What is the name of the spacecraft launched in the year 2004 which would fly by Earth,Venus and Mercury several times and circle the Sun 15 times ?

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Q: 8 (CDS-I/2006)
What is the name of the spacecraft launched in the year 2004 which would fly by Earth,Venus and Mercury several times and circle the Sun 15 times ?

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,11,9,2,11,2,5

keywords: 

{'spacecraft': [0, 0, 2, 2], 'rover': [0, 0, 0, 1], 'venus': [1, 0, 2, 0], 'ranger': [0, 0, 1, 0], 'sun': [3, 0, 0, 6], 'mercury': [0, 0, 2, 2], 'marker': [0, 0, 1, 0], 'earth': [0, 1, 1, 1], 'year': [27, 4, 33, 49]}

Option 1: Marker

This option is incorrect. There is no spacecraft named "Marker" that was launched in 2004 for the mentioned mission. Therefore, this option can be eliminated.

Option 2: Messenger

This option is correct. Messenger is the name of the spacecraft that was launched in 2004. It was designed to study the planet Mercury by flying by Earth, Venus, and Mercury several times. It also circled the Sun 15 times during its mission. Messenger provided valuable data and insights about Mercury, including its composition, geology, and magnetic field.

Option 3: Ranger

This option is incorrect. Ranger was a series of spacecraft launched in the 1960s by NASA. They were designed to take close-up pictures of the Moon, not to study planets like Earth, Venus, and Mercury. Therefore, this option can be ruled out.

Option 4: Rover

This option is incorrect. Rovers are robotic vehicles used for exploring planetary surfaces. They are not designed to fly by different planets or circle the Sun. Therefore, this option can be eliminated.

Overall, the correct answer to this question is Option 2: Messenger.