Dr. Jeff Hester’s Cool Science

I was a member of the science team responsible for the original Wide Field/Planetary Camera that was launched with the Hubble Space Telescope. Following the discovery of a flaw in the telescope’s primary mirror, I joined the team that built the camera that would save Hubble.

Over my career my scientific interests have been far-ranging, from star formation and the structure of the interstellar medium to pulsars and the death throes of massive stars. I am especially well known for my work on objects such as the Eagle Nebula (I was responsible for Hubble’s Pillars of Creation) and the Crab Nebula.

Here are brief descriptions of a few of the things that I have worked on. I hope you find them interesting.

Star Formation in the Eagle NebulaPosted in Cool Science

Star Formation in the Eagle Nebula

The Hubble Space Telescope image of the Eagle Nebula, dubbed “The Pillars of Creation,” is one of the most famous astronomical images ever taken.


From the original press release: Eerie, dramatic pictures from the Hubble telescope show newborn stars emerging from “eggs” — not the barnyard variety — but rather, dense, compact pockets of interstellar gas called evaporating gaseous globules (EGGs). Hubble found the “EGGs,” appropriately enough, in the Eagle nebula, a nearby star-forming region 7,000 light-years from Earth in the constellation Serpens.

m16_color_fullfield

These striking pictures resolve the EGGs at the tip of finger-like features protruding from monstrous columns of cold gas and dust in the Eagle Nebula (also called M16). The columns — dubbed “elephant trunks” — protrude from the wall of a vast cloud of molecular hydrogen, like stalagmites rising above the floor of a cavern. Inside the gaseous towers, which are light-years long, the interstellar gas is dense enough to collapse under its own weight, forming young stars that continue to grow as they accumulate more and more mass from their surroundings.

The image was taken as part of the telescope time that I was awarded as a member of the science team responsible for the Wide Field and PlaEagleStamp-scallopsnetary Camera 2, or WFPC2. The WFPC2 is the camera that saved Hubble from the disaster of it’s incorrectly polished primary mirror.

Greatest-Images

The image itself is actually a combination of thirty-two different CCD frames that were taken through filters that isolate light coming from certain types of atoms.

The red part of the image shows light from singly ionized sulfur atoms glowing at a wavelength of 0.673 microns. That light traces relatively cool, dense gas. Green shows light emitted at a wavelength of 0.656 microns by hydrogen atoms. Blue light shows emission from doubly ionized oxygen atoms at a wavelength of 0.501 microns. Eagle-color-frames-novaThis traces the hottest, most diffuse gas streaming away from the surfaces of the pillars. The whole thing is being powered by the intense ultraviolet light coming from a cluster of massive, very hot young stars that are many thousands of times more luminous than our own Sun.

The Pillars of Creation image has appeared in countless books, TV shows, and movies.  It was made into a US Postage stamp, and was recently selected by Time Magazine as one of the 100 most influential images in history.

 

But I will always remember the morning that we first saw the images and thought, “Wow!”

Excerpts from the PBS NOVA special, “Origins.”

Excerpts from NatGeo’s “Hubble’s Amazing Universe.”


Repairing the Hubble Space TelescopePosted in Cool Science

Repairing the Hubble Space Telescope

Before launch, the Hubble Space Telescope was being touted as the greatest advance in astronomy since Galileo first pointed a telescope at the heavens. But it didn’t take long to discover that it had a serious flaw. Hubble’s mirror was exquisite. It was just the wrong shape, leaving it unable to make sharp images of the heavens.


Hubble fell victim to a W.A.G. In the face of budget, schedule and political pressures, very smart people turned a blind eye to a wealth of evidence of Hubble’s problems when they could have been easily fixed. The result was a $1.5 billion disaster.

Excerpts from BBC’s “Miracle on Orbit.”

Almost overnight, Hubble became the butt of jokes on late night television. Jay Leno in particular took us to task. “What sound does a space turkey make? ‘Hubble Hubble Hubble'”

I have the dubious distinction of being the guy sitting at the computer console with live nationwide television cameras looking over my shoulder when the first images from Hubble were radioed to Earth. I was also a member of the science team responsible for the Wide Field and Planetary Camera 2, the instrument that would ultimately restore Hubble to its original promise. With the eyes and weight of the world on us, we had the task of making sure that it worked.

