Posted on by Jason Rhian

Historic ISS Spacewalk Unsuccessful, Astronauts To Try Again

Astronauts Wheelock and Caldwell Dyson conducted an eight hour, 3 minute-long spacewalk to replace a balky coolant pump. Credit: NASA

Expedition 24 Flight Engineers Douglas Wheelock and Tracy Caldwell Dyson battled with a balky ammonia pump on a spacewalk that lasted for eight hours and 3 minutes.  Sadly their efforts were in vain.  A line connected to the pump began leaking ammonia forcing mission managers on the ground to reevaluate the situation.  They decided to leave the pump where it is for the time being.  The coolant problem has caused the International Space Station (ISS) to run at a diminished capacity since the pump began acting up.

The spacewalk marked the sixth-longest in human spaceflight history and the longest at the space station without a space shuttle present.  For Wheelock it was his fourth spacewalk, it was Caldwell Dyson’s first.  The pair wrapped up their first attempt at 3:22 p.m. EDT.  Teams monitoring on the ground wanted to review the situation further before the next spacewalk, currently scheduled for Wednesday, Aug. 11, takes place. 

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Meanwhile all of the crew members are perfectly safe and the space station itself is operating at a normal capacity (many science experiments have been shut down to avoid overheating).  Engineers also powered down and adjusted other systems on the station to avoid any complications.  The ammonia pump failed last week and is one of two located on the space station’s S1 Truss element.

There are currently two additional spacewalks planned to address this problem.  The next one is currently scheduled to take place no-earlier than Wednesday, Aug. 11.

Posted on by Nancy Atkinson

Tanks for the Memories

An aerial view of space shuttle tank ET-138 -- the last one -- as it rolls out at Michoud Assembly Facility near New Orleans, Louisiana. Credit: NASA

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Almost the end of an era: the last external tank scheduled to fly on a shuttle mission was rolled out of the Michoud Assembly Facility on Thursday. The tank, ET-138, traveled on a wheeled transporter one mile to the Michoud barge dock, accompanied by a brass band and hundreds of the workers who built tanks over the past 37 years. One additional tank will come from Michoud; ET-122, which was at damaged Hurricane Katrina in August 2005, and is being restored to flight configuration and is scheduled for delivery to Kennedy in late September to serve as the “Launch on Need” tank, for the STS-335 rescue ship, if needed. Or, it might get to fly in space – no decision yet if NASA will get one additional mission.

You can see a gallery of images from Thursday’s New Orleans’ style celebration at this NASA Flickr page.

The tank will make a 900-mile sea journey to Kennedy Space Center, (around the oil slicks in the Gulf of Mexico) and then processing will begin to mate it with shuttle Endeavour and solid rocket boosters for the STS-134 mission, scheduled to launch no earlier than mid-November February 2011. The mission will deliver the Express Logistics Carrier 3 and the Alpha Magnetic Spectrometer to the International Space Station. It will be the 36th shuttle mission to the space station and the 134th and final scheduled shuttle flight.

Posted on by Nancy Atkinson

Red Bull Stratos Update: Breaking the Speed of Sound in Freefall

Baumgartner during a test flight. Credit: Red Bull Stratos

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Here’s an update on the Red Bull Stratos project, where skydiver Felix Baumgartner will attempt to break the speed of sound during freefall. (Read our preview article). Baumgartner and the project’s aeronautic’s experts recently conducted the latest round of high-altitude test jumps and step-off procedure tests. Baumgartner himself reports feeling both satisfaction and apprehension while the team prepares to move into a new phase of testing.

During the last week in May 2010, the Red Bull Stratos team conducted three important tests. In the capsule step-off test, conducted at Sage Cheshire Aerospace in Lancaster, California, the capsule dangled from a 40,000-ton crane to simulate its suspension from the balloon flight train, with Baumgartner practicing his movements inside, exiting and stepping off. The purpose was to determine how the vessel reacts to Baumgartner’s motion, and whether those reactions could compromise his descent. Even a relatively gentle tumble created by imprecise step-off could not only hinder Baumgartner’s ability to break the sound barrier but also suddenly devolve into a dangerously rapid “flat spin” once he encounters a level of increased air density.

Felix Baumgartner during a test flight. Credit: Red Bull Stratos

Next, a group of pre-eminent aerospace experts and test pilots – including Joe Kittinger, who holds the records Baumgartner will try to break – gathered in a deserted Palmdale fairground to witness something they’d never seen during all their combined years of experience: a bungee jump in a pressurized space suit and helmet. After multiple jumps from a crane basket suspended 200 feet above the ground, Baumgartner’s exit technique had evolved into something that one team member described as “perfect.”

