
The above image was taken by a spacecraft travelling through the Solar System while it was at a distance of 251 million kilometres (156 million miles) from Earth – more than the distance between Earth and the Sun by nearly half again.
It was snapped by NASA and the European Space Agency’s Solar Orbiter, a mission to study the Sun, on 18 November 2020, while en route to its destination. It joins a burgeoning tradition of photos of Earth taken by instruments far beyond where humans ourselves can venture.
But it’s not just Earth in Solar Orbiter’s image; Venus and Mars make an appearance, too, 48 million and 332 million kilometres from the spacecraft, respectively. It’s a lovely family portrait when you think about it – three rocky planets, so similar in many ways, but so very different from each other – seen through a scientific instrument – the Heliospheric Imager – designed to study the heart of the Solar System.
https://www.sciencealert.com/photo-snapped-by-solar-orbiter-shows-venus-earth-and-mars-gleaming-like-stars