astr221lect2x
... • Length of an apparent solar day changes during the year because Earth’s orbit is slightly elliptical. • Mean solar time is based on the average length of a day. • Noon is average time at which Sun crosses meridian • It is a local definition of time ...
... • Length of an apparent solar day changes during the year because Earth’s orbit is slightly elliptical. • Mean solar time is based on the average length of a day. • Noon is average time at which Sun crosses meridian • It is a local definition of time ...
The Reason for the Seasons
... When our Northern Hemisphere tilts toward the Sun, we actually get nearly the most direct sunlight of anywhere on the planet! No wonder we get over 100 degrees so often in July & August! ...
... When our Northern Hemisphere tilts toward the Sun, we actually get nearly the most direct sunlight of anywhere on the planet! No wonder we get over 100 degrees so often in July & August! ...
NOVEMBER 2011 ASTRONOMY From the Trackman Planetarium at
... NOVEMBER 2011 ASTRONOMY From the Trackman Planetarium at Joliet Junior College ...
... NOVEMBER 2011 ASTRONOMY From the Trackman Planetarium at Joliet Junior College ...
Solar system and eclipse
... 5. There's a recurring myth that pregnant women can't go outside during an eclipse. Astronomers from the Griffith Observatory in LA say they get dozens of calls about it when an eclipse happens, even though it seems irrational. But if one of your friends is pregnant, don't worry, you can invite them ...
... 5. There's a recurring myth that pregnant women can't go outside during an eclipse. Astronomers from the Griffith Observatory in LA say they get dozens of calls about it when an eclipse happens, even though it seems irrational. But if one of your friends is pregnant, don't worry, you can invite them ...
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 ...
pdf format
... support the solar nebula hypothesis and are thought to be fragments of planetesimals • For this connection to be established, differentiation needed to occur in large asteroids • Fragmentation of these early large asteroids (planetesimals) through collisions created the stony and iron asteroids we s ...
... support the solar nebula hypothesis and are thought to be fragments of planetesimals • For this connection to be established, differentiation needed to occur in large asteroids • Fragmentation of these early large asteroids (planetesimals) through collisions created the stony and iron asteroids we s ...
Earth Science Exam Review 1
... A. Atoms split, decreasing the average size of atomic nuclei. B. Atoms fuse, increasing the average size of atomic nuclei. C. Atoms release electrons to form positive ...
... A. Atoms split, decreasing the average size of atomic nuclei. B. Atoms fuse, increasing the average size of atomic nuclei. C. Atoms release electrons to form positive ...
Practice Quiz Gravitation
... A) GM2/R2 B) GM2/2R2 C) GM2/4R2 D) 2GM2/R2 Answer: C 3) The moons of Mars, Phobos (Fear) and Deimos (Terror), are very close to the planet compared to Earth's Moon. Their orbital radii are 9,378 km and 23,459 km respectively. What is the ratio of the orbital speed of Phobos to that of Deimos? A) 0.2 ...
... A) GM2/R2 B) GM2/2R2 C) GM2/4R2 D) 2GM2/R2 Answer: C 3) The moons of Mars, Phobos (Fear) and Deimos (Terror), are very close to the planet compared to Earth's Moon. Their orbital radii are 9,378 km and 23,459 km respectively. What is the ratio of the orbital speed of Phobos to that of Deimos? A) 0.2 ...
Chapter 2 - AstroStop
... When a new “star” appeared in the sky during the 16th century, a Danish astronomer named Tycho Brahe (1546-1601) reasoned that the distance of the object may be determined by measuring the amount of parallax. ...
... When a new “star” appeared in the sky during the 16th century, a Danish astronomer named Tycho Brahe (1546-1601) reasoned that the distance of the object may be determined by measuring the amount of parallax. ...
Answers - Physics@Brock
... 11. The distance from the Earth to the Moon is about (a) 400 km. (b) * 400,000 km. (c) 400,000,000 km. (d) 400,000,000,000 km. 12. The universe is believed to have an age of about (a) 14 thousand years. (b) 14 million years. (c) * 14 billion years. (d) 14 trillion years. 13. The planets change their ...
... 11. The distance from the Earth to the Moon is about (a) 400 km. (b) * 400,000 km. (c) 400,000,000 km. (d) 400,000,000,000 km. 12. The universe is believed to have an age of about (a) 14 thousand years. (b) 14 million years. (c) * 14 billion years. (d) 14 trillion years. 13. The planets change their ...
