The Scientific Case for Human Spaceflight
Abstracts
DR KEVIN FONG: Life Sciences Research on the International Space Station
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The impact of the space environment upon living organisms is profound. Its
effects range from alterations in sub-cellular processes to changes in the
structure and function of whole organ systems. As the number of astronaut and
cosmonaut crews flown in space has grown, so to has our understanding of the
effects of the space environment upon biological systems.
There are many parallels between the physiology of space flight and terrestrial
disease processes, and the response of astronaut crews themselves to
long-duration space deployment is therefore of central interest.
In the next 15 years the International Space Station (ISS) will serve as a
permanently manned dedicated life and physical sciences platform for the
further investigation of these phenomena. The European Space Agency's Columbus
module will hold the bulk of the ISS life science capability and, in
combination with NASA's Human Research Facility (HRF) will accommodate the rack
mounted experimental apparatus. The programme of experimentation will include
efforts in fundamental biology, human physiology, behavioural science and space
biomedical research.
In the four decades since Yuri Gagarin first orbitted the Earth, space life
science has emerged as afield of study in its own right. The ISS takes us into
the next era of human space exploration, and it is hoped that its programme of
research will yield new insights, novel therapeutic interventions, and
improved biotechnology for terrestrial application.
DR OLIVIER MINSTER: Basic and Applied Research in Physical Sciences in Space
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Through the support of Topical Teams of European scientists for the
preparation of research programme proposals to be submitted in response to
Announcements of Research Opportunities, and the selection of the best
proposals by panels of independent external peers, ESA has set-up a research
plan and a strategy for future activities inh the field of Life and Physical
Sciences Research in the space environment. These activities encompass both
basic and applied research. Significant support of non-space industry to the
research contemplated on the International Space Station has been acquired. A
report on the present situation of the programme will be presented,
particularly for what concerns research in Physical Sciences, as well as an
outline of the development envisaged for the near and medium term future.
DR ARVIND PARMAR: High-Energy Astronomy from the International Space Station
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ESA is currently studying 3 high-energy astronomy missions that use
the International Space Station (ISS). These are Lobster-ISS, an all-sky
imaging X-ray monitor, the Extreme Universe Space Observatory (EUSO)
which will study the highest energy cosmic rays by using the Earth's
atmosphere as a giant detector and XEUS - the X-ray Evolving Universe
Spectroscopy Mission, a potential successor to ESA's XMM-Newton X-ray
observatory. These first 2 missions will be attached to the external
platforms on the Columbus module, while XEUS will visit the ISS to attach
additional X-ray mirrors to enlarge the original 4.5 m diameter mirrors
to the 10 m diameter required to observed redshifted iron lines from
massive black holes in the early Universe.
DR PAUL SPUDIS: The Case for Renewed Human Exploration of the Moon
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A human return to the Moon will be a boon to science. On the Moon, we can
learn about the geological processes that have shaped all of the terrestrial
planets by studying the well-preserved record of the Moon. The Moon is a
superb platform for the observation of the universe and sensitive
instruments designed to take advantage of its unique environment will allow
us to see more of the universe more clearly. Both of these objectives
require the guiding presence of human intelligence, flexibility,
decision-making, and adaptation. Human field work is required to solve many
scientific problems. Experience has shown that human installation and
maintenance of complex equipment in space is often required. No one has yet
built a robot that duplicates or comes close to human judgement and
flexibility. Beyond the sheer adventure of human spaceflight, people are
needed to carry out the complex, second-generation scientific exploration of
the planets.
DR ALEX ELLERY: A Robotics Perspective on Human Spaceflight
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The debate over whether human or robotic space exploration is often seen
as a mutually exclusive one, particularly from the perspective that funds
allocated for manned space missions starve funds for robotic missions. I
shall argue that they are not mutually exclusive - rather, they afford an
efficient division of labour between man and the machine. This division of
labour is driven by limitations on autonomous robotics technology, and
wholesale replacement of men by machines for space exploration will not be
possible for the forseeable future if scientific returns are to be
optimised.
