How do we know the age of the universe?
universe We know that the universe is around 13.8 billion years old, but how? Stars, galaxies, stellar remnants, and other things with ages spanning billions of years are disperse throughout…
Chinese spacecraft will collide with Earth.
spacecraft A Long March 5B rocket has returned to Earth during an uncontrolled reentry four times in the last two years.This week, after delivering its third and last module to…
A planet-killing asteroids hidden in the sun
Asteroids Now a “planetary killer” asteroid that hiding in the sun’s glare one day strike Earth. Astronomers have recently identify a number of big space rocks close to the orbit…