Attention! Concerts are scheduled for Wednesday, July 1, and Thursday, July 2, at the King Baudouin Stadium.
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Attention! Concerts are scheduled for Wednesday, July 1, and Thursday, July 2, at the King Baudouin Stadium.

Avenue de Boechoutlaan is one-way (from the Atomium to the Houba-de Strooper avenue) from July 1st till 2nd. Please take this into account to present you in time for the planetarium films.

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Solar Observing Day: View Our Star Safely

5 July 2026

On Sunday, July 5, the Planetarium will take part in Solar Observing Day.

We will observe the Sun using special solar telescopes. This will be done completely safely, with filters specially designed for solar observation. Never look at the Sun without suitable protection, or through ordinary binoculars or a regular telescope.
We will show the Sun in two different ways: in white light and in H-alpha. Each method reveals a different part of the Sun.
The white-light telescope mainly shows the “lower” visible layer of the Sun, with sunspots and active regions.
The H-alpha telescope shows the solar atmosphere above it, with prominences, filaments, and sometimes explosive activity.
Together, these observations provide a beautiful view of the Sun as an active, changing star. What you see today may already be different tomorrow. The Sun is not a stationary ball of light, but a dynamic star full of magnetic activity.