He says there are more than three hundred thousand small objects or pieces of debris in orbit that are larger than one centimeter.

VOA: special.2009.04.01

He would wait in orbit around the moon while Armstrong and Aldrin landed and explored the surface.

VOA: special.2009.07.15

Because of the gravity on Mars, spacesuits may have to be designed to be lighter than suits used in orbit or on the moon.

VOA: special.2011.04.06

And they broadcast, for the first time, live television pictures of men in orbit.

VOA: special.2009.07.08

Before the collision, Iridium had a group of sixty-six satellites in orbit.

VOA: special.2009.04.01

John Glenn was in orbit one hundred sixty kilometers above the Earth.

VOA: special.2009.06.17

Schirra and Stafford proved that spaceships could link up while in orbit.

VOA: special.2009.07.01

By the third day in orbit, all was normal again.

VOA: special.2009.06.24

And next year, the country is launching a small space lab to practice docking in orbit - an essential part of manned missions to the Moon and Mars.

VOA: standard.2010.04.21

Small changes in the movement of Neptune led several astronomers to believe that an undiscovered planet was affecting Neptune's orbit.

VOA: special.2010.07.11

The radio waves are measured when the earth is at two points opposite one another in its orbit.

VOA: special.2009.01.20

Gemini Six followed Gemini Seven, but in a lower orbit that moved the two spacecraft closer together.

VOA: special.2009.07.01

Iran launched its first satellite into orbit in February -- the thirtieth anniversary of the Islamic revolution.

VOA: special.2009.05.23

The timing would put the two spacecraft in the correct orbit to meet in space.

VOA: special.2009.07.01

Schirra fired a rocket exactly long enough to put his spacecraft in the same orbit.

VOA: special.2009.07.01

And he says five of the planetary candidates are both close to the size of Earth and orbit in the habitable area of their parent stars.

VOA: special.2011.02.09

In nineteen fifty-seven, a Soviet military rocket carried a small satellite into Earth orbit.

VOA: special.2009.06.10

And they placed a small satellite in lunar orbit before they returned to Earth.

VOA: special.2009.07.29

The number of man-made objects in Earth orbit has been growing each year.

VOA: special.2009.04.01

The Hubble Space Telescope was launched into orbit in April of nineteen ninety.

VOA: special.2009.09.30

We think of the telescope as moving slowly in its orbit.

VOA: special.2009.09.30