A Delta II rocket, initially intended to launch the Spitzer Space Telescope on April 18, 2003. However, due to additional engineering tests that were needed on the rocket, the launch was delayed and the rocket was instead used to launch a Mars mission. Spitzer launched on a different rocket on August 25, 2003.

A Delta II rocket, initially intended to launch the Spitzer Space Telescope on April 18, 2003. However, due to additional engineering tests that were needed on the rocket, the launch was delayed and the rocket was instead used to launch a Mars mission. Spitzer launched on a different rocket on August 25, 2003.

A Delta II rocket, initially intended to launch the Spitzer Space Telescope on April 18, 2003. However, due to additional engineering tests that were needed on the rocket, the launch was delayed and the rocket was instead used to launch a Mars mission. Spitzer launched on a different rocket on August 25, 2003.

A Delta II rocket, initially intended to launch the Spitzer Space Telescope on April 18, 2003. However, due to additional engineering tests that were needed on the rocket, the launch was delayed and the rocket was instead used to launch a Mars mission. Spitzer launched on a different rocket on August 25, 2003.

A Delta II rocket, initially intended to launch the Spitzer Space Telescope on April 18, 2003. However, due to additional engineering tests that were needed on the rocket, the launch was delayed and the rocket was instead used to launch a Mars mission. Spitzer launched on a different rocket on August 25, 2003.

A Delta II rocket, initially intended to launch the Spitzer Space Telescope on April 18, 2003. However, due to additional engineering tests that were needed on the rocket, the launch was delayed and the rocket was instead used to launch a Mars mission. Spitzer launched on a different rocket on August 25, 2003.

A Delta II rocket, initially intended to launch the Spitzer Space Telescope on April 18, 2003. However, due to additional engineering tests that were needed on the rocket, the launch was delayed and the rocket was instead used to launch a Mars mission. Spitzer launched on a different rocket on August 25, 2003.

A Delta II rocket, initially intended to launch the Spitzer Space Telescope on April 18, 2003. However, due to additional engineering tests that were needed on the rocket, the launch was delayed and the rocket was instead used to launch a Mars mission. Spitzer launched on a different rocket on August 25, 2003.

A Delta II rocket, initially intended to launch the Spitzer Space Telescope on April 18, 2003. However, due to additional engineering tests that were needed on the rocket, the launch was delayed and the rocket was instead used to launch a Mars mission. Spitzer launched on a different rocket on August 25, 2003.

A Delta II rocket, initially intended to launch the Spitzer Space Telescope on April 18, 2003. However, due to additional engineering tests that were needed on the rocket, the launch was delayed and the rocket was instead used to launch a Mars mission. Spitzer launched on a different rocket on August 25, 2003.

A Delta II rocket, initially intended to launch the Spitzer Space Telescope on April 18, 2003. However, due to additional engineering tests that were needed on the rocket, the launch was delayed and the rocket was instead used to launch a Mars mission. Spitzer launched on a different rocket on August 25, 2003.