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VENUS WAS LAUNCHED BY ESA ON NOVEMBER 9TH, 2005. VENUS, OUR
NEAREST PLANETARY NEIGHBOUR, HAS FASCINATED MANKIND FROM THE EARLIEST
TIMES. NAMED AFTER THE ROMAN GODDESS OF LOVE AND BEAUTY, VENUS WAS
FIRST VISITED BY RUSSIAN AND AMERICAN SPACE PROBES IN THE 1960S.
VENUS WAS FOUND TO BE A STYGIAN (ST-IGY-IAN) WORLD, WITH THE SURFACE
INVISIBLE BEHIND A THICK ATMOSPHERE OF NOXIOUS GASES. THE SURFACE
PRESSURE IS A CRUSHING 90 TIMES GREATER THAN EARTH'S AND THE
TEMPERATURE RUNS OVER 450 DEGREES CELSIUS, HOT ENOUGH TO MELT LEAD.
AS SUNLIGHT HEATS VENUS, THE SURFACE RADIATES INFRARED ENERGY THAT IS
KEPT FROM ESCAPING BY THE DENSE CARBON DIOXIDE ATMOSPHERE; STUDYING
THIS VICIOUS GREENHOUSE EFFECT WILL HELP SCIENTISTS BETTER UNDERSTAND
PLANETARY SYSTEMS IN GENERAL, INCLUDING THE EARTH'S CLIMATE. IN FACT,
VENUS IS VERY SIMILAR TO EARTH IN SIZE, MASS AND DISTANCE FROM THE
SUN, SO CONDITIONS ON THE PLANET MAY ONCE HAVE BEEN SIMILAR TO THOSE
ON EARTH.
DR HAKAN SVEDHEM IS LEAD PROJECT SCIENTIST FOR VENUS EXPRESS AT THE
EUROPEAN SPACE AGENCY'S RESEARCH AND TECHNOLOGY CENTRE IN NOORDWIJK,
THE NETHERLANDS.
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THE ONE-THOUSAND TWO-HUNDRED AND SEVENTY-KILOGRAM VENUS HAS
ONE MAIN ENGINE AND TWO SETS OF FOUR THRUSTERS, AND IS ABOUT AS BIG
AS A MINI SMART CAR. THE SPACECRAFT CARRIES 7 SCIENTIFIC INSTRUMENTS,
INCLUDING A MAGNETOMETER, SPECTROMETERS TO STUDY THE ATMOSPHERE AND
SURFACE, AND THE VMC, OR VENUS MONITORING CAMERA.
LITTLE VENUS EXPRESS IS A TRUE PIONEER AND ESA IS LOOKING FORWARD TO
A NUMBER OF SCIENTIFIC FIRSTS.
AMONG THESE, THE MISSION WILL BE THE FIRST TO EXAMINE THE COMPOSITION
OF THE LOWER ATMOSPHERE AND THE FIRST TO MEASURE, FROM ORBIT, GLOBAL
SURFACE TEMPERATURES. VENUS EXPRESS WILL ALSO PROVIDE THE FIRST
COHERENT STUDY OF ATMOSPHERIC TEMPERATURE AND DYNAMICS AT ALTITUDES
UP TO ABOUT 200 KILOMETRES, AND MAKE THE FIRST SYSTEMATIC
OBSERVATIONS OF VENUS IN WAVELENGTHS RANGING FROM ULTRAVIOLET TO
INFRARED. SCIENTISTS HOPE TO APPLY WHAT THEY LEARN TO THE EVOLUTION
OF OTHER PLANETS, INCLUDING EARTH.
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I ASKED DR SVEDHEM WHAT HE THOUGHT WAS THE MOST EXCITING SCIENCE TO
BE PREFORMED BY VENUS EXPRESS.
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IN ADDITION TO THE POSSIBILITY OF ACTIVE VOLCANISM TODAY, SCIENTISTS
HOPE TO SHED LIGHT ON THE MYSTERIES OF PLANET-WIDE VOLCANIC ACTIVITY
500 MILLION YEARS AGO AND WHAT CAUSES VENUS' HURRICANE-FORCE WINDS
AND RUNAWAY GREENHOUSE EFFECT.
SCIENTISTS ARE PASSIONATE ABOUT RETURNING TO ONE OF THE SOLAR
SYSTEM'S HOTTEST AND MOST HELLISH PLANETS MORE THAN A DECADE AFTER
THE LAST ROBOTIC VISIT, AND VENUS EXPRESS IS PRIMED TO MAKE MANY NEW
DISCOVERIES DURING ITS 500-EARTH-DAY MISSION. BUT FIRST, IT HAS TO
GET THERE.
JOIN US NEXT FOR PART TWO WHEN WE INVESTIGATE HOW VENUS EXPRESS'
REMARKABLE 5-MONTH TRAJECTORY WAS CALCULATED BASED ON FUNDAMENTAL
PHYSICS FIRST DISCOVERED BY NEWTON AND KEPLER.
VENUS WAS LAUNCHED BY ESA ON NOVEMBER 9TH, 2005. VENUS, OUR
NEAREST PLANETARY NEIGHBOUR, HAS FASCINATED MANKIND FROM THE EARLIEST
TIMES. NAMED AFTER THE ROMAN GODDESS OF LOVE AND BEAUTY, VENUS WAS
FIRST VISITED BY RUSSIAN AND AMERICAN SPACE PROBES IN THE 1960S.
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