AP/NASA
In this March 3, 2011 photo provided by NASA, inside the U.S. lab Destiny, 12 astronauts and cosmonauts take a break from a very busy week aboard the International Space Station to pose for a joint STS-133/Expedition 26 group portrait. The STS-133 crew members, all attired in red shirts, from left, are NASA astronauts Nicole Stott, Alvin Drew, Eric Boe, Steve Lindsay, Michael Barratt and Steve Bowen. The dark blue-attired Expedition 26 crew members, from left, are European Space Agency astronaut Paolo Nespoli, along with Russian cosmonauts Oleg Skripochka, Dmitry Kondratyev, below, and Alexander Y. Kaleri and astronauts Scott Kelly and Cady Coleman, below. Serving the STS-133 and Expedition 26 missions as commanders were Lindsay and Kelly, respectively.
By
updated 3/6/2011 5:26:59 PM ET 2011-03-06T22:26:59

Less than 24 hours before the space shuttle Discovery departs the International Space Station, the shuttle crew and the astronauts living onboard the space station joined together for a special farewell ceremony Sunday to commemorate the end of a successful joint mission, and to celebrate Discovery's final visit to the orbiting outpost.

Discovery's six astronauts, clad in blue mission shirts, and the six station crewmembers of Expedition 26, dressed in green mission shirts, met for an official farewell in the U.S. Destiny Laboratory. The ceremony got underway shortly after 3:30 p.m. EST (2030 GMT). [Photos: Shuttle Discovery's Final Mission]

"It was a pleasure to be up here," shuttle commander Steve Lindsey said. "We appreciate your hospitality. On behalf of the crew, we had a great time. We're going to miss you guys."

Station commander Scott Kelly also said a few words on behalf of his crew.

"It was very successful time onboard with you guys," Kelly said. "We really enjoyed having guests — this is the first group of guests I've had in 150 days since I've been here. We're going to miss you."

With Discovery set to undock from the space station early tomorrow morning, Kelly also spoke about the workhorse orbiter's legacy and the significance of its final time journeying to the International Space Station.

"We're going to miss Discovery," Kelly said. "Discovery has been a great ship, and has really supported the International Space Station, more so than any other space shuttle, and we wish her fair winds and following seas."

Lindsey and Kelly then shook hands, and the two crews shared some laughs as cosmonaut and station flight engineer Dmitry Kondratyev captured some last group pictures.

Members of mission control at NASA's Johnson Space Center also expressed their thanks and gratitude to Discovery's crewmembers.

"I did want to take the opportunity to say it's been an honor and privilege to work this mission with you," said space station lead flight director Royce Renfrew. "I feel really proud to take Discovery home at the very top of her game. A lot of credit goes to the onboard crew. You guys rock."

On behalf of his fellow astronauts, Lindsey thanked the ground teams in return for their hard work.

"We're really proud of you guys and the amount of teamwork it takes to pull this kind of mission off," Lindsey said. "It was an incredible effort on your part — you guys are really the unsung heroes in this. I would imagine these last couple of days were the two busiest days in the space station program. All your folks that have worked on this, on both programs, should be very proud."

Renfrew wished the astronauts a safe journey back to Earth.

"You guys have a safe trip home," Renfrew said. "We're looking forward to seeing all of y'all home on terra firma."

AP/NASA/ESA
In this March 3, 2011 photo provided by NASA, astronauts Eric Boe, left, and Scott Kelly move the crate containing Robonaut 2, better known as R2, the first humanoid robot in space, at the International Space Station.

The spaceflyers then exited the Destiny Laboratory to the station's Node 2, where Discovery's astronauts said their final goodbyes with handshakes and hugs, before traveling through the tunnel back onto their spaceship.

This morning, flight controllers had some fun in their morning messages sent to the crewmembers, writing: "Just a friendly reminder — before closing the hatch tonight, make sure everything and everybody is on the correct side!"

