The first American satellite, lofted in 1958, weighed 10 pounds.

These satellites possess a substantially increased lifetime of seven years and weigh slightly more at 1,480 kg.

Each satellite weighed about 2000 kg, and returned a single film bucket per mission.

The satellite weighs approximately 1650 kg and is expected to have a life span of 5 years.

The tiny satellite was about a foot long, weighs 11 pounds and contained a transmitter.

The satellite is 33 feet long, weighs 5,200 pounds and has a powerful telescope for peering at the Earth.

The satellites would weigh approximately 1,330 kg and their solar panels generate 1,400 watts.

The entire satellite weighs at about 180 kg.

The new satellites typically weigh 500 pounds or less, measure two to five feet long, and cost from $1 million to $8 million.

Its first satellite, Explorer 1, launched on Jan. 31, 1958, weighed 10 pounds.