4. XMM-Newton helps revise distance to outer spiral arms (www.esa.int)

The European Space Agency’s XMM-Newton and NASA’s Chandra X-ray space telescopes have spotted the aftermath of three bright explosions echoing through the outer spiral arms of our galaxy, the Milky Way. By measuring the distance to these echoes, they find the outer arms to be up to 10% further away than we thought.

13. Show HN: Durable AI agents without the workflow engine (www.noworkflows.dev)

Teams wire a durable-execution engine to a sandbox fleet to keep agents alive: journaled steps, stateful session objects, cancellation signals, TTL glue. An agent session is that whole stack behind one API β€” the event log is the journal, the sandbox is attached, and resume is a cursor.

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