“Debris? You mean rock?”

Yes. Also fusion products. And the intrinsic illumination — Monica, something is happening on the surface, or maybe in deeper layers. Something very energetic.

Alfred had first gotten the call from his night assistant, a graduate student. It was the student’s job to control the big telescope Alfred was working on at Kitts Peak. Alfred, sitting in an office, confirmed whatever target star he wanted, and observations were made with spectroscopes and charged-couple detectors.

Nobody had been watching the planets, at Kitts Peak Observatory. It was just a casual glance out the window by the night assistant that had led to her noticing the change to Venus.

That was the way with modern astronomy, Monica thought wryly. Nobody looked through the big telescopes any more.

We were finishing up for the night. We were actually getting ready to park the telescope and —

“Tell me what you did.”

The first thing was to get on the IAU nets. The International Astronomy Union, the astronomers” jungle telegraph. There are ground-based observers working on this all over the planet already, Monica. Also the radio telescopes. I contacted NASA; they’re repositioning some of the satellites, for example the ultraviolet and X-ray and gamma ray observatories. We’re also speaking to the Europeans, Canadians and Japanese. The Space Station astronauts are doing some good work. NASA are sending up high-altitude experiments, by balloon and sounding rocket and aircraft. NASA are responding quickly, in fact.

“Well, NASA would,” she said drily. “They’re probably putting together a budget proposal for a new Venus probe as we speak.”

If they are you ought to back it, Alfred said. Monica, we don’t have the faintest understanding of what we’re seeing here. Right now Venus is on the far side of the sun. It took around fourteen minutes for the light curve to show up here. Photons, travelling at light speed. A minute later, a cosmic ray shower showed up.