DR JULIAN HISCOX: The Human Exploration of Mars: An Exobiological Perspective
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Early last century, Lowell painted a picture of Mars where an advanced dying
civilisation transported water from the polar caps to cities at the equator.
This view of Mars was shattered in the Sixties when the early Mariner probes
returned images of Mars that resembled the Moon. Mariner 9, the two Viking
orbiters and most recently Mars Global Surveyor overturned this view by
returning images of dried up riverbeds and the remnants of oceans from
an ancient time, which suggested that the climate of ancient Mars and
ancient Earth were very similar. If an origin of life event occured on the
Earth then there is no reason to assume that an event did not occur on
Mars. Traces of an ancient Martian life might still be present today. However,
so far we have only scrapped and scratched at the surface.
If we are to unlock the secrets of the Red Planet then we need to
send human explorers armed with drills and rock hammers. Contrary to perceived
wisdom, the human exploration of Mars is not impossible.
Although fraught with risk, the cost of several such missions is less than the
total cost of the International Space Station.
MR NICK CROSS: The Case for Mars
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Mars is one of the nearest planets to Earth and one that has excited the
imagination of scientists, writers and the general public frequently from
well before the beginning of the space age. Although we don't see Mars as
a planet full of intelligent beings as Percival Lowell did, we see Mars as
a fascinating planet with amazing surface features and a rich geological
history. We have had tantalising clues that life may have once existed
there, and may still exist there.
I will discuss some of the scientific questions that we have about
Mars, and its relation to other bodies in the solar system, before talking
about why human exploration would be beneficial to the scientific work. I
will then discuss why Mars would be a more suitable target than other
planetary bodies and how exploration of Mars will lead to easier
exploration of the rest of the solar system.
DR ANDREW COATES: Limited by cost: the case against humans in the scientific exploration of space
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Human spaceflight represents a heady mix of bravery and drama which can
be inspirational to nations and to humankind but at huge economic cost.
Due to the current high launch costs only a handful of people have
ventured beyond low Earth orbit and walked on the Moon, propelled by
aspirations related more to the Cold War than to science. Problems with
reusable launch vehicle development mean that severe launch cost
limitations will exist for some time.
Meanwhile, cheaper robotic probes have visited all the planets except
Pluto, flown by comets, landed on Mars, Venus and an asteroid, have
probed Jupiter's atmosphere and studied the Universe beyond our own
solar system with telescopes. Using these data we are determining
mankind's place in the Universe. Public interest in the historic Eros
landing eclipsed a simultaneous spacewalk at the fledgling International
Space Station and the Mars Pathfinder landing generated hundreds of
millions of website hits in a few days. Given the fact that hundreds of
Mars missions could be flown for the still-escalating cost of the
International Space Station, the unsuitability of human bodies for deep
space exploration, and the advances in 3-d and virtual reality
techniques, we discuss whether human exploration needs a place in a
realistic, useful and inspirational space programme.
DR IAN CRAWFORD: The Scientific Case for a Human Spaceflight Infrastructure
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I shall argue that science stands to benefit
greatly from the infrastructure developed to support a human space
programme. By infrastructure, I mean all those facilities and capabilities
(e.g. launch vehicles, astronauts, space stations, lunar and planetary bases)
which purely scientific budgets could never afford to develop, but which
nevertheless act to facilitate scientific research which would not
otherwise take place. For example, the human presence on the Moon during
the Apollo Project resulted in the acquisition of scientific data which would
not have been obtained otherwise. There is every reason to expect
that the same will hold true for future human missions to both the Moon and
Mars (and indeed elsewhere), especially if these involve the establishment
of permanently occupied scientific facilities.
In the more distant future, an important scientific application of a
well-developed human spaceflight infrastructure may be the
construction of interstellar space probes (capable of travelling at, say,
ten to twenty percent of the speed of light), for the exploration of the
planets recently discovered around other nearby stars.