Posts by 

Deborah Byrd

Sunrises this weekend

Enjoy these January sunrises, from EarthSky friends.

NASA and NOAA: 2017 was record-setting for warmth

NASA says 2nd-warmest year on record. NOAA says 3rd-warmest. Their methodologies differ slightly, but - by both standards - the 2017 results make the past 4 years the hottest yet recorded.

Saturn moon Titan has a sea level

A new topographic map of Titan, plus a new study showing that Titan's seas lie at an average elevation - a sea level - just as Earth's do.

How massive can neutron stars be?

Settling a long debate, astrophysicists at Goethe University Frankfurt now say neutron stars can't exceed the mass of 2.16 suns.

Supercomputer insights on mysterious black hole jets

Scientists used the Blue Waters supercomputer to show that a black hole's relativistic jets and accretion disk both may be spinning - and precessing over time - around an axis separate from the black hole itself.

Zooming star points to black hole in globular star cluster

Globular star clusters contain our galaxy's most ancient stars. Astronomers didn't expect to find a 4-solar-mass black hole in one, but ... voila!

Best photos: Morning planets!

On Sunday morning, Jupiter and Mars were half a moon-diameter apart. Now the moon is sweeping past. Plus Mercury and Saturn are in conjunction this weekend. Photos here.

Our Milky Way as a “melting pot”

Where do stars we see at night come from? Newly confirmed streams of stars - thought to be coming to our Milky Way from other galaxies - suggest not all Milky Way stars were born here.

Astronomers detect whirlpool movement in earliest galaxies

Astronomers looked back to a time only 800 million years after the Big Bang and found whirlpool shapes in small, very young galaxies.

A 3D journey through the Orion Nebula

Astronomers and visualization specialists at NASA have just released this unprecedented, 3-dimensional, fly-through view of the Orion Nebula, a nearby star-forming region.

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