Motions of the Earth and Sky. Seasons, Eclipses
... • Distance in light travel time @ 300,000 km/sec • Moon is 2 light seconds away • Sun is 8 light minutes away • Solar system is ~1 light day across • Nearest star is 4 light years away • Milky Way Galaxy is ~100,000 light years across • Andromeda Galaxy – nearest galaxy like our own – is 2 million l ...
... • Distance in light travel time @ 300,000 km/sec • Moon is 2 light seconds away • Sun is 8 light minutes away • Solar system is ~1 light day across • Nearest star is 4 light years away • Milky Way Galaxy is ~100,000 light years across • Andromeda Galaxy – nearest galaxy like our own – is 2 million l ...
The Newtonian Revolution: The discovery of natural law
... Interesting - Aristarchus in ~600BC first deduced the planets orbited the sun, not the Earth • His reasoning is not known – original writings were lost when the great Library of Alexandria was burned by religious zealots • The Greeks had no authoritarian religious problem with a sun-centered univer ...
... Interesting - Aristarchus in ~600BC first deduced the planets orbited the sun, not the Earth • His reasoning is not known – original writings were lost when the great Library of Alexandria was burned by religious zealots • The Greeks had no authoritarian religious problem with a sun-centered univer ...
Name Date ______ Period _____ Earth Science Chapter 25 Study
... A(n) ____________________ is a developing star not yet hot enough to engage in nuclear fusion. Stars that radiate short pulses of radio energy are called ____________________. The most dense stars known to exist are called ___________. The average star spends ____________________ percent of its life ...
... A(n) ____________________ is a developing star not yet hot enough to engage in nuclear fusion. Stars that radiate short pulses of radio energy are called ____________________. The most dense stars known to exist are called ___________. The average star spends ____________________ percent of its life ...
Sacred Fire – Our Sun - University of Louisville
... ● Kepler’s laws describe common features of the motions of orbiting objects, including their elliptical paths around the sun. Orbits may change due to the gravitational effects from, or collisions with, other objects in the solar system. (HSESS1-4) ● Cyclical changes in the shape of Earth’s orbit ar ...
... ● Kepler’s laws describe common features of the motions of orbiting objects, including their elliptical paths around the sun. Orbits may change due to the gravitational effects from, or collisions with, other objects in the solar system. (HSESS1-4) ● Cyclical changes in the shape of Earth’s orbit ar ...
Exam 1 - UGA Physics
... 5. 100 (10 to the power 0) is (b) 1 6. What is the approximate angular diameter of the Sun in arcseconds? (d) 1860 7. The average distance from Earth to the Sun, 149,600,000 km, can be written in scientific notation as (b) 1.496 × 108 km 8. Consider the angular diameter of the planet Saturn as viewe ...
... 5. 100 (10 to the power 0) is (b) 1 6. What is the approximate angular diameter of the Sun in arcseconds? (d) 1860 7. The average distance from Earth to the Sun, 149,600,000 km, can be written in scientific notation as (b) 1.496 × 108 km 8. Consider the angular diameter of the planet Saturn as viewe ...
Announcements Ancient astronomers: Why did they do it? Why did
... Kepler’s Third Law 3. The ratio of the cube of a planet’s average distance from the Sun to the square of its orbital period is the same for each planet. ...
... Kepler’s Third Law 3. The ratio of the cube of a planet’s average distance from the Sun to the square of its orbital period is the same for each planet. ...
wdtoc1
... Telescopes have revealed a wealth of lunar detail since their invention in the 17th century, and spacecraft have contributed further knowledge since the 1950s. Earth’s Moon is now known to be a slightly egg-shaped ball composed mostly of rock and metal. It has no liquid water, virtually no atmospher ...
... Telescopes have revealed a wealth of lunar detail since their invention in the 17th century, and spacecraft have contributed further knowledge since the 1950s. Earth’s Moon is now known to be a slightly egg-shaped ball composed mostly of rock and metal. It has no liquid water, virtually no atmospher ...
Lecture 2 - U of L Class Index
... • Many cultures throughout the world practiced astronomy. • They made careful observations of the sky. • Over a period of time, they would notice the cyclic motions of: ...
