• 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 University of the State of New York
The University of the State of New York

... At that very moment, unknown to the audience, an asteroid named Hermes halfway between Mars and Jupiter was beginning a long plunge toward our planet. Six months later it would pass 300,000 miles from Earth’s orbit, only a little more than the distance to the Moon…. Hermes approaches Earth’s orbit t ...
Lecture 13 - Seattle Central College
Lecture 13 - Seattle Central College

... Dwarf planets have squished themselves spherical but have not cleared their orbital paths of stuff The Kuiper belt: The stuff in Pluto’s path Icy (frozen volatiles) bodies arranged in a doughnut shape from 30-(100) AU ...
File
File

... The average distance from the Earth to the Sun is also called 1 astronomical unit (or AU). This is established as 149, 597, 870.7 kilometers (92,955,887.6 miles). ...
Why do we have seasons?
Why do we have seasons?

power point file
power point file

... The Acceleration of Gravity • As objects fall, they accelerate. • The acceleration due to Earth’s gravity is 10 m/s each second, or g = 10 m/s2. • The higher you drop the ball, the greater its velocity will be at impact. • Gravity of the moon is 1/6 as much..on Mars its 1/3… • Why? ...
What Processes Shape Planetary Surfaces
What Processes Shape Planetary Surfaces

... What Processes Shape Planetary Surfaces? 1. What was the first mission to explore a planet other than Earth or the moon? When did this occur, and which planet did it visit? ...
Our Solar System
Our Solar System

...  Which theory would you side with if you had to choose?  What would happen without the sun? ...
Section 23.3 The Outer Planets
Section 23.3 The Outer Planets

...  Large cyclonic “storms” similar to Jupiter’s Great Red Spot, although smaller, occur in Saturn’s atmosphere. ...
movement in the solar system
movement in the solar system

1 Patterns in the Solar System (Chapter 18)
1 Patterns in the Solar System (Chapter 18)

... The orbit of the icy, dwarf planet Pluto is inclined 17˚ to the plane of the ecliptic. When compared to the eight major planets, Pluto’s orbit is more elliptical and tilted (very little, similar to the major planets, or very much) (Pick One): ...
Ancient Astronomy
Ancient Astronomy

... speeds increase at the same rate (9.8 m/s every second). • Built telescopes and used them to observe the Sun, Moon, and planets. • Wrote a book that was influential in undermining confidence in the geocentric model of the universe, and got him into serious trouble with the Church. ...
File
File

... the comet melts, sometimes large chunks of ice break off in a hurry and large amounts of gases escape at once and cause a bright “outburst”. The gas and dust are released and form an atmosphere around the comet called the coma. ...
The Sun Our sun is a star. It is the star we see in the daytime. It is the
The Sun Our sun is a star. It is the star we see in the daytime. It is the

... In ancient times, people did not have telescopes. When they wanted to know what’s there in the sky, they had just their eyes to use. They could only see the objects close to Earth. When telescopes were invented, astronomers could see much more. In 1977, some special spaceships (Voyager 1 and Voyager ...
Gravitation Simulation Lab
Gravitation Simulation Lab

... Background: According to Newton's Universal Law of Gravitation, the mass of an object, its distance from another object, and the mass of the other object all affect the magnitude of the gravitational force between them. For an object to maintain a stable orbit around another, it must have enough hor ...
Astronomy 212 EXAM 1 2000 September 29 Answer
Astronomy 212 EXAM 1 2000 September 29 Answer

... B takes 20 years to orbit the Sun then planet B is twice as far from the Sun as planet A. 18. Newton’s second law states that the speed of an object is proportional to the force and inversely proportional to its mass. 19. If the size of the Earth were to double (with the mass unchanged) there would ...
Study Guide
Study Guide

Revolutions of Earth
Revolutions of Earth

... Galileo also discovered that Venus has phases like the Moon (Figure 1.3), which provides direct evidence that Venus orbits the Sun. Galileo’s discoveries caused many more people to accept the heliocentric model of the universe, although Galileo himself was found guilty of heresy. The shift from an E ...
Chapter 22
Chapter 22

... Properties of the Sun • An average size yellow star • fairly cool compared to other stars • diameter is approx. 110 times larger than Earth’s, with a volume that hold more than 1,000,000 Earths. (yes, that’s one million!!!) • Light traveling from the sun takes approx. 8 minutes 20 seconds to reach ...
Extrasolar Planets: The (more or less) Standard Theory for Planet
Extrasolar Planets: The (more or less) Standard Theory for Planet

Planetary system
Planetary system

... grains of dust back and forth past larger grains causing them to stick together via static electricy. Creating clumps the size of pebbles and then boulders which are less susceptible to being pushed around by the gas. ...
Today in Astronomy 111: asteroids, perturbations and orbital
Today in Astronomy 111: asteroids, perturbations and orbital

... Distance above ecliptic (AU) ...
Concepts - Waterbury Public Schools
Concepts - Waterbury Public Schools

... • Brainstorm what they know about the planets and the distances between them. • Use a set of scaled items to model the solar system. • Explore the relative diameters of, and distances between, the planets and the Sun. ...
1 Patterns in the Solar System (Chapter 18)
1 Patterns in the Solar System (Chapter 18)

... Considering the nebular origin of the solar system, suggest a reason why the orbits of the planets are nearly all on the same plane of the ecliptic. In other words, think about the way in which the solar system formed and describe any aspects or characteristics that may have caused the planets to be ...
Astro 10: Introductory Astronomy
Astro 10: Introductory Astronomy

... Some General Features of Our Solar System • Inner planets – Mercury, Venus, Earth, Mars – • --small • -- made almost completely of rock • -- no natural moons or rings • -- thin (or no) atmospheres, mostly of carbon dioxide (except Earth). ...
Earth`s rotation?
Earth`s rotation?

... away from the Earth’s 23.5 degrees. • Most of planets also rotate in an eastward direction, but three of them (Venus, Uranus and Pluto) rotate to the west. ...
< 1 ... 200 201 202 203 204 205 206 207 208 ... 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