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Can Icelines Explain Uranus and Neptune?

A new hypothesis posits that the ice giant planets formed between the CO and N2 icelines in the Solar System’s protoplanetary disk.

Star Formation on a String

What’s causing the “beads on a string” pattern of star formation around this interacting galaxy pair?

How does structure grow? Understanding the Meszaros effect

Explore an astrophysical classic describing the effect of the Universe’s expansion on the seeds of galaxies.

Mercury’s surprising density: What about magnets?

A new model explains Mercury’s major density with magnetism.

Can gamma ray bursts be used as standard candles?

Some GRB-SNe pairs show interesting correlations across their light curves.

Growth of structure tells us how normal and dark matter scatter

What can the growth of structure in the Universe tell us about how regular matter and dark matter scatter? The authors develop a simple framework and get model-independent constraints; read on for the answer.

Bars: Star Mixologists

Can bars in a galaxy cause radial migrations of stars? The simulations say yes, but these observations suggest otherwise…

Harvesting Deep Images from the Web

Today’s authors present a way to get deep images without telescope time. Their method involves a clever compilation of sky images from the Web. The algorithm, called Enhance, synthesizes a collection of short-exposure images gleaned from the Web to produce a deep image.

Fishing for Jellyfish in Galaxy Clusters

The evolution of galaxies from one type to another is not well understood. A galaxy’s environment plays a key role in its evolution. This is especially important for galaxies in galaxy clusters, which can strip them of their gas. The authors in today’s Astrobite explore six new, dramatic examples of galaxies being stripped of their gas.

Crater Simulation

Iapetus: Growing Up in a Rough Neighborhood

Saturn’s moon Iapetus has been bombarded pretty heavily by debris from the outer Solar System. But it’s not TOO smashed up — its strange, 20-km-high, equatorial ridge is still standing. The authors of this paper simulate the bombardment of Iapetus to figure out how much mass could have collided with the moon without destroying the ridge.

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