The ESA probe BepiColombo flew past Earth on the way to Mercury. The probe launched in 2018 and made the last visit of our home before continuing onward to the final destination. The spacecraft needs to shed velocity to arrive at Mercury in 2025 at a velocity to enter orbit. The spacecraft will make multiple additional planetary flybys of Venus and Mercury to slow down to enter orbit.
In space travel, mission planners need to balance mission resources. The amount of fuel required to either speed up or slow down a spacecraft greatly impacts the cost of the mission. Using a longer flight path can reduce the propellent requirements for a mission but the mission will take longer. Gravity assists can, therefore, allow a spacecraft to be launched on a cheaper, less powerful rocket.
Gravity assist flyby?
A Gravity assist flyby has other names including a gravitational slingshot, gravity assist maneuver, or swing-by. Gravity assistance maneuvers increase or decrease its speed or redirect the orbital path. The spacecraft slingshots around another object with a gravitational field and transfers some of the energy during that slingshot. In the case of BepiColombo, the spacecraft needs to slow down to be captured by Mercury…
Boeing flubbed the first mission of the CST-100. Seemingly a routine mission for SpaceX after completing over 20 deliveries to the International Space Station, Boeing showed how not to do it. During the December 2019 Demo flight for the Boeing Starliner CST-100, the Starliner did not reach its planned orbit. Nor did the Starliner dock to the International Space Station as planned. Boeing was able to complete a number of mission objectives during the flight to comply with the milestones related to NASA’s Commercial Crew.
On the ULA Atlas V rocket at 6:36 a.m. Friday, Dec. 20, the Boeing Starliner launched from Space Launch Complex 41 at Cape Canaveral Air Force Station in Florida. Boeing has a long rich history in both aviation and spaceflight. This mission, already three years behind in schedule, should have been a slam dunk.
After launching to the incorrect orbit, Boeing was able to successfully recover the Starliner. NASA shared that Boeing’s CST-100 Starliner spacecraft did successfully complete the first land touchdown of a human-rated capsule at the White Sands Space Harbor in New Mexico at 7:58 a.m. EST (5:58 a.m. MST) on December 22, 2019. The landing followed a deorbit burn for the botched flight, separation of the spacecraft’s service module, and successful deployment of its three main parachutes and six airbags. Boeing’s approach to the Starliner is unique as the prior US-made capsules, including the SpaceX Dragon, are water recoveries.
Starliner settling softly to the ground on Airbags wasn’t enough.
The NASA and Boeing investigation into the spaceflight was disclosed in Early March 2020. The recommendations included a list of corrections that needed to be addressed prior to the Starliner launching again. The investigation documented 61 “corrective actions” for the company’s Starliner spacecraft. This type of test did do what it was supposed to do. Find issues before people are exposed to potentially dangerous situations. This human risk reduction is a hallmark of the NASA Commercial Crew Program which was put in place to alternatives to the Space Shuttle and Soyuz spacecraft. NASA associate administrator Doug Loverro shared with reporters on a conference call that he expected it months for Boeing to work through the list to be ready for another test flight.
SpaceX is in the process of developing a gigantic Starship that will one day perform voyages to the moon and Mars. The first test prototypes are under construction at the company’s South Texas facility in Boca Chica Beach. On April 2nd, engineers conducted a cryogenic pressure test on, the company’s third Starship prototype this year. The vehicle was loaded with cryogenic (super cold) liquid nitrogen, and pressurized in order to test out how much pressure the stainless-steel structure could withstand. During the test, the craft is pressurized to the max, as engineers inspect for leaks and hope the stainless-steel structure withstands a pressure strength between 6 and ~8.5 bar. This test aims to put the vehicle into conditions similar to those it would experience during a spaceflight. Though, Thursday’s test did not go as planned. The vehicle collapsed, sending shattered steel parts flying off the launch pad’s stand.
Always a good interview. Short answer, he doesn’t think the timeline is accurate.
Dr. Robert Zubrin, former engineer at Lockhead Martin and president and founder of the Mars Society joins us today for a groundbreaking conversation. We discuss the obstacles to sending humans to Mars and the moon, the emergence and role of private enterprise in leading the way to space exploration, as well as the likelihood of success of the US administration’s announcement of its goal to establish a permanent human presence on the moon in 4 years. Dr. Zubrin also recounts the details of his meetings with Elon Musk prior and during the foundation of SpaceX. Other subjects we touched on included the justification for space exploration in the face of mounting problems and priorities here on earth. We also discuss the role of space as a game-changer in the way military domination and conflicts will be done in the future.
Doug Hurley and Bob Behnken, two veteran space shuttle fliers, are gearing up to fly a privately-developed SpaceX Dragon capsule into orbit this year.
The two astronauts participated in several major training events in March, including long-duration simulations to rehearse procedures they will execute during launch on top of a Falcon 9 rocket, their docking with the International Space Station, and then departure from the orbiting lab for return to Earth.
