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Solar System

Our solar system consists of 8 planets and their moons. These masses orbit around the sun and other large non-stellar objects. Our solar system was formed 4.6 billion years ago. This formation occured from the gravitational collapse of a large molecular cloud. The solar system is located within an outer arm of the Milky Way galaxy. This galaxy contains about 200 billion stars.

The sun is the largest object in our solar system. The closest planets to the sun are the four smallest plants. These plants are Mercury, Venus, Earth and Mars. They are referred to as the terrestrial plants because they are made up of rock and metal.

The four furthest planets from the sun are referred to as the gas giants. Jupiter and Saturn are the largest planets. They are made of primarily Hydrogen and Helium. The two furthest most planets are Uranus and Neptune which are composed primary of substances with high melting points, which are called ices. Uranus and Neptune are sometimes called “ice giants”.

All of the planets orbit the sun in a flat disc like rotation plane called the ecliptic plane. Each planet orbits at a different speed. It takes the Earth one year to orbit completely around the sun. The orbits are what dictates time in the universe. 

The solar system does contains regions populated by smaller objects such as the asteroid belt, Kuiper belt and scattered disc. These regions contain several objects.Some of the objects are large enough to be rounded by their own gravity.

Categories within Solar System

Planets

Postings: 239

A planet is an object orbiting a star or stellar remnant that is large enough to be rounded by its own gravity.

Asteroids

Postings: 34

Asteroids are minor planets that are not comets.

The total mass And size of the Milky Way Galaxy

What is the total mass and total size of the Milky Way Galaxy? Is it possible to determine these large quantities even if we've never been able to look at ourselves from beyond our galactic borders? What methods do we use in order to get our calculations, and how accurate do we believe that they are?

Coefficient of friction, momentum, speed and distance

I have some physics questions: 1. It takes a force of 300 N to keep a 500-N box sliding across a floor. What is the coefficient of the sliding friction? 2. A force acting on a 5.0-kg body increases its speed uniformly from 2.0m/s to 8.0m/s in 3 s. What is the initial momentum of the body? What is the final momentum of th

Velocity and Distance Questions

1) A car is traveling at 48.55 MPH. How fast is that in m/s? 2) The average distance for a field goal in the NFL over the past 5 years is 25.19 yards. what is this distance in meters? 3) A car rolls off the edge of the Grand Canyon with a velocity of 20.99 m/s. How far in meters from the edge has it traveled in 1.88 seco

Velocity, Force, and Acceleration

(1) Evil Kneivel rides his motorcycle off the rim of the Snake River Canyon at a horizontal velocity of 52 meters per second. How far away from the edge will he have traveled in 0.29 seconds? NOTE: Assume he does not hit bottom. (2) Evil Kneivel rides his motorcycle off the rim of the Snake River Canyon at a horizontal velocity

Mass, Pressure and Area

A force of 1.05x 10^3 N is required to lift an object that is under the influence of an acceleration due to gravity of 7.76ft/sec^2. What is the object's mass in kilograms? A waterbed mattress has the following dimensions: 210 cm X 160 cm X 23 cm. The density of water is 62.4 lb/ft^3. What is the weight of the bed in pound

Gravitational force in an arrangement of four spheres

Four spheres, labeled 1, 2, 3 and 4, are arranged as shown in the figure (in the attachment). The spheres interact with each other through gravitational forces. They are far from the surface of the Earth and any other massive bodies. Spheres 2, 3 and 4 have the same distance d from the sphere 1; the masses are m1 = m2 = m3 =

historical moon landing summary

How is the historical moon landing changed our scientific understanding and how this event added to or changed our understanding of science.

Shepherd satellites of Saturn

How many moons does Saturn have? What is the name of Saturn's largest moon? What is special about this moon? What are the names of Saturn's 6 medium sized moons? What is special about Enceladus and Iapetus? What are Shepherd moons and what purpose do they serve? These questions are answered

Discussion of the Ptolemaic Model of the Solar System

Was the Ptolemaic model geo- or heliocentric? Explain. How did Ptolemy and others before him account for retrograde motion (epicycle and deferent)? What is the most basic explanation for why this complicated theory could not possibly be correct?

