In the text, the “Parker Solar Probe” is:

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Parker Solar Probe: How Nasa is trying to 'touch' the Sun

   Nasa is all set to launch one of the most ambitious missions in its history. It's sending a satellite called the Parker Solar Probe into the Sun's outer atmosphere, or corona. Scheduled for launch on Saturday, the spacecraft promises to crack some longstanding mysteries about our star's behaviour.

(Adapted from: https://www.bbc.com/news/av/science-environment-45113552).