Detailed Instructions: In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.
Problem:Passage: Although no planetary probes were launched in 2009, four astronomical observatories were placed into orbit. The Kepler spacecraft, which was launched by a Delta II on 7 March, entered an Earth-trailing heliocentric orbit from where it will search for exoplanets. On 14 May, and Ariane 5ECA launched the Herschel and Planck spacecraft. Both were placed at the L Lagrangian point between the Earth and Sun, from where they will be used for astronomy. Herschel carries an infrared telescope whilst Planck carries an optical one. The fourth observatory to be launched was the Wide-field Infrared Survey Explorer, or WISE, which is a replacement for the Wide Field Infrared Explorer which failed shortly after launch. WISE was launched into a sun-synchronous orbit by a Delta II on 14 December, and will be used for infrared astronomy. Repairs made to the Hubble Space Telescope during STS-125 restored it to full operations after a series of malfunctions in 2008.
 Link Information: The spacecraft, built in the Cannes Mandelieu Space Center, under Thales Alenia Space Contractorship, was successfully launched from the Guiana Space Centre in French Guiana at 13:12:02 UTC on 14 May 2009 Answer: Herschel
Solution:
Between the Hershel and Planck spacecrafts, which one was launched first?