The Sun, its evolution as a star, and its presence in its life cycle

I have been waiting for any form of assistance for days now. I have revised the deadline for two days with no avail. My clock is running out & I have nothing but more confusion from trying to research extensively on the internet. Is there anyone who can help me? My paper is due in a few hours and I am really struggling with the

Physics: Vectors, Trigonometry, Means of components

Conceptual Questions: Are two vectors with the same magnitude necessarily equal? Can two zero perpendicular vectors be added together so their sum is zero? Can three or more vectors with unequal magnitudes be added together so their sum is zero? If so, show by means of a tail-to-head arrangement of the vectors how cou

Its about time - a discussion of time's nature

Before humans can seriously travel in time, that is extensively backward and forward, we need to first figure out what exactly "time" is. Anyone has a suggestive explanation on what "time is"? Please use at least one suitable site to support the answer (please don't use Wikpedia) Please provide the website(s) you use.

Astronomy Solar System Scales

1. If the Solar System were 10cm across, how big would the Milky Way galaxy be on that scale? Use the orbit of Neptune as the outer edge of the Solar System.

Moon

1. The phase of the Moon when it is aligned with the Sun in the sky is called the _____ Moon. Full Last Quarter First Quarter New 2. The phase of the Moon when it is located 180 degrees from the Sun is called the _____ Moon. Full Last Quarter First Quarter New 3. The phase of the Moon when

Celestial Sphere Problems

Question 1 What is the name of the point in space where the Sun appears to cross the celestial equator from South to North? __________ __________ Question 2 On what date does the Sun appear to cross the point on the celestial equator in Question 1? Question 3 What are the Sun's right ascension and declinati

Physics: Maximum Range of a Projectile

A projectile being fired upward at an angle to the horizontal, θ. You are to program the spreadsheet Excel (a similar substitute software program is permissible) to determine the maximum injection angle, θmax , that will result in the greatest downrange distance, R. Assume vo = 10 m/s and g is approximated as g = 10

Physics: Currents and Magnetic Fields

Please help with the following physics problems. 1. The current that flows through an incandescent light bulb immediately after it is turned on is higher than the current that flows moments later. Why? 2. The Earth's magnetic field lines are not parallel to its surface except in certain places. They actually "dip" downwar

Perfect spring, spider silk, pendulum, energy of climber

For a "perfect" spring, the force applied to the spring as a function of amount of stretch is shown below. The work done is the area under the curve. Show that for an amount of stretch x, the work done is: W =1/2kx^2 The easiest way is to use the diagram and the relation F = kx. (Note: you have seen the equation F

Four problems on mechanics

Please help with the following problems. 1. A car starts from rest and reaches a speed of 31m/s in 2 seconds. Calculate its acceleration, if this value stays the same then what it the speed 7 seconds later? 2. A ball is thrown off a very tall building with a velocity of 16 m/s. What is the speed of the ball after 1.1 seco

Haley's comet orbits the sun every 76 years, and was first observed in 240bce.

Haley's comet orbits the sun every 76 years, and was first observed in 240bce. Its orbit is highly elliptical, so that its closest approach to the sun (perihelion) is only 0.587 AU, while at its greatest distance (aphelion), the comet is 34.39 AU from the sun. (An AU, or astronomical unit, is the distance from earth to the sun,

Astronomy is the most ancient science.

Astronomy is the most ancient science. Discuss how the development of astronomy is interrelated with the development of civilization. Some possible relationships include astrology, the names of constellations, calendars, and the basic ideas of mankind's place in the universe.

Drilling a Hole

Although human beings have been able to fly hundreds of thousands of miles into outer space, getting inside the earth has proven much more difficult. The deepest mines ever drilled are only about 10 miles deep. To illustrate the difficulties associated with such drilling, consider the following: The density of steel is about

right ascension and declination of the point in the sky

Question 1 What are the right ascension and declination of the point in the sky where the ecliptic and the celestial equator intersect in March each year? The Sun crosses this point from the Southern Hemisphere to Northern Hemisphere in the sky. R.A. = _____ H _____ M Declination = __________ degrees __________ minut

Energy of a Hammer Dropped on Earth

For a hammer dropped on earth, the initial gravitational potential energy is 60.0 J. What would be the initial gravitational potential energy for the hammer on the moon (where the acceleration due to gravity is 1.67 m/s(squared) if it is released from the same height in both places? U(moon)= ?J What would be the initi