Phil Plait

Bad Astronomy

Exoplanet in a triple star system smack dab in the habitable zone

The Seven Sisters (Image Credit: Mihai_Andritoiu/Shutterstock)

The pleiades open star cluster

On July 20, 2025, the Seven Sisters celestial event will be visible across the United States and Canada. 

The Seven Sisters Eclipse Will Temporarily Block Stars From View

A moderately eroded fluvial sinuous ridge (FSR), with lots of small craters in it, that stands out clearly above the surrounding material. To the north east it emerges from a small valley and becomes progressively clearer to the west, until it disappears. There is a clear curve in the FSR, likely a meander. North of the FSR is a round, flat feature that was likely an impact crater which was filled with water or sediment. CTX image: MurrayLab_V01_E020_N-20_Mosaic (Image Credit: NASA/JPL/MSSS/The Murray Lab)

Fluvial sinous ridge on Mars

Researchers examining Noachis Terra in Mars’ southern highlands found evidence of extensive river networks – some hundreds of kilometers long.

Ancient Riverbeds on Mars Suggest the Planet Was Wetter and More Complex Than Previously Thought

Four jadeite tubular beads showing live and dead spider monkeys.
(Image Courtesty of Caracol Archeological Project/University of Houston)


jadeite figures

Learn more about Te K’ab Chaak, the first Maya king from Caracol whose tomb is rewriting the history of Maya-Mesoamerica relations.

1,600-Year-Old Tomb of Maya King Wearing a Jade Death Mask Discovered in Belize

Woolly rhinoceros or Elasmotheriinae, one of the ancient rhino species mentioned in this study.
(Image Credit: aleks1949/Shutterstock) 

Elasmotheriinae

Learn more about a rhino tooth that is changing the field of paleontology and providing crucial insights into rhinoceros evolution and conservation.

Protein Found in 20-Million-Year-Old Rhino Tooth is Oldest Ever Sequenced

(Image Credit: Vadim Sadovski/Shutterstock) 

asteroid

Learn about two major asteroid impacts from 3.5 million years ago that may not have had lasting environmental effects. 

Strikes From Two Eocene Asteroids May Not Have Changed Earth’s Climate Long Term 

Natural outcrop of red jasper in the Mgwayiza Valley, Eswatini. (Image Courtesy of Mbongeni Dlamini)

Exoplanet in a triple star system smack dab in the habitable zone

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