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This week’s new questions

What is the best way to stack a dishwasher? And when will all the planets in our solar system align, as seen from earth?

Open dishwasher with clean utensils in it; Shutterstock ID 218515030; purchase_order: -; job: -; client: -; other: -

Is there a correct way to fill a dishwasher to maximise capacity and cleanliness?

Conor McKeating,

Dublin, Ireland

MNN37P Illustration comparing the planets of the Solar System and the Sun on the same scale. The planets are shown to scale relative to each other but their distances are not. From left to right the bodies are: the Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
MARK GARLICK/SCIENCE PHOTO LIBRARY/Alamy

Will there ever be a time when all the planets of our solar system line up in a row, one behind the other, as seen from Earth?

Sue McLennan,

Parkes, New South Wales, Australia

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