Star Wars Science: University of Arizona space systems engineer designs a rebel-proof Death Star

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University of Arizona Research, Discovery & Innovation

Roberto Furfaro, director of the University of Arizona's Space Systems Engineering Lab, critiques the thermal design of the Death Star as costly and inefficient, suggesting that engineers failed to properly manage excess heat. He proposes alternative cooling solutions, such as advanced radiators, which could significantly reduce vulnerability during attacks. The document also explores the risks associated with external power sources for a spacecraft like the Death Star, concluding that these designs could improve its survivability.

Education

Death Star Design
The Death Star’s thermal design was “costly,”
“inefficient,” and “terrible”
– Roberto Furfaro, director of University of Arizona’s Space Systems
Engineering Lab

What’s the University of
Arizona doing in space?
• Leading NASA’s OSIRIS-REx mission
to an asteroid
• Leading or partnering in running over
20 telescopes around the world
• Partnering with NASA to discover flowing
water on Mars
• According to the more recent NSF report,
the University of Arizona is ranked the
#1 public research university in aerospace

Meet Our Expert
• Roberto Furfaro is an assistant professor
in the UA’s College of Engineering
• Director of the Space Systems
Engineering Lab
• Currently works as a systems engineer
on NASA’s New Frontiers mission:
OSIRIS-REx

Furfaro’s Review
• According to Furfaro, the energy
requirements of a spacecraft the size
of the moon would be huge.
• The original Death Star runs on a
“hypermatter” reactor, a fictional power
source that functions something like
fusion.

Hypermatter power would
provide lots of energy,
but create too much heat,
he explains.

How the engineers of the
Death Star chose to deal
with that excess heat was
lazy design,
according to Furfaro.

Star Wars Science: University of Arizona space systems engineer designs a rebel-proof Death Star

1 2 3 4 5Minimal Minor Moderate Signif cant Severe
5
4
3
2
1
Near Certainty
(~90%)
Highly Likely
(~70%)
Likely
(~50%)
Low Likelihood
(~30%)
Not Likely
(~10%)
Likelihood
Consequences
The small ventilation
holes are a tough target
to hit, putting it in the
“not likely” category in
the risk matrix, but one
highly unlikely shot (with
a little help from the
force) can destroy the
power core and rip the
ship to shreds, landing it
the “severe” category.
Death Star Thermal Exhaust
Risk Report Matrix

Furfaro suggests that the engineers should
have used radiators
that could dissipate or use heat
economically, depending on the
thermal environment. That’s how
temperatures get stabilized
on a spacecraft.

Heat dissipates as the liquid
moves through the radiator
At the surface of the ship
Cool liquid rotating from
radiator

Because the majority of the
ship’s surface area would be
covered with radiator
temperature control, any hit
from a rebel ship would
impact the radiator, giving the
radiator design a “near
certainty” rating on the risk
report matrix. A “Venetian
blind” type of control built into
the radiator system could
reroute cool liquid to keep
the Death Star functional,
meaning damage from an
attack could be minor.
Death Star Radiator Suggestion
Risk Report Matrix

External Power Source Concept,
like the New Horizons Space Probe
This design keeps the core of the spacecraft cool.

A traveling space probe benefits
from an external energy core.
However,
a star-sized battleship is left too open to attacks.
KABOOM

• Could this
have saved
the Death
Star?
• Radiator
• #StarWarsSci
ence
We think
so!
See the full
story

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Star Wars Science: University of Arizona space systems engineer designs a rebel-proof Death Star

1. Death Star Design The Death Star’s thermal design was “costly,” “inefficient,” and “terrible” – Roberto Furfaro, director of University of Arizona’s Space Systems Engineering Lab

2. What’s the University of Arizona doing in space? • Leading NASA’s OSIRIS-REx mission to an asteroid • Leading or partnering in running over 20 telescopes around the world • Partnering with NASA to discover flowing water on Mars • According to the more recent NSF report, the University of Arizona is ranked the #1 public research university in aerospace

3. Meet Our Expert • Roberto Furfaro is an assistant professor in the UA’s College of Engineering • Director of the Space Systems Engineering Lab • Currently works as a systems engineer on NASA’s New Frontiers mission: OSIRIS-REx

4. Furfaro’s Review • According to Furfaro, the energy requirements of a spacecraft the size of the moon would be huge. • The original Death Star runs on a “hypermatter” reactor, a fictional power source that functions something like fusion.

5. Hypermatter power would provide lots of energy, but create too much heat, he explains.

6. How the engineers of the Death Star chose to deal with that excess heat was lazy design, according to Furfaro.

8. 1 2 3 4 5Minimal Minor Moderate Signif cant Severe 5 4 3 2 1 Near Certainty (~90%) Highly Likely (~70%) Likely (~50%) Low Likelihood (~30%) Not Likely (~10%) Likelihood Consequences The small ventilation holes are a tough target to hit, putting it in the “not likely” category in the risk matrix, but one highly unlikely shot (with a little help from the force) can destroy the power core and rip the ship to shreds, landing it the “severe” category. Death Star Thermal Exhaust Risk Report Matrix

9. Furfaro suggests that the engineers should have used radiators that could dissipate or use heat economically, depending on the thermal environment. That’s how temperatures get stabilized on a spacecraft.

10. Heat dissipates as the liquid moves through the radiator At the surface of the ship Cool liquid rotating from radiator

11. Because the majority of the ship’s surface area would be covered with radiator temperature control, any hit from a rebel ship would impact the radiator, giving the radiator design a “near certainty” rating on the risk report matrix. A “Venetian blind” type of control built into the radiator system could reroute cool liquid to keep the Death Star functional, meaning damage from an attack could be minor. Death Star Radiator Suggestion Risk Report Matrix

12. External Power Source Concept, like the New Horizons Space Probe This design keeps the core of the spacecraft cool.

13. A traveling space probe benefits from an external energy core. However, a star-sized battleship is left too open to attacks. KABOOM

14. 1 2 3 4 5Minimal Minor Moderate Signif cant Severe 5 4 3 2 1 Near Certainty (~90%) Highly Likely (~70%) Likely (~50%) Low Likelihood (~30%) Not Likely (~10%) Likelihood Consequences Death Star External Power Source Risk Report Matrix With an external power source, there is severe risk of leaving the Death Star either powerless or destroyed. If the New Horizons space probe were built for war (happily, it wasn’t), the external energy core would almost certainly be exploited.

16. • Could this have saved the Death Star? • Radiator • #StarWarsSci ence We think so! See the full story

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Star Wars Science: University of Arizona space systems engineer designs a rebel-proof Death Star

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Star Wars Science: University of Arizona space systems engineer designs a rebel-proof Death Star