Explorer 1 (1958 Alpha 1) was the first Earth satellite of the United States, launched as part of its participation in the International Geophysical Year. The mission followed the first two Earth satellites the previous year, the Soviet Union's Sputnik 1 and 2, beginning the Cold War Space Race between the two nations.

Explorer 1 was launched on January 23, 1958 at 22:48 Eastern Time (equal to February 1, 03:48 UTC) atop the first Juno booster from LC-26 at the Cape Canaveral Missile Annex, Florida. It was the first spacecraft to detect the Van Allen radiation belt, returning data until its batteries were exhausted after nearly four months. It remained in orbit until 1970, and has been followed by more than 90 scientific spacecraft in the Explorer series.

The U.S. Earth satellite program began in 1954 as a joint U.S. Army and U.S. Navy proposal, called Project Orbiter, to put a scientific satellite into orbit during the International Geophysical Year. The proposal, using a military Redstone missile, was rejected in 1955 by the Eisenhower administration in favor of the Navy's Project Vanguard, using a booster produced for civilian space launches. Following the launch of the Soviet satellite Sputnik 1 on October 4, 1957, the initial Project Orbiter program was revived as the Explorer program to catch up with the Soviet Union.

Dora the Explorer is an American animated television series created by Chris Gifford, Valerie Walsh, and Eric Weiner. Dora the Explorer became a regular series in 2000. The show is carried on the Nickelodeon cable television network, including the associated Nick Jr. channel. It aired on CBS until September 2006. A Spanish-dubbed version first aired as part of a Nick en español block on NBC Universal-owned Telemundo through September 2006; since April 2008, this version of the program has been carried on Univision as part of the Planeta U block.

Dora, the main character, is an eight-year-old girl who embarks on a trip in every episode in order to find something or help somebody. She asks the viewers at home to help her find new ways to reach places with the help of Map. She also teaches viewers Spanish, introducing them to short words and phrases.

Dora has a positive view of the characters she meets, failing even to hold a grudge against the mischievous fox, Swiper, who continually attempts to steal items from her party. She acts against villains only when it seems that compromise is impossible, and even in these cases, fails to display actual anger. She gives others a chance to try their hands at tasks even when she herself might have an easier time with them. Dora values her family, whom she loves openly, though she spends little time indoors at home with them. She tries to introduce her traditions and customs, subtly and without compulsion, to those who are not familiar with them.