Ambitious Science Driving Innovative Technology

Originally Published: February 12, 2017

It took nearly 100 years for predictions about frame-dragging, a direct consequence of Einstein’s theory of general relativity published in 1915, to be confirmed using a sophisticated analysis of three spacecraft in orbit about the Earth. The Earth is very, very slowly dragging space with its rotation, subtly changing satellite orbits, as predicted by two Austrian scientist in 1918, and finally confirmed at the <10% level around 2010.

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It also took more than 100 years for the ground-based Laser Interferometer Gravitational-wave Observatory (LIGO) to make the first observations (announced almost exactly 1 year ago!) and to confirm one of the most fundamental predictions of the same theory – the existence of gravitational waves. This prediction has ignited more interest in space-born detections of these waves by spacecraft such as LISA, the Laser Interferometer Space Antenna, which will open up a whole new window into the universe.

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An artist’s rendering of LISA Pathfinder on its way to Earth-sun L1.

It will have taken 60+ years for NASA’s Solar Probe mission to launch in 2018 in order to test the fundamental predictions made by Parker in his profound 1957 paper that almost was rejected by reviewers. It just seemed too unlikely – why would the Sun eject supersonic plasma that fills space? Now, we are finally building the spacecraft¬†to examine the solar wind where it matters most, at its source.

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NASA’s Solar Probe Plus undergoes preparation for testing Engineers at the Johns Hopkins University Applied Physics Laboratory in Laurel, Maryland, prepare the developing Solar Probe Plus spacecraft for thermal vacuum tests that simulate conditions in space.

Sometimes, doing the best science takes a lot of time! It turns out that the most important physical effects we seek to confirm are extra-ordinarily subtle or tough to access.

To do the frame-dragging experiment, we had to learn how to launch spacecraft, how to shoot lasers at them and to measure times and positions at highest accuracy. It took a deep understanding of radiation pressure forces and also of the Earth gravity field and levels we could only imagine in the 1900s.

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The engineering challenges for LIGO almost seem hopeless: detect motions of scales of 1/1000 of an atomic nucleus. Build 4 km long vacuum chambers, and do so twice, 3000 km apart, but in precise coordination. It seems hopeless when you start, but it leads to the best science and it launches a storm of innovation to make it reality.

So, what does it take to get so close to the Sun that you can observe the waves that accelerate the solar wind? You need to be at 10 solar radii, with nearly 50,000 more heat hitting the spacecraft surface than near Earth. To survive this heat, one has to invent a thermal protection system that not only can survive, but do so that the sensitive science measurements next to them are still possible. The spacecraft has to be on auto-pilot for some of the most important phases. It is really, really hard!

Looking at history, it turns out, that we always need to invent some totally new and innovative technologies to enable new ambitious science. This interplay between ambitious science and innovative technologies is one of the most impactful aspects of NASA’s science program. Projects like LISA, the James Webb Space Telescope, or Solar Probe are like science moon shots: We invent all the steps of the path till we finally get the desired goal!

This science-driven technology development not only enables scientific leadership, it also feeds an innovation engine with impacts that are well beyond the realm of the initial question and application space. We know about the economic impact of the Apollo program, and we are in awe about the broad applicability of space technologies for National defense, our technological leadership and also our economy. And in rare cases, our observations we make in space change everything, even the way we think! There is nothing more profound than that.

Broad and lasting impacts are not coming from playing it safe, they come from ambitious science driving innovative technology. Note that we have a NASA science program that has a variety of tools with different objectives. But, when it comes to breakthrough science, playing it safe intellectually does not cut it!

Final point: intellectual ambition is not proportional to the cost of a system. In fact, the most entrepreneurial solutions are the ones that pair intellectual ambition with nearly impossible financial constraints!

Science: An International Language

Originally Published: February 4, 2017

Last week, I did my first trip abroad as Associate Administrator of Science at NASA, visiting both Switzerland and France.

My first talk was to an audience of about 600+ at the University of Bern, my alma mater. I started my presentation by announcing that we were making history today since I was the first NASA Associate Administrator to give a science talk in German (pic below from U Bern). I had prepared for over four hours to ensure that i knew all the words. During this chat, I discussed the impact that science has in the world. From benefiting humanity on Earth, to the importance of fundamental research, the science that NASA does on a daily basis is critical.

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I also gave a lunch talk in Swiss German three days later where I focused on the power of innovation and leadership in organizations. The next day, I finally gave a talk to a French audience. Even though I took some questions in French, I did not dare give my talk in French just having arrived in Paris the day before.

I studied French for 10 years. French is the only subject area in my entire education I did not pass. The only comfort for me as a teenager: Einstein also failed French. In fact, French was my first true foreign language and I despised learning it, not realizing how powerful languages would become in my life. Only a few years later, I lived in a French speaking town and later I shared an apartment with a friend who spoke French.

For many scientists, foreign languages are much more difficult to learn than math or science. But, I have become a strong proponent and actively encourage students to do so. When learning a foreign language two things happen. First, one learns to communicate to more and different people on this Earth. Second, and equally important, learning a new language makes one think of one’s own language. We learn about its origins, its defining characteristics, and also about culture in new and different ways as language and culture are deeply interrelated.

Why is this important? From decades of observations and experiences, I am convinced that the ability to communicate fluently across cultural boundaries is directly linked to the richness of ones personal experiences and also to career success. If we only talk to people who think and talk like us, even when speaking in our native language, we never fully realize the power of what we do to truly make the world better.