As with last week’s Universe Puzzle, something that cannot be answered by five minutes spent googling, a puzzle that requires you to cudgel your brains a bit, and do some lateral thinking. This is a puzzle on a “Universal” topic – astronomy and astronomers; space, satellites, missions, and astronauts; planets, moons, telescopes, and so on.

This puzzle is actually from Universe Today reader, Vino; thanks Vino!

**What comes next in the sequence?**

0.789, 0.854, 0.941

UPDATE: Answer has been posted below.

**1.091**

These are the periods, in days, of the transiting extrasolar planets so far discovered, in ascending order (source): WASP-19b, CoRoT-7b, WASP-18b, and WASP-12b.

Check back next week for another Universe Puzzle!

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Is it something to do with Saturn’s Rings, where the answer is Ring E or D?

Unless I find a better answer, this is my entry: the top three largest concentration of nitrogen in a solar system object. The numbers are represented as fractions of the volume of the atmosphere. 78.9 is most likely Earth; the other two are a toss-up between Titan and Triton, I suppose.

I meant 78.9 as a percentage, of course.

Should I have said “molecular nitrogen”?

I apologise for the quasi-spam.

Yep, if it is a purely mathematical sequence, then there are MANY possibiities for a 4th element.

I’ll go with 1.05

Gosh. That’s a bit too hard.

I’ve been recently using what’s in my head – and this one just makes me look stupid – and I am not a novice when it comes to astronomy!

Next time either Wiki and some web search might be in order, or just avoid the mathematical ones….

I.e. Look for alternatives – try,

“6) Indices of Capital Input by Industry (1995 – RIETI”

“Averaged Park Factor Tables”

By a few astronomy based are;

“Research on the eclipsing system V366 Cyg.”

“Deep CCD photometry in globular cluster. IX – M10”