Answer - Physics@Brock
... 11. The distance from the Earth to the Moon is about (a) 400 km. (b) 400,000 km. (c) 400,000,000 km. (d) 400,000,000,000 km. 12. The universe is believed to have an age of about (a) 14 thousand years. (b) 14 million years. (c) 14 billion years. (d) 14 trillion years. 13. The planets change their pos ...
... 11. The distance from the Earth to the Moon is about (a) 400 km. (b) 400,000 km. (c) 400,000,000 km. (d) 400,000,000,000 km. 12. The universe is believed to have an age of about (a) 14 thousand years. (b) 14 million years. (c) 14 billion years. (d) 14 trillion years. 13. The planets change their pos ...
Document
... little different. • Now however, there is enough mass that it becomes hot enough to fuse carbon? • Hot enough to eventually fuse lots of elements. ...
... little different. • Now however, there is enough mass that it becomes hot enough to fuse carbon? • Hot enough to eventually fuse lots of elements. ...
58KB - NZQA
... planetary body that was in the same orbit round the sun. The collision occurred because the smaller planetary body was travelling faster than Earth. This collision caused both planets to melt and the outer layers of both planets to be ejected into space. A disk of orbiting material was formed and th ...
... planetary body that was in the same orbit round the sun. The collision occurred because the smaller planetary body was travelling faster than Earth. This collision caused both planets to melt and the outer layers of both planets to be ejected into space. A disk of orbiting material was formed and th ...
Pluto_Friends
... (1) A “planet” is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit. (2) A “dwarf planet” is a cele ...
... (1) A “planet” is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighbourhood around its orbit. (2) A “dwarf planet” is a cele ...
SOLAR SYSTEM OVERVIEW - Ms. Ferebee`s Webpage
... possible to learn everything there is to know about reality. Aristotle believed that the Earth went through processes that were so gradual or slow that they were not observed. He believed that the Earth did not move. He estimated the distance of the moon and the sun. Aristotle believed that the worl ...
... possible to learn everything there is to know about reality. Aristotle believed that the Earth went through processes that were so gradual or slow that they were not observed. He believed that the Earth did not move. He estimated the distance of the moon and the sun. Aristotle believed that the worl ...
ASTR-1020: Astronomy II Course Lecture Notes - Faculty
... e) There is no magic going on here, just chemistry being powered by an energy source (i.e., the Sun). Mutations from cosmic rays and the UV radiation from the Sun cause further alterations to these long molecule chains =⇒ variation in lifeforms begin on Earth. Natural selection begins in earnest cau ...
... e) There is no magic going on here, just chemistry being powered by an energy source (i.e., the Sun). Mutations from cosmic rays and the UV radiation from the Sun cause further alterations to these long molecule chains =⇒ variation in lifeforms begin on Earth. Natural selection begins in earnest cau ...
Chapter 10
... back to when they first condensed from the solar nebula • Some chondrules contain ancient dust grains that have survived from before the Solar System’s birth! ...
... back to when they first condensed from the solar nebula • Some chondrules contain ancient dust grains that have survived from before the Solar System’s birth! ...
Objection (Parallax)
... The biggest problem of studying Greek astronomy is the lack of the original works ...
... The biggest problem of studying Greek astronomy is the lack of the original works ...
PowerPoint Presentation - AY 4: The Stars
... • Homework questions will be assigned and some of the quiz questions will taken from the homeworks. • Optional final. ...
... • Homework questions will be assigned and some of the quiz questions will taken from the homeworks. • Optional final. ...
![Question 6 [11]](http://s1.studyres.com/store/data/002362724_1-d28e5e3b5fe7e9e2fc1d9f01e4127b67-300x300.png)
Question 6 [11]
... 11.1. In cell D23, calculate the distance between Earth and Mars (remember that distance is normally shown as a positive value) 11.2. In cell D24, determine the shortest distance to the sun (distance from the sun of the planet closest to the sun) 11.3. In cell D25, calculate the circumference (C) of ...
... 11.1. In cell D23, calculate the distance between Earth and Mars (remember that distance is normally shown as a positive value) 11.2. In cell D24, determine the shortest distance to the sun (distance from the sun of the planet closest to the sun) 11.3. In cell D25, calculate the circumference (C) of ...
Chapter 7 Earth in Space.
... – Only traveled 20% of orbit since discovery in 1930. – 3 moons. • Charon = largest ...
... – Only traveled 20% of orbit since discovery in 1930. – 3 moons. • Charon = largest ...
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.