Instructions: In this task, you will be shown a passage. You need to write a fill-in-the-gap question based on your understanding of the events that might be inferred from the passage. Your question should be answerable based on the passage and only have one correct answer. Show the gap in your question with a _ .
Input: Pluto is almost ready for its close up. After nine and a half years and three billion miles, the New Horizons spacecraft is about to lift the veil on the icy world. It promises to be the biggest planetary debut in a quarter-century. The curtain hasn't been pulled back like this since the Voyager 2 flew past Neptune in 1989. For principal investigator, Alan Stern, this is the culmination of 15 years of hard work and endless campaigns to launch missions to the dwarf planet. 'The adrenaline is intense at the moment,' Stern told DailyMail.com. '[I'm] literally sleeping four hours a night and feeling great.'New Horizons will make its closest to Pluto at 7:49 a.m. EDT tomorrowPrincipal investigator, Alan Stern, has spent 15 years working on missionPluto has taught us 'that our view of the solar system is wrong', said SternDwarf planet is thought to be a relic left from formation of the solar systemFirst close-up images will be sent back to Earth on Wednesday morning
Output:
They also plan to measure the temperature and pressure in _'s nitrogen-rich atmosphere and determine how much gas is escaping into space.