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 was the form of the material from which the solar system formed?
Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust . The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula – a spinning, swirling disk of material.
What was the form of the material from which the solar system formed quizlet?
What was the form of the material from which the Solar System formed? a nebula made mostly of hydrogen and helium gas , but enriched in heavier elements from previous supernova explosions.
What was the first thing made in the solar system?
The first artificial object sent into space was the Soviet satellite Sputnik 1 , launched in 1957, which successfully orbited Earth until 4 January the following year. The American probe Explorer 6, launched in 1959, was the first satellite to image Earth from space.
How 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. The Sun formed in the center, and the planets formed in a thin disk orbiting around it.
What is the name of our solar system?
Our planetary system is named the “ solar system ” because our Sun is named Sol, after the Latin word for Sun, “solis,” and anything related to the Sun we call “solar.” Our planetary system is located in an outer spiral arm of the Milky Way galaxy.
What are the four major features of our solar system?
- smaller size and mass.
- higher density (rocks and metal)
- solid surface.
- few moons and rings.
- closer to the Sun.
Why is it called the solar nebula theory?
Solar nebula, gaseous cloud from which, in the so-called nebular hypothesis of the origin of the solar system, the Sun and planets formed by condensation . Swedish philosopher Emanuel Swedenborg in 1734 proposed that the planets formed out of a nebular crust that had surrounded the Sun and then broken apart.
What are four key features of our solar system?
Four major features provide clues: (1) The Sun, planets, and large moons generally rotate and orbit in a very organized way. (2) With the exception of Pluto, the planets divide clearly into two groups: terrestrial and jovian. (3) The solar system contains huge numbers of asteroids and comets.
Who named Planet Earth?
All of the planets, except for Earth, were named after Greek and Roman gods and godesses . The name Earth is an English/German name which simply means the ground. It comes from the Old English words ‘eor(th)e’ and ‘ertha’.
Who first discovered the planets?
| PLANET DIST. FROM SUN (A.U.) ORBIT PERIOD (EARTH-YEARS) | Neptune 30.11 164.79 | Pluto 39.44 248.5 |
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How old is our Earth?
Earth is estimated to be 4.54 billion years old , plus or minus about 50 million years. Scientists have scoured the Earth searching for the oldest rocks to radiometrically date.
How old is our galaxy?
Most galaxies are between 10 billion and 13.6 billion years old . Our universe is about 13.8 billion years old, so most galaxies formed when the universe was quite young! Astronomers believe that our own Milky Way galaxy is approximately 13.6 billion years old.
What is the hottest planet?
Venus is the exception, as its proximity to the Sun and dense atmosphere make it our solar system’s hottest planet. The average temperatures of planets in our solar system are: Mercury – 800°F (430°C) during the day, -290°F (-180°C) at night. Venus – 880°F (471°C)
How many galaxies are there?
The deeper we look into the cosmos, the more galaxies we see. One 2016 study estimated that the observable universe contains two trillion—or two million million —galaxies. Some of those distant systems are similar to our own Milky Way galaxy, while others are quite different.
Where is Earth in our galaxy?
The Milky Way is a large spiral galaxy. Earth is located in one of the spiral arms of the Milky Way (called the Orion Arm) which lies about two-thirds of the way out from the center of the Galaxy.
