So why has the sun been rising later than it did on Dec. 21? Like much of our day and night cycles, the answer lies in Earth's rotation and orbit. Start the day smarter. Get all the news you need ...

Its immense heat and radiation can be very dangerous, which is why it is good that we are a distance away from it that we are ...

So great an antiquity of the earth seemed to reveal itself ... loss of solar energy by radiation, the sun could acquire its present energy of rotation in thirty-two thousand years.

In 2029, one of the solar system's many asteroids will pass Earth close enough to see with the naked eye. But asteroid ...

The gigantic coronal hole is blasting high-speed solar wind toward Earth, potentially igniting vibrant auroras and minor ...

Ever since its formation around 4.5 billion years ago, Earth's rotation has been gradually slowing ... When day breaks, and the Sun rises high enough in the sky, the white microbes retreat and ...

The sun's distance from Earth changes throughout the year but ... "But also the sizes, shapes, velocities and rotation speeds of the objects themselves." On Earth, perihelion and aphelion at ...

The story of Earth’s atmospheric oxygenation is one of transformation, shaped by both biological and planetary forces. While ...