This year’s spring or vernal equinox will happen on Wednesday, March 20. Earth’s rotation does not cause the spring equinox. Rather,equinoxes occur because the planet has a tilted axis. Spring comes when the sun’s warming rays line up perpendicular to Earth’s axial tilt. During an equinox at Earth‘s equator, the […]
A global dust storm has engulfed Mars, and NASA says it’s “one of the most intense ever observed.” The dust storm‘s total area is big enough to cover North American and Russia. From the perspective of NASA’s long-lived Opportunity rover on Mars, the sky is nearly black in the middle […]
The vernal equinox of 2018 passed at 3.15am, AEDT. Earth’s rotation does not cause equinoxes. Equinoxes occur when Earth’s tilted axis is perpendicular to the sun’s rays. During an equinox at Earth’s equator, the sun appears almost directly overhead. The year’s vernal equinox, also called the March or – in […]
Following is a transcript of the video.
NASA is celebrating the 50th anniversary of the Apollo 11 mission this month. Astronauts on each of NASA’s six Apollo missions planted an American flag on the moon. Brilliant sunlight and a lack of atmosphere to filter it have likely bleached all of the Apollo flags bone-white. It’s possible some […]
On a clear sunny day the sky is blue, but why...