World's first reflown rocket booster - the SpaceX Falcon 9 first stage - sails back into Port Canaveral, FL just before sunrise atop OCISLY droneship on which it landed 9 minutes after March 30, 2017 liftoff from KSC with SES-10 telecomsat - as seen entering channels mouth trailing a flock of birds from Jetty Park pier on April 4, 2017. Credit: Ken Kremer/Kenkremer.com
PORT CANAVERAL/KENNEDY SPACE CENTER, FL - Basking in the sunrise glow, the world's first recycled booster - namely a SpaceX Falcon 9 - sailed serenely into Port Canaveral this morning, Tuesday, April 4, atop the tiny droneship on which it soft landed shortly after launching on March 30 for an unprecedented second time.
Shortly before sunrise, SpaceX's recovered Falcon 9 first stage triumphantly arrived on Tuesday at the mouth of Port Canaveral and the public pier at Jetty Park around 7 am - greeted by excited onlookers, media and space buffs eager to be an eyewitness to the first rocket to launch and land two times fully intact !
The milestone SpaceX mission to refly the first ever 'used rocket' blasted off right on time at the opening of the dinnertime launch window on Thursday, March 30, at 6:27 p.m. EDT.
The used two stage 229-foot-tall (70-meter) rocket carried the SES-10 telecommunications payload to orbit using a 'Flight-Proven' Falcon 9 rocket from seaside Launch Complex 39A at NASA's Kennedy Space Center (KSC) in Florida.
After the 156 foot tall first stage booster completed its primary mission task, SpaceX engineers successfully guided it to a second landing on the tiny Of Course I Still Love You - OCISLY - drone ship for a soft touchdown some eight and a half minutes after liftoff.
Check out this expanding gallery of eyepopping photos and videos from several space journalist colleagues and friends and myself - for views you won't see elsewhere.
Click back as the arrival gallery grows !
This recycled Falcon 9 first stage booster had initially launched a year ago in April 2016 for NASA on the SpaceX Dragon CRS-8 resupply mission to the International Space Station (ISS) under contract for the space agency.
Watch for Ken's continuing coverage direct from onsite at the Kennedy Space Center press site and Cape Canaveral Air Force Station.
Stay tuned here for Ken's continuing Earth and Planetary science and human spaceflight news.
Grab the tissues. This video nearly had the Cassini team all choked up during today's press briefing, and virtual sobs and sniffs were abundant on social media posts sharing the video.
"We get goosebumps and get emotional every time we see it," said Earl Maize, Cassini project manager at JPL.
On April 22 the Cassini spacecraft will begin its 'Grand Finale' — the beginning of the end of this tremendous mission that has provided breathtaking images and so many new discoveries of Saturn, its rings and moons. The mission will end on September 15, 2017, when it makes a dramatic plunge into the gas giant.
Here's the video that had everyone teary-eyed. Be prepared for some stunning visuals:
Today, Maize talked about how nineteen countries and three space agencies contributed to the success of the Cassini/Huygens mission, saying the mission has been truly an international triumph and a phenomenal achievement.
"Cassini's legacy is assured. We are in the books!" Maize said. "But the best is yet to come. We are going to dive into the gap between the rings of Saturn and Saturn's atmosphere, a place where no spacecraft has ever gone. We'll be going 70,000 mph (112,634 km/hr) into a 1,500-mile-wide (2,400-kilometer) gap, operating the spacecraft from a billion miles away."
Cassini has been a relatively trouble free mission, and has made many discoveries about the Saturn system. So why crash the spacecraft?
Cassini is running out of fuel, basically running on fumes at this point.* And NASA needs to follow the protocol of planetary protection, and not allow a spacecraft with possible microbes from Earth to crash into a potentially habitable moon such as Enceladus or Titan.
"Cassini's own discoveries were its demise," Maize said. "Enceladus has a warm, salt water ocean. We can't risk an inadvertent contact with this pristine body. The only choice was to destroy it in a designed fashion."
Maize said that back in 2010, the team decided they would make the mission last as long as possible and use every last kilogram of propellant to explore the Saturn system as thoroughly as they could.
Cassini vs. Saturn. As depicted in this illustration, Cassini will plunge into Saturn's atmosphere on Sept. 15, 2017. Using its attitude control thrusters, the spacecraft will work to keep its antenna pointed at Earth while it sends its final data, including the composition of Saturn's upper atmosphere. Credit: NASA/JPL-Caltech
The final flyby of Titan will ultimately alter Cassini's trajectory and push it toward the spacecraft's final demise. Maize described the gravity slingshot from Titan as a "last kiss goodbye that will push Cassini into Saturn. This is a roller coaster ride that we're not coming out of."
You can plot Cassini's trajectory in JPL's "Eyes on Cassini" special section of their Eyes on the Solar System website.
Project Scientist Linda Spilker said Cassini will be able to make close up measurements of Saturn and its rings to finally help us understand the mass and internal structure of Saturn. And the images should be absolutely stunning.
There's a risk of dust or debris hitting the spacecraft, potentially crippling Cassini. But the risk is worth it, because if the spacecraft survives through all the close passes, the scientific payback will be incredible. However, even if the spacecraft is crippled and can't send back its final science observations, the end is inevitable, as the path toward destruction will be written by the final 'kiss' from Titan.
"This is something we couldn't try at any other time," Maize said. "But now is time."
A computer-generated representation of all Cassini's Saturn orbits -affectionately called the "ball of yarn" by mission planners. The time frame spans Saturn Orbit Insertion on July 1, 2004 to the end of mission on Sept. 15, 2017. Credit: NASA/JPL-Caltech.
The Cassini team said the end of the mission will likely be a combination of excitement, pride and a sense of loss.
"I think that once the signal is lost, it would mean the heartbeat of Cassini is gone," said Spilker. "I think there will be tremendous cheers and applause for the completion of an absolutely incredible mission. Hugs, tears — the Kleenex box will be passed around — but we will rejoice at being part of such a wonderful mission."
See more images and information about the Grand Finale here.
Artist's concept of Cassini orbiter crossing Saturn's ring plane. Credit: NASA/Jet Propulsion Laboratory.
*One of the Cassini team members said that as of today (April 4, 2017) Cassini has 36kg of hydrazine left for the thrusters, which are used everyday to orient the spacecraft, point the antenna towards Earth, point the instruments to their desired targer, etc. For the Titan flyby on April 22, about 10-15 kg. As for the bipropellant that runs the main engines, that's a little more unknown and the one the team is worried most about running out of fuel. The team member said there is about 10 kg of that fuel left, "plus or minus 20 kilos. We could run out today, or we could have 30 kilos left."