Penny Wozniakiewicz
Planetary scientist
Dr Penny Wozniakiewicz is a planetary scientist and space dust expert based at the University of Kent.
Recent articles by Penny Wozniakiewicz
Which planet and Solar System bodies have largest oceans?
What would happen if Earth stopped spinning? We asked a planetary scientist to find out
If Earth's spin gradually slowed down, it would have a profound impact on technology, weather and life itself.
Why Neptune is blue? A recent discovery suggests we've been given a false view of the planet for decades
What makes planet Neptune blue and why did a recent discovery claim its colour is actually more like Uranus's than conventionally thought?
Why is Venus the hottest planet, if Mercury is the closest to the Sun?
Mercury orbits closer to the Sun, so why isn't it hotter than Venus?
Where did Earth get its water from?
What are the origins of water in interstellar space, the Solar System and on Earth?
Where we find water in space and why it's so important
Astronomers seem determined to find water in space, but why? A guide to where we find water beyond Earth and why it's vital that we do.
What's the farthest planet from Earth?
Following Pluto's reclassification in 2006, Neptune is the farthest planet from Earth in our Solar System.
Why astronomers are searching for water beyond Earth
Why is finding water beyond Earth so important?
Why is Mars red?
What gives the soil on Mars its red colour, lending our planetary neighbour its moniker the Red planet?
What causes a meteor shower?
Where do meteors come from, and what causes a meteor shower? A guide to the science of shooting stars.
Why do astronomers study samples from other worlds?
How are samples from other worlds analysed by scientists, and what can we learn from them?