• 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
The Solar System
The Solar System

... observed more than 300 years ago. The Spot is an oval about 12,000 by 25,000 km, big enough to hold two Earths. ...
The Gas Giant Planets
The Gas Giant Planets

... hydrogen. It also contains methane, which gives it its bluish color. Seasons last over 20 years on Uranus. Scientists believe this is because it is tipped on its side. Like the other gas planets, ...
Our Huge Solar System
Our Huge Solar System

... extreme temperatures! • Mercury is a bare and rocky planet with deep craters. ...
Meteorites from Mars
Meteorites from Mars

... 5. Occasionally, a close encounter with inner planets abruptly changes the path. 6. Many of the objects eventually fall into the sun, collide with asteroids, or escape the solar system. 7. A small fraction of the fragments hits the Earth, 13,000 years ago, in Antarctica. Over 10 to 100 million years ...
PowerPoint 演示文稿
PowerPoint 演示文稿

... Stars are large balls of hot gas that produce light and heat through nuclear reactions. Our Sun is an average yellow star, but seems bright because it is so close. Planets are the largest objects that circle around the stars. They may be rocky, like the earth, or made mostly of gas and liquid, like ...
Best of the Solar System Handout.
Best of the Solar System Handout.

... over 300 km long, and up to 8 km deep. The three brown circles on the left are very large volcanoes about 300 km across, larger than any volcano on Earth. You cannot see as many craters on Mars as you can see on the Moon or Mercury. MARS - Viking Lander 1 View of the Surface This scene from the surf ...
AstroProjectDay3
AstroProjectDay3

... • that orbits a star • has sufficient mass to assume a spherical shape (it’s round) • has cleared its orbital path ...
The Solar System
The Solar System

... years • Gas Giant • Thin rings • Temp -220 degrees ...
Solar System - ppt
Solar System - ppt

... by the sun’s heat. They retained their lighter gases and grew to enormous sizes. These were called the Gas Giants or ______ Jovian planets. ...
homework assignment 1
homework assignment 1

... 3. Compare the size of an electron to the size of the universe. By what factor is the universe bigger? Approximately how many orders of magnitude is this? ...
File
File

... 1. Be in orbit around a star (such as the Sun) 2. Have enough mass to be pulled into a stable sphere shape by gravity 3. Dominate its orbit (i.e., its mass must be greater than anything else that crosses its orbit) ...
How is the pace of the course? Next: Introduction to the Solar
How is the pace of the course? Next: Introduction to the Solar

... It rises East and sets West It rises West and sets East It rises East and sets South It rises South and sets North It rises West and sets South ...
The Planets
The Planets

... roaring at up to 1500 kilometers per hour. • Large cyclonic “storms” similar to Jupiter’s Great Red Spot, although smaller, occur in Saturn’s ...
PHESCh23
PHESCh23

... roaring at up to 1500 kilometers per hour. • Large cyclonic “storms” similar to Jupiter’s Great Red Spot, although smaller, occur in Saturn’s ...
Document
Document

... predict the motion of the stars. • If we add epicycles and several other “fixes” it is possible to predict the motion of the planets. • Ptolemy’s geocentric model provided the most accurate predictions of celestial motion. It allowed people to navigate to distant parts. • The geocentric model is cum ...
supplemental educational materials PDF
supplemental educational materials PDF

... Unlike a planet, however, a dwarf planet shares its orbit with other objects of similar size. Dwarf planets include Ceres, Pluto, and Eris. ...
14 – 2 The Solar System Warm - Up
14 – 2 The Solar System Warm - Up

... 1. List the planets in order; include the asteroid belt. 2. What did Copernicus do? 3. What did Kepler do? 4. What is the difference between rotation and revolution? ...
Chapter 7: Our Planetary System Chapter 8: Formation of the Solar
Chapter 7: Our Planetary System Chapter 8: Formation of the Solar

... Midterm 2 Study Guide ...
8th Grade Midterm Test Review
8th Grade Midterm Test Review

... 13. Red and yellow stars have a relatively (hot or cool) temperature while blue and white stars have a relatively (hot or cool) temperature. ...
ppt
ppt

... remain solid except at very high temperature (>1000 K) • Jovian planets are composed mainly of light elements, hydrogen and helium • Jovian planets are gaseous (in the outer layers) or liquid (in the interior) , because hydrogen and helium are gaseous except at extremely low temperature and extraord ...
Comparative Planetology I: Our Solar System
Comparative Planetology I: Our Solar System

Open File
Open File

... when the Earth’s shadow falls on the moon because the Earth is between the moon and the sun ...
Solar System
Solar System

... miles from the sun. ...
Jeopardy
Jeopardy

... miles from the sun. ...
Part 2: Solar System Formation
Part 2: Solar System Formation

... another. If the collisions are not too violent material (planetesimals) may stick together. • In the outer parts of the Solar Nebula the planets become large enough to have a significant gravitational pull and collect gas around them. – Ice is ten times more abundant than silicates and iron compound ...
< 1 ... 335 336 337 338 339 340 341 342 343 ... 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