The oldest stars are planet killers As stars age, they expand. That’s bad news for planets orbiting close to their stars, according to a new study published in the Monthly Notices of the Royal Astronomical Society this month. The study...

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Image of Messier 4 (M4), a globular cluster located near Antares in the constellation Scorpius. This ancient cluster, approximately 7000 light-years away, contains hundreds of thousands of stars and is notable for its central bar of stars and its relatively small size. The image showcases the dense concentration of stars against the backdrop of the night sky, offering a glimpse into the immense scale and age of the cosmos. M4's white dwarfs are estimated to be at least nine billion years old.

Astronomy Picture from 23/05/2000

M4: The Closest Known Globular Cluster

Source: https://apod.nasa.gov/apod/ap000523.html


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