For the first time, visitors can get a closer look at launchpads at Kennedy Space Center thanks to special tours marking the center's 50th anniversary. The launchpad tours started in July and are likely to be offered only through the end of the year.
Separate tours of the Launch Control Center are also available this year.
Each of three special up-close tours is offered for a $25 add-on to the regular cost of admission.
The space center's Vehicle Assembly Building, right, towers over the Launch Control Center, left, at Kennedy Space Center.
The space shuttle Atlantis is on view in the Vehicle Assembly Building until August 16, when it will start getting prepared for its new home opening later this year in the space center's visitor complex.
Kennedy Space Center
Kennedy Space Center
Kennedy Space Center
Kennedy Space Center
Kennedy Space Center
STORY HIGHLIGHTS
- Up-close tours mark 50th anniversary of Kennedy Space Center
- The latest rare-access tour offers a look at one of the launchpads
- The tours are expected to be offered through the end of the year
(CNN) -- Wearing a floppy hat, 3-year-old Thor does his best rendition of a rocket launch countdown, "three, two, one, zero -- blast off" and jumps up in the air next to a Florida launchpad where NASA rockets have blasted off for more than 50 years.
Apollo missions took the first men to the moon, space shuttles carried the Hubble Space Telescope and the International Space Station into space -- all on rockets taking off from two launchpads at Kennedy Space Center, an hour east of Orlando.
Thor, his twin brother, Espen, and his mother, Diane, are on a tour inside launchpad 39A's security fence at Kennedy -- something that has never been allowed in the history of the space center -- until now.
The Launch Pad Tour, introduced in July, is one of three new rare-access tours being offered this year to celebrate Kennedy Space Center's 50th anniversary. In addition to getting an up-close look at the launchpad, visitors can also tour the Vehicle Assembly Building and the Launch Control Center with a space expert guide.

Water-ice clouds, polar ice and other geographic features can be seen in this full-disk image of Mars from 2011. NASA's Mars Curiosity Rover touched down on the planet on August 6. Take a look at stunning photographs of Mars over the years. Check out images from the Mars rover Curiosity.
This image was captured in 1976 by Viking 2, one of two probes sent to investigate the surface of Mars for the first time. NASA's Viking landers blazed the trail for future missions to Mars.
The Valles Marineris rift system on Mars is 10 times longer, five times deeper and 20 times wider than the Grand Canyon. This composite image was made from NASA's Mars Odyssey spacecraft, which launched in 2001.
The Nili Fossae region of Mars is one of the largest exposures of clay minerals discovered by the OMEGA spectrometer on Mars Express Orbiter. This image was taken in 2007 as part of a campaign to examine more than two dozen potential landing sites for NASA's new Mars rover, Curiosity, also known as the NASA Mars Science Laboratory.
NASA's Mars Phoenix Lander descends to the surface of Mars in May 2008. Fewer than half of the Mars missions have made successful landings.
Phoenix's robotic arm scoops up a sample on June 10, 2008, the 16th Martian day after landing. The lander's solar panel is seen in the lower left.
In 2006, NASA's Mars Exploration Rover Spirit captured a 360-degree view known as the McMurdo panorama. The images were taken at the time of year when Mars is farthest from the sun and dust storms are less frequent.
The European Space Agency's Mars Express captured this view of Valles Marineris in 2004. The area shows mesas and cliffs as well as features that indicate erosion from flowing water.
This view is a vertical projection that combines more than 500 exposures taken by Phoenix in 2008. The black circle on the spacecraft is where the camera itself is mounted.
A portion of the west rim of the Endeavour Crater sweeps southward in this view from NASA's Mars Exploration Rover Opportunity in 2011. The crater is 22 kilometers (13.7 miles) across.
A photo captured by NASA's Mars Global Surveyor in 2000 offers evidence that the planet may have been a land of lakes in its earliest period, with layers of Earth-like sedimentary rock that could harbor the fossils of any ancient Martian life.
A U.S. flag and a DVD containing a message for future explorers of Mars, science fiction stories and art about the planet, and the names of 250,000 people sit on the deck of Phoenix in 2008.
A rock outcrop dubbed Longhorn and the sweeping plains of the Gusev Crater are seen in a 2004 image taken by the Mars Exploration Rover Spirit.
Although it is 45 kilometers (28 miles) wide, countless layers of ice and dust have all but buried the Udzha Crater on Mars. The crater lies near the edge of the northern polar cap. This image was taken by NASA's Mars Odyssey Orbiter in 2010.
NASA's Opportunity examines rocks inside an alcove called Duck Bay in the western portion of the Victoria Crater in 2007.
Pictured is a series of troughs and layered mesas in the Gorgonum Chaos region of Mars in 2008. This photo was taken by Mars Orbiter Camera on the Mars Global Surveyor.
An image captured in 2008 by NASA's Mars Reconnaissance Orbiter shows at least four Martian avalanches, or debris falls, taking place. Material, likely including fine-grained ice and dust and possibly large blocks, detached from a towering cliff and cascaded to the gentler slopes below.
