the study analyzed why the tilt increased further in the 17-year time span. It's believed that when the Earth was young, "something big," about the size of the planet Mars, known as "Theia," hit ...

causing the 23.5-degree tilt. That’s why we have seasons — including the vernal equinox, this year on March 20. That rock has a name: Theia. This requires an explanation. You probably know about the ...

Saturn's rings tilt out of view every fourteen to seventeen Earth years. In 2032, they will be at their best again during ...

Spring officially begins in the Northern Hemisphere on March 20 with the vernal equinox as the entire world experiences an ...

The Vernal or Spring Equinox takes place on March 20th at 5:01 A.M. This is when the Earth’s poles neither tilt toward or ...

The effect known as 'Russell-McPherron' is down to the alignment of the Sun and Earth around the spring and autumn equinox ...

Here's how it happens—and why people have celebrated it since ... They're caused by a combination of Earth's orbit and its axial tilt. Every six months, once in March and again in September ...

As the spring equinox approaches, northern lights hunters will scour the skies for breathtaking displays of color.

The spring equinox will occur at 5:01 a.m. EDT on Thursday. Here's what to know about the start of the spring season.

Coming up this thursday night the total lunar eclipse, otherwise known as a blood moon will be visible for just about everyone across north america.Meteorologis ...