They predict that in about 5 billion years from now, the Sun will turn into a "red giant". This is the scientific name given to a star at the end of its life. When our Sun becomes a red giant, its centre...
You look up into the sky. You see thousands of stars arranged in patterns or constellations. The light from these stars has traveled great distances to reach Earth. But what are stars? How far away are they? Are they all the same? Are there other planets around them? In this article, ...
How can these animals survive so far from the sunlight, under these extreme conditions? In the water, scientists found species of bacteria that split hydrogen sulfide from the water to get energy to make organic compounds (chemosynthesis). The tubeworms have bacteria in their tissues that help ...
Mercury, the closest planet to the sun, gets as near as 29 million miles (47 million km) in its elliptical orbit, while some objects in the Oort cloud, the solar system's icy shell, are thought to lie as far as 100,000 AU to 200,000 AU from the sun. PlanetDistance from sun (...
Refractors are relatively expensive, if you consider the cost per unit of aperture. Because the aperture is limited, a refractor is less useful for observing faint, deep-sky objects, like galaxies and nebulae, than other types of telescopes. Reflectors The author's Astroscan 2001 rich-field...
Refractors are relatively expensive, if you consider the cost per unit of aperture. Because the aperture is limited, a refractor is less useful for observing faint, deep-sky objects, like galaxies and nebulae, than other types of telescopes. Reflectors The author's Astroscan 2001 rich-field...
How far away from Earth are exoplanet systems? What is the distance from Jupiter to the Earth? How far is Earth from the sun in astronomical units? How far away from Earth is the nearest Earth-like exoplanet? How far has the Hubble Telescope traveled? What is the distance between Jupiter...
But light-years capture how far one object is relative to another. Earth is about eight light-minutes away from the sun, meaning humans always see it not as it is exactly at that moment but how it was eight minutes ago. The next-nearest star is Proxima Centauri, 4.25 light-years away....
This constellation is named after Andromeda, daughter of Cassiopeia, in the Greek myth, who was chained to a rock to be eaten by the sea monster Cetus. Its most notable feature is the great Andromeda Galaxy, one of the nearest galaxies to Earth and one of the few galaxies you can see ...
Because the space is so great,it is difficult to work out how far away a star is.Instead of kilometers,we have light-years.A light-year means the distance light travels in one year.Our nearest neghbour galaxy is more than 900.000 light-years aways from the earth.Question:1.Where and ...