Contained in the Milky Way are stars, clouds of dust and gas called nebulae, planets, and asteroids. Stars, dust, and gas fan out from the center of the Galaxy in long spiraling arms. The Milky Way is approximately 100,000 light-years in diameter.
Moreover What nebula is Earth in? The Orion Nebula, also known as Messier 42 (or M42 for short), is the nearest star-forming region to Earth, located approximately 1,350 light-years away and is about 2 million years old according to NASA Jet Propulsion Laboratory.
How is a star born? Stars are born within the clouds of dust and scattered throughout most galaxies. … Turbulence deep within these clouds gives rise to knots with sufficient mass that the gas and dust can begin to collapse under its own gravitational attraction. As the cloud collapses, the material at the center begins to heat up.
Herein Is a galaxy bigger than a universe? Galaxies come in many sizes. The Milky Way is big, but some galaxies, like our Andromeda Galaxy neighbor, are much larger. The universe is all of the galaxies – billions of them! … Our Milky Way Galaxy is one among the billions of galaxies in our Universe.
When was the universe created?
The Big Bang was the moment 13.8 billion years ago when the universe began as a tiny, dense, fireball that exploded. Most astronomers use the Big Bang theory to explain how the universe began.
Could life exist in a nebula? Possibly, but probably not. It is not known when life formed on Earth, but Earth was once part of a nebula, and it now has life. Most likely life got started on Earth after the solar nebula was essentially gone, but that is not known with certainty.
Are we in a nebula? This depends a lot on exactly how you define a nebulae, but we are actually in a very dense region of the interstellar medium, the local interstellar cloud. Observing it directly from Earth is very difficult, due to sunlight and the solar wind, but its magnetic field has been measured by the Voyager 2 probe.
How old is the universe? Using data from the Planck space observatory, they found the universe to be approximately 13.8 billion years old.
Why is a red giant so named?
A red giant is a large non-main sequence star of stellar classification K or M; so-named because of the reddish appearance of the cooler giant stars. As Earth’s sun is of one solar mass, it is expected to become a red giant in about six billion years.
What will happen if the Sun dies? After the Sun exhausts the hydrogen in its core, it will balloon into a red giant, consuming Venus and Mercury. Earth will become a scorched, lifeless rock — stripped of its atmosphere, its oceans boiled off. … While the Sun won’t become a red giant for another 5 billion years, a lot can happen in that time.
How many suns are in the universe?
Is there only 1 sun in the universe? Explanation: There are billions of stars larger or smaller than SUn in the Galaxy..But we call them stars only.. So we have only one Sun.
What is the biggest known black hole? They can fit multiple solar systems inside of them. Ton 618, the largest ultramassive black hole, appears at the very end of the video, which, at 66 billion times the mass of the Sun, is going to weigh very heavily on how we daydream about the cosmos moving forward.
What’s the gravity of a black hole?
The black hole would have the same gravity as the sun. Earth and the other planets would orbit the black hole as they orbit the sun now. The sun will never turn into a black hole.
Who created the God?
We ask, “If all things have a creator, then who created God?” Actually, only created things have a creator, so it’s improper to lump God with his creation. God has revealed himself to us in the Bible as having always existed. Atheists counter that there is no reason to assume the universe was created.
How will universe end? Astronomers once thought the universe could collapse in a Big Crunch. Now most agree it will end with a Big Freeze. … Trillions of years in the future, long after Earth is destroyed, the universe will drift apart until galaxy and star formation ceases. Slowly, stars will fizzle out, turning night skies black.
What is bigger than the universe? No, the universe contains all solar systems, and galaxies. Our Sun is just one star among the hundreds of billions of stars in our Milky Way Galaxy, and the universe is made up of all the galaxies – billions of them.
Can life exist without a planet?
But not only is an Earth-like world not necessarily required for life to exist, recent evidence shows us that having a world at all might not be needed. It may be possible to have life in the depths of interstellar space itself. … As far as we know, life only has a few key requirements.
What if Earth was inside of a nebula?
Can planets be in nebula?
The answer would be yes. As the planet orbits its star that orbits the center of the galaxy, the planet and its star could enter a nebula and pass through that nebula for thousands or millions of years and then emerge on the other side of the nebula.
What is a dying star called? Some types of stars expire with titanic explosions, called supernovae. When a star like the Sun dies, it casts its outer layers into space, leaving its hot, dense core to cool over the eons. But some other types of stars expire with titanic explosions, called supernovae.
What is it called when a star is born?
It is called a protostar. Under what conditions do astronomers technically say a star has been born? [ 1 mark]
How old is Milky Way galaxy? Astronomers believe the Milky Way is about 13.6 billion years old — only 200 million years younger than the universe. The galaxy’s evolution began when clouds of gas and dust started collapsing, pushed together by gravity.
How old is the moon?
The most widely accepted origin explanation posits that the Moon formed about 4.51 billion years ago, not long after Earth, out of the debris from a giant impact between the planet and a hypothesized Mars-sized body called Theia.
What is the age of the universe in seconds? Most of us think the universe has no age.
Multiply 13.82 billion times 31,556,952 seconds and it should equal approximately 436,117,076,640,000,000 seconds (then round up a little).
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