How big is space?

Hull Libraries run a scheme every year over the summer holidays, aiming to get more children reading for pleasure. This year’s theme was SPACE! So we were honoured to be asked to launch their reading scheme with a day of planetarium shows on July 20th. It was also the 50th anniversary of the moon landings, so we delivered a full day of our planetarium show “One Giant Leap” which was extremely successful.

As a follow on to that we were honoured to be invited to give a talk at the reading scheme celebration event. The children who complete the reading scheme are invited to Hull City Hall for an afternoon of events.

We had to come up with a talk that would entertain children and adults from 5 years upwards on the subject of “space”, which is a really big subject!! So we decided to talk about “How big is space?”

The key to science communication is to make a subject understandable and enjoyable for your audience and that’s a challenge when your audience is so diverse. But we love a challenge!

We thoroughly enjoyed putting this show together! It was a little different to anything we’d done before! We’re used to talking about space under a dome of stars. Having stage lights pointed at us was a whole different experience.

Also performing on the day was the author of the Horrible Science books, Nick Arnold. Following Nick was a little daunting as he wowed the children with his experiments, stories and he had his own theme tune. *I need a theme tune*

And the compere for the event was actor Finley McGuigan, who did an amazing job of keeping everything running smoothly and storytelling!

Then it was my turn…

I started by looking at our own solar system and we worked out how far apart the planets are, using volunteers from the audience. We managed to fit the whole solar system in the City Hall auditorium but worked out that the next star would be at Buckingham Palace. I even had a volunteer to walk that far!

We then looked at the milky way and how our solar system is a tiny part of the galaxy.

I love the Hubble Deep Field image so I used this to illustrate the vastness of space even further. There are over 10,000 galaxies in this one image.

After the main event I had some meteorites to show the children, some of which were kindly loaned to me by author Stuart Atkinson. I also have a small collection, which includes tiny pieces of Mars and moon meteorites. The children were amazed that these were rocks that had fallen from space, as they held them in their hands.

Thanks for asking us to take part in your reading scheme this year Hull Libraries! We truly have had a blast!

We couldn’t take any photos ourselves of the event. All photos in the blog are taken by photographer Jerome Whittingham.

Have a great rest of your weekend!

Katie, Carol, Anita and Sarah

The Lab Rascals Team xx

Space Volcanoes!

We’ve been delivering some workshop for Public Libraries in Hull over the summer, on volcanoes of the solar system, in keeping with their reading scheme space theme. But how different can volcanoes actually be? The answer is, very! But the mechanism causing them to erupt is basically the same. It’s all about pressure building under the surface. That pressure has to balance and release somewhere. That’s when a volcanic eruption occurs.

Active volcanoes are those which are currently erupting or have erupted in human history. We mainly use this term in regards to volcanoes on Earth, but the most active place in our solar system is one of Jupiter’s moons. Io is the innermost of Jupiter’s moons and is a little larger than our moon, with a radius of 1,131 miles. It has over 400 active volcanoes on its surface, produced by the gravitational pull of Jupiter creating tidal heating inside Io. This means that Io is being pushed and pulled by Jupiter, which causes friction deep inside the moon and creates this volcanic activity. Although Io has an icy surface, lava erupts hundreds of miles above the surface due to this tidal heating and low gravity.

Composite pic of images taken by Voyager 1 showing Io erupting hundreds of miles above the surface.

Back to volcanoes on Earth. They erupt lava. They can occur on the surface of the Earth and also under the sea. Imagine that the Earth’s crust is a bit like a cracked eggshell. The pieces of the eggshell are the tectonic plates. Hotspots sometimes occur in the middle of the Earth’s tectonic plates and cause eruptions on the seabed with the lava cooling to rock. The hotspot itself is fixed but the plates move, sometimes creating a series of islands, like Hawaii!

Further out in the solar system where temperatures are extremely cold, a different kind of volcano occurs. Ice volcanoes. In the far reaches of the solar system on Pluto, where the temperatures are around -200 degrees C, ice volcanoes exist. Otherwise known as cryovolcanoes these icy giants tower around 3500 m above the surface of Pluto.

Pluto as imaged by the New Horizons spacecraft, showing an area of possible cryovolcanoes (Image credit: NASA)

Although we have no observations of cryovolcanoes erupting on Pluto, there is evidence to suggest that it could possibly be geologically active. So how do volcanoes erupt ice? Well, we’re not 100% sure but imagine geological activity inside bodies like Pluto have warmed the frozen surface into a Slush Puppy! The moving ice sheets grind together inside and expel this above the surface as a cryovolcano! Unfortunately our observations of Pluto were very brief as the New Horizons spacecraft whizzed by in 2015, so we didn’t actually see any eruptions! We saw the very first cryovolcano on Neptune’s moon Triton as Voyager 2 flew by in 1989.

Triton as imaged by Voyager 2 (Credit: NASA)

So Earth isn’t the only body of our solar system with volcanoes! We’ve also seen evidence of past volcanism on Mars, Venus and our very own moon! And the children in our workshops love learning about the different volcano types and designing their own!

If you haven’t managed to book onto the library sessions then we have spaces available on our own workshops (including volcanoes) in Hull, Scunthorpe and Beverley. Book online now!

Have a great weekend!

Katies, Carol, Anita and Lauren

The Lab Rascals Team xx