Red Planet) ...
Unit Review Answers - click here
... 16. The classification of inner and outer planets is based on the composition and distance from the Sun. The inner planets are closest to the Sun (inner part of the solar system) and have rocky compositions, so they should be classified together. The outer planets are much farther away from the Sun ...
... 16. The classification of inner and outer planets is based on the composition and distance from the Sun. The inner planets are closest to the Sun (inner part of the solar system) and have rocky compositions, so they should be classified together. The outer planets are much farther away from the Sun ...
Regents Earth Science – Unit 5: Astronomy
... planet and the faster the planet will move in orbit ...
... planet and the faster the planet will move in orbit ...
HERE
... 8. Many people see interesting shapes when they look at the moon. They are seeing dark, flat areas called ___. 9. The solar system bodies that are about 1/2, 1/3 and 1/4 the diameter of the Earth are, in order: 10. Most communications satellites are put in a __ orbit, which makes them appear station ...
... 8. Many people see interesting shapes when they look at the moon. They are seeing dark, flat areas called ___. 9. The solar system bodies that are about 1/2, 1/3 and 1/4 the diameter of the Earth are, in order: 10. Most communications satellites are put in a __ orbit, which makes them appear station ...
Practice Questions: This is a series of practice tests that you should
... 56. Which statement describes the galaxy we live in? a. Spiral galaxy called the Milky Way b. Irregular galaxy called Twilight c. Spiral galaxy called Twilight d. Elliptical galaxy called the Milky Way 57. The nucleus of a comet is composed primary of a. Iron b. Helium c. Ice d. dust The following f ...
... 56. Which statement describes the galaxy we live in? a. Spiral galaxy called the Milky Way b. Irregular galaxy called Twilight c. Spiral galaxy called Twilight d. Elliptical galaxy called the Milky Way 57. The nucleus of a comet is composed primary of a. Iron b. Helium c. Ice d. dust The following f ...
UV Radiation in Different Stellar Systems
... Soderblom & King (1998) defined “solar-like” as main sequence stars of spectral class F8V to K2V (or B-V within 0.50 to 1.00). Several extrasolar planets have been found around those types of stars, so an important point to study is whether they are suitable for life or not. Stellar luminosity and i ...
... Soderblom & King (1998) defined “solar-like” as main sequence stars of spectral class F8V to K2V (or B-V within 0.50 to 1.00). Several extrasolar planets have been found around those types of stars, so an important point to study is whether they are suitable for life or not. Stellar luminosity and i ...
THE LIBERAL ARTS AND SCIENCES The liberal arts and sciences
... Our sun is 4.5 billion years old. Humans as a species have been in existence for approx 150,000 years. The NASA space shuttle is the fastest manned vehicle ever – it would take it over 38,000 years to travel one light year travelling at 17,500 mph. ...
... Our sun is 4.5 billion years old. Humans as a species have been in existence for approx 150,000 years. The NASA space shuttle is the fastest manned vehicle ever – it would take it over 38,000 years to travel one light year travelling at 17,500 mph. ...
The Solar System 2015
... Saturn became famous by beauty of its bright rings. Regardless they have radius over 100,000 km, they are at most a few hundred metres thick. They look as a series of thousands of differently bright and differently transparent ringlets, but in reality they are composed of individual icy–stony fragme ...
... Saturn became famous by beauty of its bright rings. Regardless they have radius over 100,000 km, they are at most a few hundred metres thick. They look as a series of thousands of differently bright and differently transparent ringlets, but in reality they are composed of individual icy–stony fragme ...
Some facts and concepts to have at your fingertips.
... wavelengths if the object is moving away from the observer. These are called redshifts. • An object that shows emission or absorption lines will have lines shifted toward shorter wavelengths if the object is moving towards the observer. These are called blueshifts. • Cold atomic hydrogen gas (e.g., ...
