• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
AN INTRODUCTION TO ASTRONOMY Dr. Uri Griv Department of Physics, Ben-Gurion University
AN INTRODUCTION TO ASTRONOMY Dr. Uri Griv Department of Physics, Ben-Gurion University

... near-infrared wavelengths the planet appears substantially darkened, improving the contrast between the otherwise relatively bright planet and the normally faint rings. In fact, the narrow Uranian rings are all but impossible to see in visible light with earthbound telescopes and were discovered onl ...
Lesson 2 For students of Geography, 2 course. Subject: THE EARTH
Lesson 2 For students of Geography, 2 course. Subject: THE EARTH

... the heat that keeps rocks in such a viscous or even molten state, and much of the earth’s interior is continuously in motion. The crust averages from 6 to about 25 miles (10 to 40 km) in thickness. The earth consists of a series of layers, with an extremely dense, heavy ball known as the inner core ...
Accelerated patterns in the solar system
Accelerated patterns in the solar system

... Purpose: To investigate the patterns of mass, density, and size of planets in the solar system and compare the terrestrial and giant planets. Background: Mass is a measure of the amount of matter an object contains. The masses of the planets on the Planet Data Table are given in relation to Earth’s ...
Comet: Small body of ice, rock, and cosmic dust loosely packed
Comet: Small body of ice, rock, and cosmic dust loosely packed

... Solar Eclipse: An eclipse in which the sun is obscured by the moon. Annular Eclipse: An eclipse of the sun in which the edge of the sun remains visible as a bright ring around the moon. Why don’t we have eclipses every new and full moon? If the Moon's orbit around the Earth were in the same plane a ...
music lessons (2) new
music lessons (2) new

... Well, we are done exploring the Solar System. I am thirsty. Let's explore the rest of the Milky Way Galaxy. 3.)Planets Song for Kids / Solar System Song ...
Teacher`s Show Guide
Teacher`s Show Guide

... Sun sets in our planetarium dome, we play "connect the dots" and observe a few of the more well-known constellations. But we notice that some points of light in the sky move over time. We look at our current planets visible from your yard tonight and then examine the changing phases of our Moon.. Em ...
File
File

... that 2002 LM60, an icy Kuiper belt object dubbed "Quaoar," by its discoverers, is the largest body found in the solar system since the discovery of Pluto 72 years ago. Quaoar (pronounced kwa-whar) is about half the size of Pluto. Like Pluto, Quaoar dwells in the Kuiper belt. ...
The Solar System - Henry County Schools
The Solar System - Henry County Schools

... the sun in elliptical (oval) orbits. http://www.solarsystemscope.com/ http://lasp.colorado.edu/education/outerplan ets/orbit_simulator/ • The planets in our solar system differ in size, composition (rock or gas), surface and atmospheric conditions, and distance from the sun. ...
File - Science Partnership
File - Science Partnership

... Satellite — any body in orbit around another larger body. At least 144 (depends on who’s counting) have been discovered in our solar system. Asteroid — a small planetary body composed mostly of rock or metal. Most asteroids are found in a belt between the orbits of Mars and Jupiter. Asteroids have d ...
The Ptolemaic Geocentric Universe
The Ptolemaic Geocentric Universe

11 planets in order 3
11 planets in order 3

... ...
The Outer Planets - Mr. Cramer
The Outer Planets - Mr. Cramer

... Four largest moons– Io – covered with large active volcanoes Europa – icy crust overs an ocean of liquid water Ganymede – largest in solar system, larger than Mercury or Pluto. • Callisto – icy and covered with craters • All are larger than Earth’s moon • Have discovered dozens of addition moons, mo ...
The Rings of Saturn…final remarks
The Rings of Saturn…final remarks

... gravitational force on the front and rear side of a moon near a planet. • If a moon gets closer to a planet than about 2.4 planetary radii, the tidal stresses pull the ...
To know that planets etc. move in elliptical orbits around the Sun.
To know that planets etc. move in elliptical orbits around the Sun.

