Make and launch your own rocket, control a space rover and speak to astronomers.
Fans of all things out of this world are invited to Astroday 2012 - organised by Sheffield Astronomical Society, Sheffield University Physics Society and Sheffield Amateur Radio Club.
The free event is being held on Saturday, from 2pm to 5pm at Norfolk Community Primary School, Guildford Avenue, Arbourthorne, as part of National Science and Engineering Week.
Visitors can make and launch their own stomp rocket, make a planet, find out what they weigh on Jupiter, hear talks on astronomy, control a Mars rover and talk to astronomers. Special solar telescopes will also be set up so people can safely see the Sun as never before.
The Radio Club will be there to let you talk to someone on the other side of the world - and possibly even an astronaut in the International Space Station.
A spokesman for the organisers said: “This event will let you get a taste for astronomy and learn some amazing facts about Earth, the solar system and beyond.”