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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: 238

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?

Ranking wavelength and energy

I need a simple list for the following: I. Rank in energy from highest to lowest (x-ray, visible, radio, ultraviolet, infrared) II. Rank according to wavelength shortest to longest (x-ray, visible, radio, ultraviolet and infrared) Thank you in advance!

Considerations When Constructing an Observatory

I'm trying to construct (hypothetically) a new optical observatory, and money is no object. Other than putting it into space, what factors will affect my decision for its location on Earth? Altitude, close to equator, desert location, etc.?

Freefall Concepts and Calculations

Why do two objects of unequal mass, if dropped from rest and from the same height, land at the same time? How long will it take a 150 lb man to fall to the earth if dropped from 50 ft?

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

Sunspot Activity

Given the unpredictability of sunspot activity and its ability to virtually shut down for extended periods of time, do you feel it is necessary to study sunspot activity? Why?

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

Weight and Acceleration

1. A ball is dropped from a tree. How many feet does the ball drop in 0.43 seconds? 2. The gasoline consumption of a small car is 27 kilometers per liter. How many miles per gallon is this? 3. If a car is moving at 19 meters per second, how many miles has it gone in 2 hours? 4. On Mars, the acceleration due to gravity

Height Questions, Etc.

1) Women in the age group 19 to 22 have an average height of 5 feet. What is this height in meters? 2) Convert 50 KM/ hr to m/s. 3) A car is traveling at 75 MPH and comes to a stop in 600 feet in 2 seconds. What is the car's acceleration in m/s^2? NOTE: m/s^2 means meters per second squared. 4) On Mars, gravity

Physics: Force Problem

It gets very windy along St. Georges Terrace in Perth and there are several old buildings along the road so their windows should be checked regularly to make sure they do not pop out due to the pressure differential caused by the wind outside the window. Suppose outside the building the wind has laminar flow and a speed of 11.2

step by step solution needed

Assume that the interior of the earth can be treated as an incompressible fluid in equilibrium. Let ? denote the density; take ? to be a constant; ? = M/V. a.) What is the pressure within the earth p(r) as a function of distance from the center r? b.) What is the pressure at the center, expressed in tons per square inch?

Spacecraft from Earth to Sun

For a spacecraft going from the Earth toward the Sun, at what distance from the Earth will the gravitational forces due to the Sun and the Earth cancel out? [The mass of the Earth is 5.98 x 10 24 kg. The mass of the Sun is 1.99 x 10 30 kg. The Earth-Sun distance is 1.50 x 10 11 m.] Please provide detailed explanation and

Physics: use of nuclear power on a satellite

Why use nuclear power on a satellite? (select all answers that apply) it can supply energy for many years on long space missions. solar cells don't work well in the outer solar system far from the sun. sending radioactive materials into space is a good way to get rid of them so they don't create a hazard on earth.

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

Newton's Law of Universal Gravitation

Imagine a line drawn from the center of the earth to the center of the moon. At some point on this line the magnitude of the gravitational attraction of the moon on a space vehicle would be equal to the magnitude of the earth's gravitational attraction on the vehicle. If the distance from the earth to the moon is about 4.0 x 10^

Age of brother on earth after one year trip in a spaceship

You have the opportunity to ride in a Klingon hyperdrive spaceship that cruises at 0.9 the speed of light. Its engines are so powerful that it accelerates from rest to cruising speed in just 5s. Using advanced spacewarp technology, the occupants of the spaceship easily tolerate the resulting acelerations. Your 25-year-o

Newton's Law of Gravitation: Force and Gravity

1. A rocket lifts off the pad at Cape Canaveral. According to Newton's Law of Gravitation, the force of gravity on the rocket is given by F(x)= -GMm/x^2 Where M is the mass of the earth, m is the mass of the rocket, G is a universal constant, and x is the distance between the rocket and the center of the earth. Take the radiu

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.