Solar system, assemblage consisting of
the Sun—an average star in the Milky Way Galaxy
—and those bodies orbiting around it: 8 (formerly 9) planets with about 170 known planetary satellites (moons); countless asteroids, some with their own satellites; comets and other icy bodies; and vast reaches of highly tenuous gas …
What are the compositions of solar system?
The Solar System. Our solar system consists of
an average star we call the Sun, the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto
. It includes: the satellites of the planets; numerous comets, asteroids, and meteoroids; and the interplanetary medium.
What was the original model of the solar system?
Later, Heraclides (330 B.C.) developed the first Solar System model, placing the planets in order from the Earth it was is now called the
geocentric solar system model
.
What was the original source of the material from which the solar system is derived?
About 4.6 billion years ago our solar system formed from
a cloud of gas and dust
which slowly contracted under the mutual gravity of all of its particles. The cloud was made largely of hydrogen (H) with some helium (He) and small amounts of the remaining naturally occurring chemical elements.
What are the 3 composition of the solar system discuss each composition?
Sun: 99.85%, Planets: 0.135%, Comets : 0.01%
, Satellites: 0.00005%, Minor Planets : 0.0000002%, Meteoroids: 0.0000001% and Interplanetary Medium: 0.0000001%.
What are the 14 planets in our solar system?
- Mercury. Mercury—the smallest planet in our solar system and closest to the Sun—is only slightly larger than Earth’s Moon. …
- Venus. Venus spins slowly in the opposite direction from most planets. …
- Earth. …
- Mars. …
- Jupiter. …
- Saturn. …
- Uranus. …
- Neptune.
Which is the only planet that can sustain life?
Nonetheless,
Earth
is the only place in the Universe known to harbor life.
Who discovered the solar system?
The main idea of the solar system was proposed by
the Polish astronomer Nicolaus Copernicus
(1473-1543) who said that “the Sun is the center of the Universe” and made the planets move around it in perfect circles (in his book entitled, “On the Revolution of the Celestial Spheres”, written in Latin and published in 1543 …
When was the solar system created?
The Sun and the planets formed together,
4.6 billion years ago
, from a cloud of gas and dust called the solar nebula. A shock wave from a nearby supernova explosion probably initiated the collapse of the solar nebula.
What are the two types of solar system models?
Geocentric and Heliocentric Models
. Modeled the movements of the Sun, the Moon, and the five known planets (Mercury, Venus, Mars, Jupiter, and Saturn) in the skies to great accuracy, with a geocentric system of orbits and epicycles.
Is Earth in a nebula?
The Earth was formed from the nebula that produced the Solar System
. It is almost universally accepted that the Sun, the planets and their satellites, the asteroids, and the comets of the Oort ‘cloud’ grew from a cloud of gas and dust that contracted under its own gravity.
What’s the oldest planet?
PSR B12620-26 b
The exoplanet known as PSR B12620-26 b is the oldest known planet in the universe, with an estimated age of about 13 billion years.
How old is our galaxy?
Astronomers believe that our own Milky Way galaxy is
approximately 13.6 billion years old
. The newest galaxy we know of formed only about 500 million years ago.
What is the composition of the planets?
The two largest planets, Jupiter and Saturn, have nearly the same chemical makeup as the Sun; they are composed primarily of the
two elements hydrogen and helium
, with 75% of their mass being hydrogen and 25% helium. On Earth, both hydrogen and helium are gases, so Jupiter and Saturn are sometimes called gas planets.
What is solar system explain with diagram?
The Solar System is
the Sun and all the objects that orbit around it
. The Sun is orbited by planets, asteroids, comets and other things. The Solar System is about 4.6 billion years old. It formed by gravity in a large molecular cloud. … The other objects are pulled into orbit around the Sun.
What is composition of space?
Outer space is not completely empty—it is a hard vacuum containing a low density of particles, predominantly
a plasma of hydrogen and helium
, as well as electromagnetic radiation, magnetic fields, neutrinos, dust, and cosmic rays.