The forward hatch between Discovery and the space station was sealed at 4:11 p.m. EST (2111 GMT). The shuttle astronauts will spend the night sleeping onboard Discovery before undocking from the station tomorrow morning. Discovery is scheduled to land at NASA's Kennedy Space Center in Florida on Wednesday, March 9, at 11:58 a.m. EST (1658 GMT).

Discovery's 13-day STS-133 mission is the last flight of the orbiter's career, after 39 trips into space, including 13 visits to the International Space Station. After this mission and 27 years of spaceflight, the shuttle Discovery will be retired from service, as NASA brings its space shuttle program to an end later this year.

NASA has two final shuttle missions planned — Endeavour's STS-134 mission in April, and the final STS-135 flight of Atlantis in June.

You can follow SPACE.com Staff Writer Denise Chow on Twitter @denisechow as she covers Discovery's final space voyage from NASA's Johnson Space Center in Houston. Visit SPACE.com for complete coverage of Discovery's final mission STS-133.

© 2013 Space.com. All rights reserved. More from Space.com.

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Photos: Month in Space: April 2013

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  1. The view from space

    This view from the International Space Station shows the sun heading toward the horizon over southwestern Australia on April 2, 2013. The space station's solar panels loom in the foreground. (Commander Chris Hadfield / CSA via AFP - Getty Images) Back to slideshow navigation
  2. Horsehead of a different color

    The Horsehead Nebula takes on an eerie glow in an infrared image from the Hubble Space Telescope. This picture, released April 21, marks the 23rd anniversary of the famous observatory's launch in 1990 aboard the space shuttle Discovery. (NASA / ESA / Hubble Heritage Team via EPA) Back to slideshow navigation
  3. Tight quarters

    Italian astronaut Luca Parmitano (right), NASA astronaut Karen Nyberg (left) and Russian cosmonaut Fyodor Yurchikhin get their picture taken inside a Soyuz capsule simulator during a training exercise at Russia's Star City complex outside Moscow on April 26. The three spacefliers are scheduled to head for the International Space Station in May. (Sergei Remezov / Reuters) Back to slideshow navigation
  4. Blazing sun

    This full-disk view of the sun was captured by NASA's Solar Dynamics Observatory on April 11, during the strongest solar flare yet seen in 2013. The colors reflect the intensity of emissions in extreme ultraviolet wavelengths. (NASA / SDO) Back to slideshow navigation
  5. Evil eye

    Mountain ridges near San Alberto in Mexico look like a reptilian eye in this view from the International Space Station. Canadian astronaut Chris Hadfield uses a different metaphor: "A Dali watch on an alligator wristband." The picture was taken on April 15 and shared via social media on April 25. (Commander Chris Hadfield / Canadian Space Agency) Back to slideshow navigation
  6. Russian rocket's red glare

    A Russian Soyuz rocket blasts away from its launch pad at the Baikonur Cosmodrome in Kazakhstan on March 29, sending NASA astronaut Chris Cassidy and Russian crewmates Pavel Vinogradov and Alexander Misurkin toward the International Space Station for their six-month orbital tour of duty. (Sergei Ilnitsky / EPA) Back to slideshow navigation
  7. Fun with rockets

    Children hold self-made rocket models during a show in front of the Peter and Paul Fortress in St. Petersburg, Russia, on April 14. The gathering was part of the festivities surrounding Cosmonautics Day on April 12. The Russian holiday marks the anniversary of Soviet cosmonaut Yuri Gagarin's historic spaceflight in 1961 - an occasion marked in other countries as "Yuri's Night." (Alexander Demianchuk / Reuters) Back to slideshow navigation
  8. Strokes in the Sahara

    Geological formations take on an alien look in a picture of the southern Sahara in Mauritania, taken on March 19 from the International Space Station and shared via social media on April 24. Canadian astronaut Chris Hadfield calls the scene "effortless natural art." (Commander Chris Hadfield / Canadian Space Agency) Back to slideshow navigation
  9. Stars in the cloud

