- Are black holes?
- Will humans ever travel to other galaxies?
- Where is Earth in the universe?
- Can stars form outside of galaxies?
- Is every star in the sky a galaxy?
- What is the biggest star in the universe?
- Can a solar system exist outside a galaxy?
- What is space like outside of a galaxy?
- What are the 15 planets?
- Is there 8 or 9 planets?
- Where is our galaxy in the universe?
- What are the 7 types of stars?
- What is outside of the universe?
- How long does a star live for?
- Is Pluto a planet in 2020?
- Can you see Milky Way with eyes?
- How many planets are there 2020?
- Do all galaxies have black holes?
Are black holes?
A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it.
The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole..
Will humans ever travel to other galaxies?
Intergalactic travel for humans is therefore possible, in theory, from the point of view of the traveler. … Traveling to the Andromeda Galaxy, 2.54 million light years away, would take 28 years on-ship time with a constant acceleration of 1g and a deceleration of 1g after reaching half way, to be able to stop.
Where is Earth in the universe?
Virgo Supercluster of galaxiesWell, Earth is located in the universe in the Virgo Supercluster of galaxies. A supercluster is a group of galaxies held together by gravity. Within this supercluster we are in a smaller group of galaxies called the Local Group. Earth is in the second largest galaxy of the Local Group – a galaxy called the Milky Way.
Can stars form outside of galaxies?
Yes, stars can form outside galaxies if the conditions are right. … In principle star formation can happen anywhere where there is dense, cold gas that can collapse gravitationally. Stars can sometimes help by forcing gas together by radiation pressure. There are intergalactic gas clouds, but they are usually too hot.
Is every star in the sky a galaxy?
Our Sun (a star) and all the planets around it are part of a galaxy known as the Milky Way Galaxy. … All the stars we see in the night sky are in our own Milky Way Galaxy. Our galaxy is called the Milky Way because it appears as a milky band of light in the sky when you see it in a really dark area.
What is the biggest star in the universe?
Answer: The largest known star (in terms of mass and brightness) is called the Pistol Star. It is believed to be 100 times as massive as our Sun, and 10,000,000 times as bright! In 1990, a star named the Pistol Star was known to lie at the center of the Pistol Nebula in the Milky Way Galaxy.
Can a solar system exist outside a galaxy?
An extragalactic planet, also known as an extragalactic exoplanet, is a star-bound planet or rogue planet located outside of the Milky Way Galaxy. … This means that even galactic planets located farther than that distance have not been detected.
What is space like outside of a galaxy?
Intergalactic space is as close as you can get to an absolute vacuum. There’s very little dust and debris, and scientists have calculated that there’s probably only one hydrogen atom per cubic meter. The density of material is higher near galaxies, and lower in the midpoint between galaxies.
What are the 15 planets?
Is there 8 or 9 planets?
There are eight planets in the solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. … Our solar system is an orderly arrangement of planets orbiting the Sun. NASA. Pluto, a dwarf planet, was classified as one of the solar system planets when it was first discovered by Clyde Tombaugh.
Where is our galaxy in the universe?
It is located in the first galactic quadrant at a distance of 3 kpc (about 10,000 ly) from the Galactic Center. A simulation published in 2011 suggested that the Milky Way may have obtained its spiral arm structure as a result of repeated collisions with the Sagittarius Dwarf Elliptical Galaxy.
What are the 7 types of stars?
Stars are classified by their spectra (the elements that they absorb) and their temperature. There are seven main types of stars. In order of decreasing temperature, O, B, A, F, G, K, and M. O and B stars are uncommon but very bright; M stars are common but dim..
What is outside of the universe?
Astronomers think space outside of the observable universe might be an infinite expanse of what we see in the cosmos around us, distributed pretty much the same as it is in the observable universe. … After all, it doesn’t make sense that one section of the universe would be different than what we see around us.
How long does a star live for?
about 10 billion yearsA star like our sun lives for about 10 billion years, while a star which weighs 20 times as much lives only 10 million years, about a thousandth as long. Stars begin their lives as dense clouds of gas and dust.
Is Pluto a planet in 2020?
According to the International Astronomical Union, the organization charged with naming all celestial bodies and deciding on their statuses, Pluto is still not an official planet in our solar system.
Can you see Milky Way with eyes?
Every star you can see with the unaided eye is located within the milky way. The only object you can see (without optical aid) in the sky outside of the milky way is the Andromeda Galaxy. … Located in the constellation Sagittarius, this is the brightest part of the milky way.
How many planets are there 2020?
8The simple official answer to this question is 8. The solar system planets in order from the Sun are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. This has been correct since 2006 when the International Astronomy Union actually defined what a “Planet” is and also what a “Dwarf Planet” is.
Do all galaxies have black holes?
Almost every galaxy, including our Milky Way, has a supermassive black hole at its heart, with masses of millions to billions of times the mass of the sun. Astronomers are still studying why the heart of galaxies often hosts a supermassive black hole.