The finale to the week of testing was a series of skydives over the desert in Perris, California, reaching approximately 26,000 feet. This test, conducted on May 27, 2010, was the first in a fully pressurized suit and was a follow-up to a similar day of flights in early spring. Baumgartner had been frustrated by the awkwardness of his equipment, especially by the way his chest pack – a vital technology hub for the descent – jammed his helmet and inhibited movement on descent and blocked his vision while landing. Objectives were to get a clean step-off from the rear-exit airplane; assess controllability and various body positions in the fully pressurized suit; experience suit deflation upon descent; and test a new chest pack system that allows one side to move out of Baumgartner’s line of sight so he can spot his landing. Baumgartner’s technique and the improved equipment worked so quite well, so the team was able to accomplish all objectives.

Source: Red Bull Stratos

Posted on by Nancy Atkinson

Climate Change Contributes to Space Junk Problem

An upper stage of a spacecraft exploding. Image Credit: ESA

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The effects of climate change can be seen across the majority of the planet, but a new study reveals it is also affecting the space environment. New Scientist reports that increased carbon dioxide levels are cooling the upper atmosphere, which decreases the atmospheric density. This in turn affects how long defunct satellites, spent rocket boosters and other space debris stay in orbit, contributing to the space junk problem.

Atmospheric drag creates a braking effect on space debris, and eventually causes the various bits and pieces to drop out of orbit and burn up. Two researchers at the University of Southampton in the UK, Arrun Saunders and Hugh Lewis, studied the orbits of 30 satellites over the past 40 years, and recorded a gradual increase in the time they remain in orbit.

They calculated that at an altitude of 300 kilometers, the atmosphere is reducing in density by 5 per cent every decade. “The lower molecular braking means debris can remain in orbit up to 25 per cent longer,” said Lewis.

This raises the risk of collisions with satellites and makes it more hazardous to launch spacecraft. Space agencies and commercial launch companies may need to step up the current space debris mitigation procedures now in place, which include employing on-board passive measures to eliminate the potential for explosions from batteries, fuel tanks, propulsion systems and pyrotechnics, which helps reduce the number of objects in orbit. Or we may need to find a way to remove debris from orbit sooner rather than later.

Saunders and Lewis presented their work at a conference in Boulder, Colorado, last week.

Source: New Scientist

Posted on by Nancy Atkinson

Israel Launches Spy Satellite

The launch of Israel's Ofeq 9 satellite with the Shavit launch vehicle on June 22, 2010. Image courtesy Israeli Aerospace Industries, Ltd.

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Israel launched an “Ofeq 9” satellite on Tuesday, an advanced remote sensing satellite that likely is capable of high resolution surveillance to monitor Iran’s nuclear program. The satellite was launched on Israel’s Shavit launch vehicle.

The Israel Defense Ministry gave no public details on the satellite, only releasing this statement following the launch: “A few minutes ago the State of Israel launched the Ofek-9 (Horizon-9) satellite from the Palmachim base (Israel’s Air Force test range). The results of the launch are being examined by the technical team.”

But in an Israel Defense Ministry document provided to Universe Today, the Ofeq 9 satellite was listed as capable of scanning a swath 7 km wide, with a resolution better than 70 cm and a pointing accuracy to within 20 meters. The satellite will initially be launched to an elliptical transfer orbit – 620 x 307 Km, and following the checkout, the final orbit will be approximately 500 km above Earth.

The Shavit launcher is a 3-stage launcher, 20 meters high and weighs approximately 30 tons.

With the launch of Ofeq-9, Israel has six spy satellites in space.

The satellite was made by Israel Aerospace Industries Ltd. The Shavit launcher has been in use since 1988, when the first Ofeq satellite was put into orbit.

Israel, which has the Middle East’s sole undeclared nuclear arsenal, regards Iran as its principal threat after repeated predictions by the Islamic republic’s hardline President Mahmoud Ahmadinejad of the Jewish state’s demise, according to news reports from Jerusalem. Israel suspects Iran of trying to develop atomic weapons under the guise of its nuclear program, a claim Tehran denies.

Sources: SpaceTravel.com, and special thanks to Avi Blizovsky, Editor Hayadan Science News in Israel.

Posted on by Nancy Atkinson

Separation Camera Takes Full Images and ‘Movie’ of IKAROS Solar Sail

Image of the fully deployed IKAROS solar sail, taken by a separation camera. Credit: JAXA

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Two small “separation cameras” were ejected from JAXA’s (Japan Aerospace Exploration Agency) IKAROS solar sail, which successfully took some amazing full images of the fully deployed sail. The cameras are quite small, cylindrical in shape about 6 cm in diameter and height. They were ejected from the sail using a spring, and then they looked back at IKAROS, and relayed the images wirelessly. The cameras are now floating off into space, having done their job of taking these images. Below, an animation, or movie made by combining several images.


An animation created from several pictures taken by the DCAM2 on IKAROS. The camera rotated as it was ejected from the solar sail, so it is rotating, not IKAROS. Credit: JAXA

From the JAXA press release:

We will measure and observe the power generation status of the thin film solar cells, accelerate the satellite by photon pressure, and verify the orbit control through that acceleration. Through these activities, we will ultimately aim at acquiring navigation technology through the solar sail.