    This glittering picture shows X-ray emissions from young sunlike stars in the "wing" of the Small Magellanic Cloud, a satellite galaxy associated with the larger Milky Way. The Small Magellanic Cloud lies about 180,000 light-years from Earth. In this April 4 picture, readings from the Chandra X-ray Observatory are shown in purple; visible light seen by the Hubble Space Telescope is in red, green, and blue; and infrared readings from the Spitzer Space Telescope are indicated in red. (NASA via Reuters) Back to slideshow navigation
  10. A blast on Mars

    This image from the high-resolution camera on NASA's Mars Reconnaissance Orbiter shows a relatively youthful crater with dark-rayed ejecta, plus a light-toned zone that extends beyond that ejecta. The picture was taken in 2009, but it was released along with other images from the High Resolution Imaging Science Experiment, or HiRISE, on April 3, 2013. Watch a video about the crater (NASA/JPL/University Of Arizona) Back to slideshow navigation
  11. A new rocket rises

    Orbital Sciences Corp.'s Antares rocket rises for the first time from its launch pad on April 21 at the Mid-Atlantic Regional Spaceport on Wallops Island, Va. This practice launch was aimed at testing the rocket for what's expected to be regular cargo deliveries to the International Space Station (Terry Zaperach / NASA Wallops via AP) Back to slideshow navigation
  12. Storm over the Middle East

    An image from NASA's Terra satellite shows a thick plume of dust blowing over the eastern Mediterranean Sea on April 1. The clouds spread over Israel, the West Bank, Cyprus and Turkey in a giant, counterclockwise arc. (NASA via AFP - Getty Images) Back to slideshow navigation
  13. Blue heaven

    A March 27 photo from the European Southern Observatory shows the bright open star cluster NGC 2547, as seen by the Wide Field Imager on the MPG/ESO 2.2-meter telescope at the La Silla Observatory in Chile. Many remote galaxies can be seen between the bright stars, far away in the background of the image. (ESO via AFP - Getty Images) Back to slideshow navigation
  14. Ready for a rocket ride

    Launch crew members check NASA astronaut Chris Cassidy's spacesuit just before his March 28 launch to the International Space Station. Russian cosmonauts Pavel Vinogradov and Alexander Misurkin joined Cassidy in a Soyuz capsule for a quick six-hour ride to the station. (Ramil Sitdikov / Ria Novosti / EPA) Back to slideshow navigation
  15. A supersonic leap

    Virgin Galactic's SpaceShipTwo lights up its rockets for the first time in flight on April 29. Afterward, the company said in a tweet that the pilots confirmed "SpaceShipTwo exceeded the speed of sound on today's flight!" The reported maximum velocity was Mach 1.2. Virgin Galactic plans to send paying passengers on suborbital space trips on a regular basis. (MarsScientific.com / Clay Center Observatory via EPA) Back to slideshow navigation
  16. Where stars are born

    An enormous stellar nursery known as W3 shines in infrared light, as shown in a March 27 image from the European Space Agency's Herschel space observatory. W3 lies about 6,200 light-years away in the Perseus Arm, one of the Milky Way galaxy's main spiral arms. In this image, low-mass stars are seen as tiny yellow dots embedded in cool red filaments. In contrast, high-mass stars emit intense radiation that heats up the gas and dust around them. Those hot regions are shown here in blue. (ESA via AFP - Getty Images) Back to slideshow navigation
  17. Crazy quilt

    The rugged landscape of Iytwelepenty/Davenport Murchison National Park in the Australian Outback is "crazily beautiful" when seen from outer space, Canadian astronaut Chris Hadfield says. Hadfield sent down this picture from the International Space Station on April 21. (Commander Chris Hadfield / Canadian Space Agency) Back to slideshow navigation
  18. A comet's glow

    Comet ISON takes on a fuzzy glow in an April 10 image from the Hubble Space Telescope. This picture was taken when the comet was 394 million miles from Earth, but Comet ISON is expected to get much closer. Some skywatchers hope it will become bright enough to rank as the "Comet of the Century." (J.-Y. Li (PSI) / NASA / ESA) Back to slideshow navigation
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