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Transcript of SPACE_JUNK1 - Copy.ppt
SPACE JUNK
Problems, Types, Risks Posed, and Measures against the Problem
PRESENTED BY: CHEMICAL 3rd year
THE PROBLEMS OF SPACE JUNK
NO WAY TO DISPOSE OF JUNK IN SPACE
Space junk is a serious problem with thousands of pieces of space junk orbiting our planet.
There is not an easy way to clean it up.
Most junk came from satellite explosions
Russia and U.S. biggest contributors.
SPACE IS RUNNING OUT IN SPACE Space is more and more crowded
resulting in collisions between spacecraft, satellites and junk.
9000 pieces of space junk in space
Pieces 4 inches or longer combined weigh 5500 tons
WHAT WAS THAT LIGHT IN THE SKY? One night an eye-
catching flashed across the night sky
NORAD tracks pieces of space junk including screwdrivers and astronaut gloves.
FACTS ABOUT SPACE JUNK 50 years ago: no space junk
Now: 25,000 pieces the size of baseball or larger
Most space junk burns on the way to Earth
Junk is potentially harmful if it doesn’t burn before hitting the Earth
Junk could hit spacecraft
SOURCES OF SPACE JUNK
LOST EQUIPMENTS AND BOOSTERS
Astronaut lost a $2700.00 putty knife which is now orbiting in space as space junk
Boosters that remain on orbit causes a serious junk problem, and one of the major known impact events was due to an Ariane booster
NASA Hubble telescope become space junk and needs repairs
DEAD SPACECRAFT
Vanguard1:Vanguard1:
Oldest space junk
Is the size of a cantaloupe
4th manmade object in space
Circled Earth 200,000 times
MYSTERIOUS LIGHT IN SKY WAS RUSSIAN SPACE JUNK
Jan 4, 2007 bright light seen moving quickly across the sky was a piece of Russian rocket that launched a French telescope space junk
RISKS POSED BY SPACE JUNK
SPACE JUNK MAKES AN IMPACT
Space junk poses threat to a space shuttle orbiter
Space experts fear space junk smashing a spacecraft into 100’s of pieces
Space around Earth may be so filled with orbiting junk that space launchings will no longer be possible
SOME MORE IMPACTS CAUSED BY SPACE JUNK Fast moving piece of garbage less than ¼ inch
can pierce spacesuit
Fast moving piece 1/3 inch can disable a satellite
Larger pieces can threaten spacecrafts and people on the ground
THE PROBLEM OF SPACE JUNK
Junk is increasing levels of radiation in the environment surrounding the Earth
Space junk causes problems for satellites and equipment in the Earth’s orbit
China’s test of anti satellite weapon has more than doubled the number of near misses between satellites and debris
If nuclear satellites If nuclear satellites ever collide with ever collide with space debris and space debris and fall apart, it could fall apart, it could contaminate contaminate Earth’s Earth’s atmosphere!!!atmosphere!!!
THE SATELLITES ABOVE US On 12 January 2001, a
Star-48 payload assist module(PAM-D) rocket upper stage re-entered the atmosphere after a "catastrophic orbital decay“
93% of objects in Earth’s orbit are useless space junk including: Abandoned rocket stages, Abandoned rocket stages, Lost lens capsLost lens caps Copper needles from Copper needles from
1960’s radio 1960’s radio communication communication experimentexperiment
HIT OR MISS
0.12 to 0.2 % chance of space shuttle getting hit by space debris
1 in 500 to 1 in 300 chance of losing a space shuttle because of space junk
MEASURES TO BE TAKEN AGAINST SPACE JUNK
SPACE ANGELS
AAutonomous NNanoSatellite GGuardian for EEvaluating LLocal SSpace
This nano satellite willwarn satellites about
nearbyspace junk or hostiletechnology
SATELLITES VS. SPACE JUNK:
Need to know how much fuel a satellite has so it could avoid collisions with space junk
What to do?What to do? EstimateEstimate Sensor to measure gas Sensor to measure gas
pressure levelspressure levels ORORUse satellite fuel tankUse satellite fuel tankcontaining titanium containing titanium allow. It usesallow. It usesultrasound beamultrasound beam to tomore accurately know more accurately know how much fuel is lefthow much fuel is left
WHAT TO DO? Radar and optical detectors should be used for
measurement
Possibly establish international rules and regulation and how country are allowed to operate in spaces
Satellites must be deployed for junk studies
DEALING WITH JUNK Critical areas are protected
by whipple shields
Another possible technology that can aid in reducing space debris is robotic refueling of satellites
SELF REMOVEL:-Rather then using rockets, electrodynamics tether should be attached with spacecrafts
BIBLIOGRAPHYwww.google.com
www.wikipedia.com
www.theatlantic.com
www.howstuffworks.com
BTKIT LIBRARY
THANKS TO ALL