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Science News For Kids – MAVEN Spacecraft in Orbit Around Mars
This week saw an exciting announcement from the US space agency, NASA with the safe arrival of its MAVEN spacecraft in orbit around Mars. But how did it get there and what is its mission?
Gentry or Servant? Which Would You Choose To Be? – Written By You
You will all know what a ‘servant’ is, I am sure – Perhaps your Mum says that sometimes when you ask her to do too much for you ‘Do you think I am your servant?’ 🙂
Do you know we mean when we say ‘the gentry’? According to this website
The gentry were the people who were knights, squires, gentlemen and gentlewoman whose fortunes were great that they did not have to work with their hands for a living. Their numbers grew rapidly and became the most important class during Elizabethan time. They could start as a knight and through generations and marriages, they could gradually build a wealth and title. Most of the important people of this time came from this class.
Back in Tudor times (between 1485 and 1603), a person couldn’t choose to be born into the gentry. Today groups of people all over the world get together to reenact various periods of history, including the Tudor period.
Alison has been on both sides of the gentry/servant divide and tells us all about reenactments, making your own clothes and living like a Tudor girl, at least for a weekend.
A Trip to Mars!
Imagine being able to catch a flight to Mars as easily as we travel to another country – that was the idea behind the Trip To Mars session I attended at the Cheltenham Science Festival. It was conducted by Dr Suze Kundu and Dr Simon Foster and presented as a pre-flight safety briefing, with both of them dressed as pilots! There were a lot of humorous moments and sci-fi references but also some great science.
Suze and Simon suggested that in the future, flights to Mars could be far quicker than they are now, and explored how some of the bigger problems could be overcome. For example, the Sun’s magnetic field deflects a significant proportion of the cosmic radiation that could be harmful to humans on Earth; as spaceships travel further away from the Earth and Sun they will have less protection because the magnetic field weakens. To combat this it’s possible that spaceships will contain or be covered with large and powerful magnets, to produce the same deflective effect. This would have the added advantage of also deflecting radiation from solar flares.
Spaceships journeying to Mars would travel at such speed that even tiny fragments of rock and dust could be damaging to the hull. To combat this, and also the heat generated when the spaceship passes through an atmosphere, Suze and Simon discussed the possibility of spaceships being coated in aerogel. This amazing material is a solid formed from silicone dioxide but is 98% air; this means that it is extremely light but also strong. Its melting point is 1,200°C (equivalent to asbestos) and it is a wonderful insulator. Because it consists of large pockets of air between thin layers of silicone dioxide, any dust or rock fragments that hit it would be slowed and stopped before they could penetrate the aerogel completely.
Suze and Simon also discussed the possibilities and problems with cryostasis. Theoretically this is when a person’s body is cooled to temperatures so low that they enter hibernation, ideal for long journeys through space. Unfortunately our technology isn’t advanced enough to do this at the moment; any attempt would result in the cells rupturing and the person dying. But in the future it will be possible, perhaps after the person’s DNA has been altered slightly so that they can produce antifreeze proteins like some species of wasps and turtles.
Can Too Much Screen Time Damage Your Eyes?
I bet you’ve heard some adults warn that too much screen time can damage your eyes. Some even say that sitting too close to a screen can be harmful. This is an idea that’s been around for decades but is there any truth to it?
In the latest of our Fact or Fable series, Sam investigates.
Top to Bottom – Written By You
