Why isn’t Easter this Sunday?

Easter generally falls on the 1st Sunday following the 1st full moon following the vernal equinox. Last night’s full moon came about 4 hours after the astronomical equinox. So why isn’t this Sunday Easter?

Watch spacewalk March 22

NASA TV will air 3 upcoming spacewalks by ISS astronauts, the first of which happens tomorrow, March 22. Coverage begins at 10:30 UTC (6:30 a.m. EDT). The spacewalk is scheduled to start at 12:05 UTC (8:05 a.m. EDT) and last 6.5 hours.

Do you have a magnetic compass in your head?

New evidence suggests that humans have a magnetic sense that lets our brains detect and respond to Earth’s magnetic field.

Watch the sun’s shift on your horizon

Looking for an easy, but profound, sky activity? Note how far the sunset moves on your horizon, as spring shifts toward summer, or autumn toward winter, on your part of the globe.

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A Chinese perspective on spring

In Chinese thought, spring is associated with the direction east, the sunrise direction as Earth spins us toward the beginning of each new day.

A jet stream in Europa’s ocean?

Jupiter’s moon Europa likely has a subsurface ocean, possibly salty, with volcanic vents on its ocean floor. A new study suggests it might also have an oceanic jet stream, comparable to the Gulf Stream back here on Earth.

Astronomers discover 83 more supermassive black holes

Astronomers used a cutting-edge camera mounted on one of the world’s largest telescopes to discover 83 new quasars – powered by central, supermassive black holes – in the very early universe.

Fastest sunsets happen near equinoxes

We’re talking about the amount of time needed for the body of the sun to sink below the horizon. It’s true. The sun actually sets faster around the time of an equinox.

Storm in a cosmic teacup

Nicknamed the Teacup because of its shape, this quasar is causing a cosmic storm in a distant galaxy. The source of the squall is a supermassive black hole buried at a galaxy’s center.

Mining the moon

How can the cost of space travel – to and from the moon and possibly to Mars – be reduced? One approach is to mine the moon for necessary resources.

Are day and night equal at the equinox?

Equinox means “equal night.” And you might hear that day and night are equal at the equinoxes. Yet Earth’s air and our sun conspire to give us more day than night at an equinox.

Goldilocks stars: Just right for habitable planets

Which stars are the most likely to have habitable planets? A new study suggest that K stars – between the dimmest M-type red dwarfs and sunlike stars – might provide the sweet spot for life.

March equinox: All you need to know

The March 20, 2019, equinox is an event that happens on our sky’s dome and a seasonal marker in Earth’s orbit around the sun.