SpaceX and NASA engineers joined the astronauts in the simulations, rehearsing their roles at control centers at the Kennedy Space Center in Florida, SpaceX headquarters in Hawthorne, California, and NASA’s space station control center in Houston.
“Depending on when we launch they’re going to be up there for probably two to three months.”
NASA Administrator Bridenstine
The next launch to the Space Station is planned for April 9th and is only a few days away. Preparations for the launch have been complicated with illness and coronavirus complications. AS OF NOW, the launch is still on track to rocket American astronaut Chris Cassidy and his two Russian cosmonauts Anatoly Ivanishin and Ivan Vagner. Originally, Ivanishin and Vagner were backup for expedition 63. Due to a temporary health condition, Ivanishin and Ivan Vagner were moved forward onto the prime crew. Because of delays in the US Commercial Crew Program, the crew on the ISS may be lower that normal.
Boeing and SpaceX delays put ISS operations at Risk
Since delays to the US Commercial Crew Program might leave Cassidy as the only crew member on the USOS for an extended period of time, Anatoli Ivanishin has been training on US EMU spacesuits. Cassidy has completed multiple EVAs in the past, including an unscheduled EVA. In the unlikely event that an unscheduled EVA is required before additional USOS crew members arrive on the station, then Ivanishin can support Cassidy. Should Ivanishin participate in EVA in the EMU he would be the first Russian cosmonaut to use an EMU since 2007 where Yuri Malenchenko performed the EVA with NASA Astronaut Peggy Whitson. Vagner has been to training on operation the USOS Robotic Arm (Canadarm 2) should there be a need to robotically support any EVA carried out by Cassidy and Ivanishin.
The three astronauts are scheduled to be in space until October 2020 by which time a SpaceX Crew Dragon should be able to rotate a new crew onto the ISS.
During expedition 63, NASA and SpaceX hope to accomplish the first humans launched to the ISS from American soil since the retirement of the space shuttle in 2011. SpaceX’s Crew Dragon Demo-2 mission is a flight test with crew. NASA astronauts Bob Behnken and Doug Hurley will take the Crew Dragon for a “Test drive” on the Demo-2 mission. NASA hopes to certify all of the systems operational for future crewed missions to the International Space Station.
In addition, there is a possibility that the Boeing CST-100 will also launch to the ISS with a crew prior to the return of Cassidy, Ivanishin and Vagner.
If Boeing and SpaceX do not successfully qualify either the CST-100 or Crew Dragon, then the staff on the space station could be reduced to the point where almost no science could be conducted on the USOS portion of the ISS.
According to the November 2019 Office of Inspector General report on NASA’S MANAGEMENT OF CREW TRANSPORTATION TO THE INTERNATIONAL SPACE STATION, NASA will likely experience a reduction in the number of USOS crew aboard the ISS from three to one beginning in spring 2020. This reduction in crew is caused by the schedule delays in the development of Boeing CST-100 and SpaceX Crew Dragon spacecraft. Coupled with with a reduction in the frequency of Soyuz flights there is less crew that can fly to the International Space Station. NASA has successfully ensured access to the ISS by purchasing unused Soyuz seats when four Soyuz vehicles flew per year. Only two Soyuz vehicles are planned for 2020. Astronauts extending their on-Station assignments longer than the standard 6 months will expose astronauts to more significant space-flight-related health concerns.
Crew Dragon Demo-2 a really long test drive.
The SpaceX Crew Dragon Demo-2 flight is still technically considered a test flight and it will be the first time SpaceX flies astronauts to space. To help reduce the risk of crew staffing on the ISS, the duration length of Demo-2 will be long. NASA is looking at extending Demo-2 beyond the original plan of just a few days to the space station and back.
Employees at Jeff Bezos’ aerospace firm Blue Origin are outraged that senior leadership is pressuring workers to conduct a test launch of the company’s New Shepard rocket — designed to take wealthy tourists into space — while the COVID-19 pandemic devastates the United States.
To conduct the flight, Blue Origin officials are considering transporting employees from the company’s main headquarters in Kent, Washington — a town near Seattle where COVID-19 cases have surged — to a small town in West Texas called Van Horn. The town, which has a population of just over 2,000, is home to Blue Origin’s test launch facility where the company has conducted all past flights of the New Shepard rocket.
Many employees fear that traveling to Van Horn might expose them to the novel coronavirus and inadvertently introduce COVID-19 to the residents of the rural town where there is very little infrastructure to handle an outbreak. The Verge spoke exclusively with four Blue Origin employees who all asked to remain anonymous for fear of retaliation from the company. They say they are frustrated by the company’s desire to conduct a launch, as it could unnecessarily jeopardize the health of employees at Blue Origin and residents of Van Horn.