- How old is our universe?
- Can humans travel light speed?
- Can we travel faster than light?
- What color is the hottest star?
- How old is our galaxy?
- How many stars are there?
- What size star is our sun?
- Is it possible to travel to a star?
- How far away is Voyager 1 in light-years?
- How far is the nearest black hole?
- Is it possible to travel back in time?
- What is the oldest star?
- What is the oldest thing in the universe?
- Will we ever reach the nearest star?
- What is the biggest star in the universe?
- What are the 10 closest stars to Earth?
- How fast can we travel in space?
- How long would it take to reach the nearest star?
- How far is the next star?
- What are the 13 planets in our solar system?
- Where is the next closest star?
How old is our universe?
13.77 billion yearsThe universe is (nearly) 14 billion years old, astronomers confirm.
With looming discrepancies about the true age of the universe, scientists have taken a fresh look at the observable (expanding) universe and have estimated that it is 13.77 billion years old (plus or minus 40 million years)..
Can humans travel light speed?
So will it ever be possible for us to travel at light speed? Based on our current understanding of physics and the limits of the natural world, the answer, sadly, is no. … So, light-speed travel and faster-than-light travel are physical impossibilities, especially for anything with mass, such as spacecraft and humans.
Can we travel faster than light?
In special relativity, it is impossible to accelerate an object to the speed of light, or for a massive object to move at the speed of light. However, it might be possible for an object to exist which always moves faster than light.
What color is the hottest star?
Blue starsWhite stars are hotter than red and yellow. Blue stars are the hottest stars of all.
How old is our galaxy?
13.51 billion yearsMilky Way/Age
How many stars are there?
There are an estimated one hundred billion (100,000,000,000) stars in our own Milky Way galaxy, although some estimates range up to four times that many, much depending on the number of brown dwarfs and other very dim stars. A typical galaxy may contain anywhere between about ten million and one trillion stars.
What size star is our sun?
The Short Answer: Our Sun is an average sized star: there are smaller stars and larger stars, even up to 100 times larger. Many other solar systems have multiple suns, while ours just has one. Our Sun is 864,000 miles in diameter and 10,000 degrees Fahrenheit on the surface.
Is it possible to travel to a star?
The technology required to travel between galaxies is far beyond humanity’s present capabilities, and currently only the subject of speculation, hypothesis, and science fiction. However, theoretically speaking, there is nothing to conclusively indicate that intergalactic travel is impossible.
How far away is Voyager 1 in light-years?
In about 40,000 years, Voyager 1 will drift within 1.6 light-years (9.3 trillion miles) of AC+79 3888, a star in the constellation of Camelopardalis which is heading toward the constellation Ophiuchus.
How far is the nearest black hole?
1,500 light-yearsNow, astronomers have discovered a black hole with just three times the mass of the sun, making it one of the smallest found to date—and it happens to be the closest known black hole, at just 1,500 light-years from Earth.
Is it possible to travel back in time?
While the debate continues over whether travelling into the past is possible, physicists have determined that travelling to the future most certainly is. And you don’t need a wormhole or a DeLorean to do it. Real-life time travel occurs through time dilation, a property of Einstein’s special relativity.
What is the oldest star?
Methuselah starHD 140283 (or the Methuselah star) is a metal-poor subgiant star about 200 light years away from the Earth in the constellation Libra, near the boundary with Ophiuchus in the Milky Way Galaxy. Its apparent magnitude is 7.205. It is the oldest star known as of 2021.
What is the oldest thing in the universe?
Universe’s oldest known quasar discovered 13 billion light-years away. Astronomers have found the farthest known source of radio emissions in the universe: a galaxy-swallowing supermassive black hole.
Will we ever reach the nearest star?
The nearest star is four light years away. That means that light, traveling at 300,000 kilometers per second would still need FOUR YEARS to reach the nearest star. The fastest spacecraft ever launched by humans would need tens of thousands of years to make that trip.
What is the biggest star in the universe?
The largest known star in the universe is UY Scuti, a hypergiant with a radius around 1,700 times larger than the sun.
What are the 10 closest stars to Earth?
The 10 Closest Stars to EarthThe Sun, the Closest Star to Earth. Günay Mutlu/Photorgapher’s Choice RF/Getty Images. … Alpha Centauri. Courtesy Skatebiker/Wikimedia Commons/CC BY 3.0. … Barnard’s Star. Alan Dyer/Stocktrek Images/Getty Images. … Wolf 359. Free-Photos/Pixabay. … Lalande 21185. NASA, ESA and G. … Sirius. … Luyten 726-8. … Ross 154.More items…•Jan 10, 2020
How fast can we travel in space?
300,000 kilometers per secondBut Einstein showed that the universe does, in fact, have a speed limit: the speed of light in a vacuum (that is, empty space). Nothing can travel faster than 300,000 kilometers per second (186,000 miles per second).
How long would it take to reach the nearest star?
In short, at a maximum velocity of 56,000 km/h, Deep Space 1 would take over 81,000 years to traverse the 4.24 light-years between Earth and Proxima Centauri. To put that time-scale into perspective, that would be over 2,700 human generations.
How far is the next star?
Alpha Centauri A & B are roughly 4.35 light years away from us. Proxima Centauri is slightly closer at 4.25 light years.
What are the 13 planets in our solar system?
Planets in Our Solar SystemMercury. 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.
Where is the next closest star?
Proxima Centauri has two confirmed exoplanets: Proxima Centauri b and Proxima Centauri c. Proxima Centauri b orbits the star at a distance of roughly 0.05 AU (7.5 million km) with an orbital period of approximately 11.2 Earth days….Proxima Centauri.Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)Age4.85 GyrOther designations58 more rows