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Eddie Irizarry

Earth has a new quasi-satellite

Asteroid 2016 HO3 is Earth’s nearby companion in space. It’s not a second moon, but it has an orbit so similar to ours that it’ll remain nearby for hundreds of years.

I saw a flash in the night sky. What is it?

We can’t always say for sure what you saw in the night sky. But it might have been a flare from an iridium satellite.

Comet visible in binoculars, nearly closest

Comet C/2013 X1 (PanSTARRS) isn’t visible to the eye, but binoculars can pick it up. Charts and other info that can help you spot the comet in the coming weeks!

Closest comet in 246 years via radar

Record-breakingly close flybys of two comets earlier this week. Radar images of one, the closest comet in 246 years. Will the other be visible to the eye?

Small asteroid detected 4 days after passing as close as satellites

On March 15, astronomers detected an asteroid that had passed closest to Earth on March 11, sweeping in at about the distance of our geostationary satellites.

Asteroid 2013 TX68 passed safely Monday

The asteroid – whose precise trajectory was unknown – passed Earth on March 7 at 13:42 UTC (8:42 ET) at some 10 times the moon’s distance.

Space rocks from Florida fireball found!

A rare find by meteorite hunters in Florida, from the daylight meteor that streaked across skies in the U.S. southeast in late January.

How to see Comet Catalina

Hints on how to perceive the comet’s gradual motion across the sky as it sweeps closest – but not too close – around January 17.

Seeing black holes in visible light

For the first time, flickering light was seen around a nearby black hole in outburst. It was bright enough to be seen in small telescopes.

Curiosity’s 10 best images of Mars in 2015

As of December, 2015, Curiosity has acquired over 292,000 images from Mars’ surface. Here are our picks for the top 10 images by the rover in 2015.