... • Many cultures throughout the world practiced astronomy. • They made careful observations of the sky. • Over a period of time, they would notice the cyclic motions of: ...
Homework Problems for Quiz 1 – AY 5 – Spring 2013
... 12. If a red star and a blue star both have the same radius and both are the same distance from the Earth, which one is brighter in the sky? The blue star produces more energy per unit surface area than the red star based on Stephan’s Law. If the two stars have the same radius, they have the same su ...
... 12. If a red star and a blue star both have the same radius and both are the same distance from the Earth, which one is brighter in the sky? The blue star produces more energy per unit surface area than the red star based on Stephan’s Law. If the two stars have the same radius, they have the same su ...
The Solar System
... • Halley’s comet is perhaps the most popular comet. It passes by every 76 years. Its last pass occurred in 1986, so expect to see it again in 2061! ...
... • Halley’s comet is perhaps the most popular comet. It passes by every 76 years. Its last pass occurred in 1986, so expect to see it again in 2061! ...
Space Test: Practice Questions and Answers 1. Who discovered
... 19. How are the surfaces of early planets heated? a. Asteroids b. Volcanoes c. The sun d. Solar flares 20. In redshift, the light’s wavelength… a. Get bigger b. Gets smaller c. Doesn’t change d. Goes away compl ...
... 19. How are the surfaces of early planets heated? a. Asteroids b. Volcanoes c. The sun d. Solar flares 20. In redshift, the light’s wavelength… a. Get bigger b. Gets smaller c. Doesn’t change d. Goes away compl ...
2-The Earth in space
... A star is a huge ball of superheated gases. The sun is a star that is at the center of our solar system. -The sun sometimes has dark spots called sunspots on its surface. They do not give off as much light and heat energy as the rest of the sun’s surface. -A galaxy is a huge system of gases, dust, a ...
... A star is a huge ball of superheated gases. The sun is a star that is at the center of our solar system. -The sun sometimes has dark spots called sunspots on its surface. They do not give off as much light and heat energy as the rest of the sun’s surface. -A galaxy is a huge system of gases, dust, a ...
Transcript - Cheap Astronomy
... Presumably to avoid any such complications, Copernicus arranged for the posthumous publication of his book On the Revolutions of the Heavenly Spheres in 1543, being the same year in which he died. Not so lucky was Giordano Bruno who was burned at the stake in 1600 after voicing the view that not onl ...
... Presumably to avoid any such complications, Copernicus arranged for the posthumous publication of his book On the Revolutions of the Heavenly Spheres in 1543, being the same year in which he died. Not so lucky was Giordano Bruno who was burned at the stake in 1600 after voicing the view that not onl ...
tata-surya
... How did the Solar System form? Any theory of the solar system formation must account for the obvious features we see, such as 1) the fact that solar system is a fairly flat place, with all the planets within a few degrees of the ecliptic and revolving in roughly circular oribts that are all goin ...
... How did the Solar System form? Any theory of the solar system formation must account for the obvious features we see, such as 1) the fact that solar system is a fairly flat place, with all the planets within a few degrees of the ecliptic and revolving in roughly circular oribts that are all goin ...
Rare Earth hypothesis
In planetary astronomy and astrobiology, the Rare Earth Hypothesis argues that the origin of life and the evolution of biological complexity such as sexually reproducing, multicellular organisms on Earth (and, subsequently, human intelligence) required an improbable combination of astrophysical and geological events and circumstances. The hypothesis argues that complex extraterrestrial life is a very improbable phenomenon and likely to be extremely rare. The term ""Rare Earth"" originates from Rare Earth: Why Complex Life Is Uncommon in the Universe (2000), a book by Peter Ward, a geologist and paleontologist, and Donald E. Brownlee, an astronomer and astrobiologist, both faculty members at the University of Washington.An alternative view point was argued by Carl Sagan and Frank Drake, among others. It holds that Earth is a typical rocky planet in a typical planetary system, located in a non-exceptional region of a common barred-spiral galaxy. Given the principle of mediocrity (also called the Copernican principle), it is probable that the universe teems with complex life. Ward and Brownlee argue to the contrary: that planets, planetary systems, and galactic regions that are as friendly to complex life as are the Earth, the Solar System, and our region of the Milky Way are very rare.