This 2008 image spans the floor of Ius Chasma's southern trench in the western region of Valles Marineris, the solar system's largest canyon. Ius Chasma is believed to have been shaped by a process called sapping, in which water seeped from the layers of the cliffs and evaporated before it reached the canyon floor.
Pictured is the Martian landscape at Meridiani Planum, where the Mars Exploration Rover Opportunity successfully landed in 2004. This is one of the first images beamed back to Earth from the rover shortly after it touched down.
An image from the Mars Global Surveyor in 2000 shows potential evidence of massive sedimentary deposits in the western Arabia Terra impact crater on the surface of Mars.
The Mars Reconnaissance Orbiter captures a dust devil blowing across the Martian surface east of the Hellas impact basin in 2007. Dust devils form when the temperature of the atmosphere near the ground is much warmer than that above. The diameter of this dust devil is about 200 meters (650 feet).
Soft soil is exposed when the wheels of NASA's Mars Exploration Rover Spirit dig into a patch of ground dubbed Troy in 2009.
An image from NASA's Mars Reconnaissance Orbiter shows the floor of the Antoniadi Crater in 2009.
The larger of Mars' two moons, Phobos, is seen in 2008 from the Mars Reconnaissance Orbiter.
Earth and the moon are seen in 2007 from the Mars Reconnaissance Orbiter. At the time the image was taken, Earth was 142 million kilometers (88 million miles) from Mars.
Exploring Mars
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Photos: Exploring Mars
"Are you a space nut or were you forced to accompany one?" a tour guide asks laughing guests on a bus taking them to the space center recently for one of the new tours.
Photos: Earth's otherworldy landscapes
Space nut or not, you'll be amazed by the size of the Vehicle Assembly Building -- or VAB, if you want to sound like a NASA aficionado. The rocket hanger is one of the largest enclosed spaces in the world. The 525-foot-tall building with the huge NASA logo and American flag painted on the side can be seen for miles on the ground and in the air -- look for it while flying over central Florida.
Built in the 1960s, the hanger was designed to handle the assembling of huge Saturn V rocket segments during the Apollo missions. Later the space shuttle program used the assembly building to attach the shuttles to a large orange external fuel tank and two white rockets used during launch.
Once inside the large cavernous building, look up to the ceiling where shuttle mission banners filled with the signatures of the personnel who worked on those missions hang from support beams.
As an added bonus, the shuttle Atlantis is parked inside the Vehicle Assembly Building just behind a fence only 25 feet away -- for now. The retired Atlantis is waiting to receive final preparations for public display.
"It's awesome to see it in real life," said Chris Finlay, 30, from New Castle, England, who was on vacation in Florida for three weeks. "It's not something you get to see every day."
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NASA says Atlantis will be moved to a shuttle hanger on August 16 -- switching places with shuttle Endeavour, which will remain inside the assembly building until mid-September when it will be transported to the California Science Center in Los Angeles for permanent public display.
Atlantis will be back in the VAB briefly before it moves to its new permanent home at the visitor complex. Still under construction, the new facility is expected to open to the public in July 2013.
Next to the tall Vehicle Assembly Building is the much smaller Launch Control Center with large windows looking to the east toward the launchpad. The control center is open to visitors for the first in more than 30 years.
Control center tours visit Firing Room 4, where Apollo and shuttle managers directed launches.
"There's a lot of responsibility in this room. It's not just one person who launches a space shuttle," said tour guide Rob English, pointing to a photo of the launch room that describes how the team works together.
"You'll feel the energy when you walk in this room," said English as the security officer opened the door.
Mars images from NASA's "Curiosity" Rover
Inside, workstations line the room with labels for each position's area of responsibility on top -- from Main Engines to Electrical Systems. At the front, overlooking the room, is the workspace labeled Launch Director.
Don't expect to see a launch button. Computers have launched rockets for years, though managers can override them. Next to work spaces for the launch director and the public affairs officer are large windows overlooking the launchpad.
"This is the window on mankind's future right here," says English, the guide, as we look out toward the launchpads, which appear much closer than three miles from the control center.
During the Launch Pad Tour, guests step out of a bus inside the last high barbwire fence surrounding the launchpad. The massive jumble of metal service structures used during the shuttle program sit on top of a white concrete mound.
Bill Jackson, a middle school science teacher who just moved to Florida from St. Louis, was glad for the opportunity to see the space center up close.
"Finally getting to see all the things that I told the kids about and my own children about for 50 years ... it's amazing," said Jackson.
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His friend Lila Steinhoff recalls watching launches as a girl on small black and white televisions.
"I'm seeing it in person. It's wonderful," said Steinhoff.
Jackson agreed, "It's better, you saw those grainy black and white pictures and something over Walter Cronkite's shoulder and now it's real."
The new tours are expected to run through the end of December 2012 and possibly into 2013. Each of the three tours costs an additional $25 for adults and $19 for children ages 3 to 11 beyond the entrance fee to the Kennedy Space Visitor Center, which is $45 for adults and $35 for children.