Radio Star A repeating radio signal from deep space has scientists puzzled, because they can’t fully explain what’s emitting it. Their working hypothesis, as detailed in a study published in the journal Nature Astronomy, is that the source is likely a kind of neutron star called a pulsar that fires off radio signals as it […]
Dark Spot NASA’s Mars Reconnaissance Orbiter (MRO) has discovered another intriguing formation on the planet’s barren surface. As spotted by Universe Today, the spacecraft captured this image of a satisfyingly circular pit — and what its dark, yawning entrance leads to remains a question high on the minds of Mars scientists. The image, “acquired to […]