So, now that we know the sail is fully deployed, next comes the big test of whether solar sailing will actually work. This is huge, to finally have the opportunity to test a solar sail in space.

Close-up of the middle of the IKAROS solar sail, taken by the DCAM2. Credit: JAXA

From the IKAROS blog, speaking as the cameras:

Unfortunately I only have the battery, and…working time is very short for about 15 minutes after I do my best work is a planets around the Sun, the world’s smallest man-made flying with IKAROS continue.

Translation: these tiny cameras only had about 15 minutes to do their job of taking pictures before becoming dead little satellites orbiting around the sun.

IKAROS was launched on May 21, 2010 from the Tanegashima Space Center in Japan.

We’ll keep you posted as JAXA begins testing the solar sail.

IKAROS graphic of how the sail deployed. Credit: JAXA
Posted on by Nancy Atkinson

100th Launch to the International Space Station

The Soyuz TMA-19 vehicle blasted off from Baikonur Cosmodrome in Kazakhstan today to bring three new crew members to the International Space Station. This was the 100th launch of missions in support of space station assembly, resupply and crew exchanges. The rocket lit up the early morning sky in Kazakhstan at 3:35 a.m. Wednesday local time, (5:35:19 p.m. EDT and 9:35 pm GMT on Tuesday). The Soyuz took eight and a half minutes to reach orbit, but it will take about 2 days to catch up to the ISS.
Continue reading “100th Launch to the International Space Station”

Posted on by Nancy Atkinson

Unusual Views of the Soyuz Rocket

'Up, up the long delirious burning blue...' View from the Soyuz flame trench by 'Astro_Wheels,' astronaut Douglas Wheelock.

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Two NASA astronauts and a Russian cosmonaut will launch to the International Space Station later today, and astronauts Douglas Wheelock has been able to get up close and personal with the Soyuz rocket that will take them there. He’s taken a few pictures of his rocket from unusual vantage points and posted them on Twitter, and is sharing his prelaunch experiences, too (@Astro_Wheels). Wheelock has big shoes to fill in the Twitter and picture-taking department, as JAXA astronaut Soichi Noguchi set a new standard in making his time on board the ISS a shared experience through images and social media. More pics below, plus a newly released video by NASA of the landing of the Soyuz that brought the Noguchi, Soyuz Commander Oleg Kotov and TJ Creamer back home. It’s a view of the landing not normally seen.

'The work goes on, the cause endures, the hope still lives, and the dream shall never die. T minus 42 hours...' Tweeted Wheelock.

For the next crew heading to the ISS, which will bring the crew size back to six at the space station, veteran cosmonaut Fyodor Yurchikhin, Wheelock and Shannon Walker are scheduled for liftoff aboard the Soyuz TMA-19 spacecraft from the Baikonur Cosmodrome in Kazakhstan at 5:35:19 p.m. EDT (9:35 pm GMT) (3:35:19 a.m. June 16 local time Kazakhstan).

Including manned and unmanned missions, this will be the 100th launch supporting space station operations since assembly began in 1998.

Posted on by Nancy Atkinson

Japanese Solar Sail Deploys Successfully

An image from IKAROS, showing the completion of the second stage deployment of the solar sail. Credit: JAXA

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New images and data from the IKAROS solar sail show the thin solar film has deployed and expanded successfully and is now generating power. Since its launch on May 21, 2010, teams from the Japan Aerospace Exploration Agency (JAXA), have been painstakingly checking out all the systems on IKAROS before deploying the sail, and even the process of unfurling the sail had been a slow process. JAXA began to deploy the sail on June 3, analyzing each step before proceeding. Yesterday, JAXA released a photo of a partially deployed sail (below), but didn’t offer much information as far as the status. But they now have confirmed that the sail was successfully expanded and is generating power. IKAROS is now about 7.7 million km from Earth.

In the image above, the harness is an electrical connection between the membrane and the main body, and the tether is the mechanical connection between the membrane and the main body.

And now comes the big test of the solar sail: will it provide the ability to navigate the spacecraft?

“We will measure and observe the power generation status of the thin film solar cells, accelerate the satellite by photon pressure, and verify the orbit control through that acceleration,” JAXA said in a press release. “Through these activities, we will ultimately aim at acquiring navigation technology through the solar sail.”

The craft will head towards Venus, and the exciting part will be finding out how fast and accurate the solar sail can fly.

Partial deploy of IKAROS, the first stage. Credit: JAXA

From the IKAROS blog (translated from Japanese):

First, the spin rate and learned that he had first IKAROS have successfully deployed from the attitude data. Then, I was part of the downlink data captured with the camera image monitor confirmed that the sail has been deployed from the image. On June 10 has been expanded to clean the sail, “stretched states” get the picture, confirmed the successful deployment of the sail after deployment finished the second check.

Also check the power of solar cells was carried out together, we achieved minimum success!

Power will be realized with the world’s first solar powered sail development.

Graphic showing the sail in full deployment. Credit: JAXA

See the IKAROS webpage for more info and detailed graphics.

Sources: JAXA, IKAROS blog