... wavelengths if the object is moving away from the observer. These are called redshifts. • An object that shows emission or absorption lines will have lines shifted toward shorter wavelengths if the object is moving towards the observer. These are called blueshifts. • Cold atomic hydrogen gas (e.g., ...
Knight_ch12
... A planet has 4 times the mass of the earth, but the acceleration due to gravity on the planet’s surface is the same as on the earth’s surface. The planet’s radius is ...
... A planet has 4 times the mass of the earth, but the acceleration due to gravity on the planet’s surface is the same as on the earth’s surface. The planet’s radius is ...
From Big bang to lives on planets
... –About 85% of known exoplanets are detected by the technique –The Doppler method is sensitive to massive planets around relatively nearby stars Advantages of Transits –Transits offer the only way we currently have to make a direct measurement of the radii of exoplanets –Gives an estimate of the dens ...
... –About 85% of known exoplanets are detected by the technique –The Doppler method is sensitive to massive planets around relatively nearby stars Advantages of Transits –Transits offer the only way we currently have to make a direct measurement of the radii of exoplanets –Gives an estimate of the dens ...
Space Exam Review
... large chunks of ice, dust and rock that orbit the Sun (the orbit can take a few years to a hundred thousand years) (nicknamed “Dirty Snowballs”) can be 100m to 40 km in diameter o Short-period comets: originate from just beyond Neptune and orbit the Sun in less than 200 years (for example, Halle ...
... large chunks of ice, dust and rock that orbit the Sun (the orbit can take a few years to a hundred thousand years) (nicknamed “Dirty Snowballs”) can be 100m to 40 km in diameter o Short-period comets: originate from just beyond Neptune and orbit the Sun in less than 200 years (for example, Halle ...
Solar System Bead Distance Primary Audience
... Our Solar System is immense in size by normal standards. We think of the planets as revolving around the Sun, but rarely consider how far each planet is from the Sun. Furthermore, we fail to appreciate the even greater distances to the other stars. Astronomers use the distance from the Sun to the Ea ...
... Our Solar System is immense in size by normal standards. We think of the planets as revolving around the Sun, but rarely consider how far each planet is from the Sun. Furthermore, we fail to appreciate the even greater distances to the other stars. Astronomers use the distance from the Sun to the Ea ...
Unformatted file
... promising as regards the possibility of life_. It is of nearly the same size as the earth, and it has a good atmosphere, but there are many astronomers who believe that, like Mercury, it always presents the same face to the sun, and it would therefore have the same disadvantage—a broiling heat on th ...
... promising as regards the possibility of life_. It is of nearly the same size as the earth, and it has a good atmosphere, but there are many astronomers who believe that, like Mercury, it always presents the same face to the sun, and it would therefore have the same disadvantage—a broiling heat on th ...
UGS303, Extraterrestrial Life: REVIEW FOR FIRST TEST
... Why are ionic molecules, like HCO+ and N2H+, able to react with neutral molecules, like H2, and build more complicated molecules, whereas ordinary, neutral, molecules cannot do this in interstellar clouds? ...
... Why are ionic molecules, like HCO+ and N2H+, able to react with neutral molecules, like H2, and build more complicated molecules, whereas ordinary, neutral, molecules cannot do this in interstellar clouds? ...
THE PLANETS
... It is red because there is a lot of iron in the soil Mars year = 687 Earth days. Nighttime temperatures on Mars can drop as low as ...
... It is red because there is a lot of iron in the soil Mars year = 687 Earth days. Nighttime temperatures on Mars can drop as low as ...
Planet - Tasker Milward Physics Website
... together to make Helium. Lots of energy is released in the process as heat and light. ...
... together to make Helium. Lots of energy is released in the process as heat and light. ...
File
... solar system body made of rock and ice that orbits the sun May be chunks of frozen gas covered in gravel and dust ...
... solar system body made of rock and ice that orbits the sun May be chunks of frozen gas covered in gravel and dust ...
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.