- What does space smell like?
- How old is the universe?
- What is the true color of the sun?
- What is Corona of Sun?
- What if the sun was black?
- Why do you not see stars in space?
- Can there be a black sun?
- Why is it dark in space?
- How long until the world dies?
- Why Sun is not visible at night?
- Are black holes?
- Is our sun actually green?
- What color is the hottest star?
- Is the sun purple?
- How hot is the hottest star in the universe?
What does space smell like?
sweet-smelling welding fumes’, ‘burning metal’, ‘a distinct odour of ozone, an acrid smell’, ‘walnuts and brake pads’, ‘gunpowder’ and even ‘burnt almond cookie’.
Some astronauts have likened the smells of space to walnuts.
Image source: LubosHouska; CC0..
How old is the universe?
13.8 billion yearsOur universe is 13.8 billion years old, a timescale much longer than the more relatable spans of hundreds or thousands of years that impact our lived experiences.
What is the true color of the sun?
whiteThe color of the sun is white. The sun emits all colors of the rainbow more or less evenly and in physics, we call this combination “white”. That is why we can see so many different colors in the natural world under the illumination of sunlight.
What is Corona of Sun?
The Sun’s corona is the outermost part of the Sun’s atmosphere. The corona is usually hidden by the bright light of the Sun’s surface. … However, the corona can be viewed during a total solar eclipse. Our Sun is surrounded by a jacket of gases called an atmosphere.
What if the sun was black?
If the Sun were somehow compressed enough to become a black hole, it would be less than 6 kilometers (well under 4 miles) across. It would exert no more gravitational force on Earth or the other planets in the solar system than it does now.
Why do you not see stars in space?
In space, or on the moon, there’s no atmosphere to spread the light around, and the sky will appear black at midday – but that doesn’t mean it’s not just as bright. … Fast exposure times means they can get good pictures of the bright Earth or lunar surface, but it also means no stars in the picture.
Can there be a black sun?
A dim object less than 10 light years from Earth appears to be the closest brown dwarf yet found. The “star” is so cold that any residents on an orbiting planet would see a dark sun in their starry “daytime” sky. The discovery suggests that brown dwarfs are common and that the objects could exist even closer to Earth.
Why is it dark in space?
The daytime sky is blue because light from the nearby Sun hits molecules in the Earth’s atmosphere and scatters off in all directions. … At night, when that part of Earth is facing away from the Sun, space looks black because there is no nearby bright source of light, like the Sun, to be scattered.
How long until the world dies?
Four billion years from now, the increase in the Earth’s surface temperature will cause a runaway greenhouse effect, heating the surface enough to melt it. By that point, all life on the Earth will be extinct.
Why Sun is not visible at night?
The Sun is our nearest star. … From Earth, the Sun looks like it moves across the sky in the daytime and appears to disappear at night. This is because the Earth is spinning towards the east. The Earth spins about its axis, an imaginary line that runs through the middle of the Earth between the North and South poles.
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.
Is our sun actually green?
Our sun is a green star. In the sun’s case, the surface temperature is about 5,800 K, or 500 nanometers, a green-blue. However, as indicated above, when the human eye factors in the other colors around it, the sun’s apparent color comes out a white or even a yellowish white.
What color is the hottest star?
Blue starsWhite stars are hotter than red and yellow. Blue stars are the hottest stars of all.
Is the sun purple?
It is a common misconception that the Sun is yellow, or orange or even red. However, the Sun is essentially all colors mixed together, which appear to our eyes as white. This is easy to see in pictures taken from space. Rainbows are light from the Sun, separated into its colors.
How hot is the hottest star in the universe?
The hottest stars may be almost 100,000 (100 thousand) degrees Fahrenheit. That big number means the stars are far, far hotter than anything you have ever seen or felt here on Earth. Our Sun is about 10,000 (10 thousand) degrees F — much cooler than the hottest stars, but still super hot!