And it helps that the missions are going to a similar place: a sun-synchronous orbit around Earth’s poles, meaning each spacecraft keeps the same orientation relative to the sun throughout the year.

The agency’s PUNCH mission caught a ride to Earth orbit with SPHEREx, which will map the entire sky to learn more about what ...

And it helps that the missions are going to a similar place: a sun-synchronous orbit around Earth’s poles, meaning each spacecraft keeps the same orientation relative to the sun throughout the year.

We now know that this apparent retrograde motion happens because Earth is constantly moving in its orbit. As our planet ... That situation is called "sun-synchronous" and would force one side ...

It stands at 82 feet (25 meters) tall and can deliver a payload of up to 474 pounds (215 kilograms) to a 310-mile-altitude (500 kilometers) sun-synchronous orbit. Eris consists of three stages and ...

The two missions are designed to operate in a low Earth, Sun-synchronous orbit over the day-night line (also known as the terminator) so the Sun always remains in the same position relative to the ...