What earth do we live on?
What earth do we live on?
Earth is the planet we live on. It is the only planet in the Solar System with liquid water on its surface. It is also the only planet we know to have life on it.
What is the coolest star on earth?
According to a new study, a star discovered 75 light-years away is no warmer than a freshly brewed cup of coffee. Dubbed CFBDSIR 1458 10b, the star is what’s called a brown dwarf.
What is the coolest visible star?
A red dwarf is the smallest and coolest kind of star on the main sequence. Red dwarfs are by far the most common type of star in the Milky Way, at least in the neighborhood of the Sun, but because of their low luminosity, individual red dwarfs cannot be easily observed.
Which is the closest star to Earth?
Proxima Centauri
How many stars are on the earth?
It’s impossible to know how many stars exist, but astronomers estimate that in our Milky Way galaxy alone, there are about 300 billion.
Why the Colour of sky is blue?
The sky is blue due to a phenomenon called Raleigh scattering. This scattering refers to the scattering of electromagnetic radiation (of which light is a form) by particles of a much smaller wavelength.
Do planets twinkle?
Unlike stars, planets don’t twinkle. Stars are so distant that they appear as pinpoints of light in the night sky, even when viewed through a telescope. Because all the light is coming from a single point, its path is highly susceptible to atmospheric interference (i.e. their light is easily diffracted).
Which planet is visible to the naked eyes?
Mercury is usually not visible to the naked eye, but if the sky is clear then it will be easily visible today,” he said. “Mars will also be visible in the middle of the sky. Also, you will be able to see Jupiter, Saturn just a few degrees above the western horizon.
Why is the sky blue in Class 10?
Scattering of light is the phenomenon that causes the sky to appear blue. Fine dust in the earth’s atmosphere scatters the sunlight. Out of all the constituent colours of sunlight, blue colour is scattered the most. Thus, the sky appears blue to us.