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Hadar, aka Beta Centauri, joins Alpha Centauri in pointing to the Southern Cross. It’s a triple system. Two of its stars will someday become nearby supernovae.
The Lyrid meteor shower didn’t produced as many meteors as hoped, but we some lovely photos. And the moon and Venus were awesome Sunday morning!
It’s coming closer today than any asteroid this large since 2004. It came into view of small telescopes a few hours ago. Early radar observations indicate it’s bigger than we thought.
April 22 is the likely peak morning. Try April 21 and 23 as well. For this year’s Lyrid meteor shower, the moon is out of the way!
Here’s something you – or your kids – might notice. When you’re moving in a car, earthly objects get left behind, but the moon seems to follow. Why?
While watching Jupiter and the moon around April 9-11, don’t forget Venus! It passed between us and the sun on March 25 and now blazes in the east before dawn.
The 4 largest moons of Jupiter – called the Galilean satellites – are Io, Europa, Ganymede and Callisto. Recent photos here.
This is what the opposition of Jupiter means.
All 5 bright planets appear in the April night sky.
Is Lunar X a sign of an alien visitation? No. It’s an example of how lighting and topography can combine to produce a pattern that seems familiar to the human eye.
Comet 41P/Tuttle-Giacombini-Kresák will be closer to Earth on April 1 than it’s been since its discovery. You need a telescope to see it, but there’s an online viewing Friday night.
When you see the crescent moon after sunset this week, notice the pale glow on its unlit portion. This glow is called earthshine.
Venus reaches inferior conjunction today, officially leaving the evening sky. It has been low in the sky, where Earth’s atmosphere has caused Venus to scintillate, or twinkle, in many colors.
The planet Venus is now appearing in the west after sunset and in the east before sunrise. Don’t believe it? Astronomer Bruce McClure reports on his observation.
Brightest stars to the eye are 1st magnitude, and dimmest stars to the naked eye are 6th magnitude. How the magnitude scale works in astronomy and why it’s useful.
Here’s a fun activity for the coming months. Note how far the sun moves on your horizon each day, as spring shifts toward summer (or autumn towards winter).
The 2017 vernal or spring (or fall) equinox occurred on March 20 at 10:29 UTC. Spring for the north – fall for the south – of Earth’s globe.
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.
When a camera captures a star’s movement across the sky, it’s called a star trail. An astrophotographer explains how he does it.
All you need to know about the 1st total solar eclipse visible from the contiguous U.S. since 1979, from eclipse master Fred Espenak.
Io’s shadow on Jupiter