... To understand named terminology with respect to planetary orbits. ...
Planet - Cobb Learning
Planet - Cobb Learning

... because they are made up Of rocks and metal. The rocks come in many sizes. Larger rocks are Asteroids. They are found in large areas between the orbits of Mars And Jupiter. (Called the Asteroid Belt) ...
Jeopardy
Jeopardy

... This planet has more water on the surface than any other planet (there are moons with more). ...
Tayler Vence PHYS 1010 5/5/2013 The Copernican Revolution The
Tayler Vence PHYS 1010 5/5/2013 The Copernican Revolution The

... This view of the galaxy and the universe survived unchallenged by any astronomer or physicist for over thirteen hundred years. In the early 16th century, it was finally challenged by the Polish astronomer Nicolaus Copernicus. Copernicus defied this known model of the universe with his Heliocentric m ...
FRIENDS OF THE PLANETARIUM
FRIENDS OF THE PLANETARIUM

... have cleared out its own unique orbital path. This means that most asteroids could never qualify as planets because many of them (1000’s in fact) share the same orbital path. It also means that Pluto can no longer be considered a planet as its orbit crosses the orbit of Neptune, albeit at a highly i ...
Mass
Mass

... Because the star is so close that we should have received radio signals from the planet years ago. C Because the radio signals cannot penetrate the Earth’s atmosphere from outer space. D Because we are able to hear radio waves, this should have been discovered long ago. *E Because massive blue giant ...
PH109 Exploring the Universe
PH109 Exploring the Universe

... d) Jupiter was not perfect but had moving clouds of gas. 2) When Galileo viewed the Moon, what discovery helped change our view of the solar system? a) Because the Moon rises in the East and sets in the West, its orbit must be opposite that of the planets. b) The Moon went through phases like Jupite ...
2 The Inner Planets Critical Thinking
2 The Inner Planets Critical Thinking

... Which Planet Is Closest to the Sun? Mercury is the planet closest to the sun. After Earth, it is the second densest object in the solar system. This is because, like Earth, Mercury has a large iron core in its center. The surface of Mercury is covered with craters. The atmosphere of Mercury is very ...
2 The Inner Planets Critical Thinking
2 The Inner Planets Critical Thinking

... Which Planet Is Closest to the Sun? Mercury is the planet closest to the sun. After Earth, it is the second densest object in the solar system. This is because, like Earth, Mercury has a large iron core in its center. The surface of Mercury is covered with craters. The atmosphere of Mercury is very ...
Getting to Know: Rotation, Orbits, and the Seasons
Getting to Know: Rotation, Orbits, and the Seasons

... Rotation involves one object in space. Orbits involve two or more objects. An orbit is the revolution of one astronomical body around another astronomical body. Earth orbits the Sun and the moon orbits Earth. Each of the planets in our solar system orbits the Sun. It takes Earth 365¼ days to complet ...
Solar System 09 - MrFuglestad
Solar System 09 - MrFuglestad

... • The core is probably composed mostly of iron (or nickel/iron) though it is possible that some lighter elements may be present, too. • Temperatures at the center of the core may be as high as 7500 K, hotter than the surface of the Sun. • We know most of this only from seismic ...
THE SIZE AND DISTANCE SCALE OF THE UNIVERSE
THE SIZE AND DISTANCE SCALE OF THE UNIVERSE

... inner part of the solar system travel, and may have originated in the early years of our solar system. • Surveys of the outer part of the solar system, beyond the orbit of Pluto, have recently found several additional objects comparable to Pluto in size. • Most recently, an object apparently larger ...
< 1 ... 221 222 223 224 225 226 227 228 229 ... 385 >

Late Heavy Bombardment



The Late Heavy Bombardment (abbreviated LHB and also known as the lunar cataclysm) is a hypothetical event thought to have occurred approximately 4.1 to 3.8 billion years (Ga) ago, corresponding to the Neohadean and Eoarchean eras on Earth. During this interval, a disproportionately large number of asteroids apparently collided with the early terrestrial planets in the inner Solar System, including Mercury, Venus, Earth, and Mars. The LHB happened after the Earth and other rocky planets had formed and accreted most of their mass, but still quite early in Earth's history.Evidence for the LHB derives from lunar samples brought back by the Apollo astronauts. Isotopic dating of Moon rocks implies that most impact melts occurred in a rather narrow interval of time. Several hypotheses are now offered to explain the apparent spike in the flux of impactors (i.e. asteroids and comets) in the inner Solar System, but no consensus yet exists. The Nice model is popular among planetary scientists; it postulates that the gas giant planets underwent orbital migration and scattered objects in the asteroid and/or Kuiper belts into eccentric orbits, and thereby into the path of the terrestrial planets. Other researchers argue that the lunar sample data do not require a cataclysmic cratering event near 3.9 Ga, and that the apparent clustering of impact melt ages near this time is an artifact of sampling materials retrieved from a single large impact basin. They also note that the rate of impact cratering could be significantly different between the outer and inner zones of the Solar System.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report