Teachers can engage students in creative, informative activities to learn more about the spring equinox and how it is ...

A massive burst of gamma rays produced by the explosion of a star almost two billion light-years away was so powerful that it changed Earth’s atmosphere, according to scientists. Gamma rays are ...

The Earth is tilted on its axis at an average of 23.5 degrees but, at the equinox, the tilt is perpendicular to that of the sun's rays, resulting in the 12 hours of day and 12 hours of night.

Here's why there's a down-to-the-minute time that marks spring's beginning: Twice a year, in late March and late September, the sun's rays ... of Earth and the sun during an equinox.

This occurs when the earth tilts on its axis and begins to be tilted more to the sun allowing for the stronger rays of the sun to move north of the equator. The spring equinox eventually gives us ...

it takes 89 days after the December solstice for Earth to reach the March equinox. That's when the most direct rays of the sun have slipped back up to the equator. Related stories Another 92 days ...

The shortest day of the year heralds the arrival of winter; after this, days finally start getting longer in the northern hemisphere, which houses about 90% of ... time of an equinox, your shadow ...

As September turns summer into fall, our old friend Saturn sinks into the sun’s afterglow. Left behind – for now – in the evening sky, Mars manages to avoid the same fate. But ...