NASA researchers have determined that porous boulders on asteroid Bennu cause it to lose heat quickly.

"NASA solves why asteroid Bennu loses heat so quickly" — Science Daily (all) · Science & Medicine

20 Oct 2026

What it means

This refers to a NASA study explaining why the asteroid 's surface temperature drops rapidly after sunset. The likely explanation is that the rocks on Bennu are highly porous, which causes them to store little heat during the day and radiate it away quickly at night. This finding comes from thermal data collected by the OSIRIS-REx spacecraft.

Accuracy & sourcesSourced

The claim is based on a peer-reviewed study or NASA press release, making it authoritative regarding the research findings. The reporting by Science Daily is a secondary summary, but the provenance tier indicates it is directly sourced from the official paper or release.

How new

This appears to be genuinely new coverage of a recent study, not resurfaced material.

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