The BAAO Junior Astro Challenge 2026 runs from 30 October to 20 November — two short online papers, a modest school-level fee, and a certificate for every entrant. Here's exactly what to expect, and where to start if you want your KS3 child ready for it.

Our full guide to the Junior Astro Challenge covers why it's worth doing and where it leads. This is the short, practical version: the dates, the format, and what it actually costs.

The dates

The 2026 Junior Astro Challenge opens at 07:00 on 30 October 2026 and closes at 18:00 on 20 November 2026. That's a roughly three-week window rather than a single fixed exam date, which gives schools flexibility to slot the two papers into the timetable wherever they fit best — but it's still worth checking with the school's science department early, since the window has a hard close and a school that hasn't registered by then simply misses the year.

The format

The challenge is delivered as two online sections, each around 25 minutes long, with roughly 30 multiple-choice questions per section — about 60 questions across the whole challenge, sat online rather than on paper. It's run as part of the British Physics Olympiad, based at the University of Oxford, under the British Astronomy and Astrophysics Olympiad (BAAO) banner — the same organisation behind the senior BAAO rounds and, ultimately, the UK's entry to the International Olympiad on Astronomy and Astrophysics. Being online and multiple-choice, it's a genuinely accessible format: no long-form written answers, no specialist equipment beyond a computer, and a manageable amount of sitting time on the day rather than a full exam-length ordeal.

Who it's for

The challenge is aimed at Year 10, but entrants across Years 7 to 11 are explicitly encouraged — which is exactly what makes it worth a KS3 family's attention. A keen Year 8 or Year 9 child with a genuine interest in space can take part on the strength of that interest, not on their year group, which is unusual among UK academic competitions and is one of the main reasons it's worth flagging to a school early rather than waiting until Year 10 feels "due".

The cost

Entry runs through school, at a flat £20 registration fee per school, covering entry for up to 999 students at that school. There's no per-child charge on top of that, and no separate individual sign-up route — the practical first step is simply making sure the school's science department knows the challenge exists and has registered before the window opens. For a school with even a handful of interested pupils, the fee works out to next to nothing per child, which is part of why it's worth a polite nudge to the department rather than assuming someone else has already asked.

The awards

Entrants earn one of four outcomes depending on performance: a Gold, Silver, Bronze, or Participation certificate. That spread matters for a first-time KS3 entrant in particular — there's a genuine, meaningful certificate available across a real range of scores, not just for the handful of top performers, which keeps the challenge feeling worth entering even for a child trying it for the first time. A Participation certificate is still evidence of having taken on a university-run challenge outside the school timetable, on a subject the child chose for themselves.

Getting ready in the weeks before

With a three-week window and a roughly minute-per-question pace across two papers, the most useful preparation isn't cramming new material — it's making sure the core astronomy facts a KS3 child already half-knows come back quickly and confidently under time pressure. That's a different job from reading a summary once and hoping it sticks; it means the child has actually been asked the question and had to produce the answer themselves, more than once, spaced out over a few weeks rather than crammed into a single evening.

Our piece on preparing with spaced repetition walks through exactly how to build that kind of fast recall using short, spaced review sessions rather than one long revision push. If you want the underlying content first, the core facts the challenge draws on and the misconceptions most worth correcting are the two places to start — and if you're wondering whether any of this needs a specialist astronomy background to tackle, it doesn't: it sits inside ordinary KS3 science.

The one-line version

Register through school before 20 November 2026, expect two 25-minute online multiple-choice papers, budget £20 for the whole school regardless of how many pupils sit it, and know that every entrant — not just the strongest scorers — walks away with a certificate for having tried.

FAQ

When does the BAAO Junior Astro Challenge 2026 run?

The 2026 window is 30 October to 20 November 2026, opening at 07:00 on the first day and closing at 18:00 on the last.

What does it cost to enter?

A £20 registration fee per school, which covers entry for up to 999 students at that school — an individual pupil doesn't pay separately.

What format are the papers, and what can my child win?

Two online sections, 25 minutes each, roughly 30 multiple-choice questions per section. Entrants earn a Gold, Silver, Bronze or Participation certificate depending on how they do.

Duke Harewood built aitutors.me's tutors (Mentor and Professor Pi) for his own Year 8 daughter. He writes about UK education, competitions, and helping curious children go deeper without burning out.