The scene in the operations room when the first image from the repaired Hubble was radioed back to Earth.

It is amazing how close that effort came to succumbing to the same sorts of errors responsible for Hubble’s original failure.

Those experiences shaped my thinking throughout the remainder of my career. They form the kernel of my message today. Success doesn’t come from looking for reasons to think that we are right. Success comes from looking for the things that tell us we might be wrong.

Origin of the Solar SystemPosted in Cool Science

Origin of the Solar System

Some of the most interesting ideas come when people from very different backgrounds talk to each other. An example of this involves some work that I undertook along with meteoriticists (scientists who study meteorites) at ASU. Meteorites are fragments left over from the time when the Solar System formed, 4.5 billion years ago.


By carefully analyzing the composition of meteorites it was possible to determine that a particular radioactive isotope of iron was around when the Solar System formed. The only plausible source for the radioactive iron was a massive supernova very near the Sun close to the time that the Sun was born.

Discussing the origins of the Solar System for an episode of National Geographic’s Naked Science.

This tells us that the Sun formed not in a quiescent corner of the galaxy, but in a violent maelstrom shaped by stars hundreds of thousands of times more luminous than the Sun. The implications of this for the formation of our own Earth are profound.

The Crab NebulaPosted in Cool Science

The Crab Nebula

The Crab Nebula is the remnant of a supernova – the explosion of a massive, luminous star – observed by Chinese astrologers in 1054 AD. And to astrophysicists, the Crab is one of the most important objects in the sky.


At the heart of the Crab is the Crab Pulsar. The Crab Pulsar is a rapidly spinning neutron star with a radius of only about 10 km and a mass greater than the mass of our Sun. It has a magnetic field 2 trillion times stronger than Earth’s, and is spinning on its axis 30 times a second.

Movie of the wind from the Crab Pulsar. Orange shows visible light images taken with the Hubble Space Telescope. Blue shows X-ray images taken with the Chandra X-ray Observatory.

In those extreme conditions the Crab Pulsar creates matter and antimatter from our energy and sends it streaming out into space at close to the speed of light. The resulting cloud of relativistic particles emits radiation all the way from the most energetic gamma rays to the longest wavelength radio. I headed a team that used two of NASA’s Great Observatories, the Hubble Space Telescope and the Chandra X-ray Observatory, to observe the Crab over an eight month period and make a movie of its dynamic behavior.

NASA Space Science Update: Televised press conference discussing the Hubble/Chandra movies of the Crab.

My invited review in Annual Reviews summarizes 20 years of research on the Crab Nebula.

My invited review in Annual Reviews summarizes 20 years of research on the Crab Nebula.

The physics going on at the heart of the Crab is similar to the physics going on around the supermassive black holes at the centers of galaxies. But unlike distant quasars, cosmically speaking the Crab is in our own back yard. It is the only place in the sky where we can see these processes at work at close range.

The Crab Nebula was a major focus of my research for over 20 years. For those who would like to know more fascinating things about the Crab, I published an invited review of the Crab Nebula in Annual Reviews of Astronomy and Astrophysics.

Press ReleasesPosted in Cool Science

Press Releases

This page covers a few of my scientific accomplishments. Over the course of my scientific career I was involved in a host of fascinating and important projects.


PR-PhotosHere is the Space Telescope Science Institute archive of Hubble-related press releases in which I played a part.

21st Century AstronomyPosted in Cool Science

21st Century Astronomy

More often that not the chasm that seems to exist between the scientist and the nonscientist is one of language. But it is possible to communicate across such boundaries. It was with that in mind that I took on the task of writing what became a very successful introductory astronomy textbook, 21st Century Astronomy.


From Amazon.com’s review: See the universe through the eyes of a scientist! 21st Century Astronomy’s distinctive writing style, superior art, and supporting media package all work together to teach how science works, help visualize basic concepts and physical processes, and keep us focused on the “big picture.”


Reader testimonials:

“Wonderful explanations. This is the astronomy book I never had as a kid! I’m a biologist and always thought I had the good fortune of working in the most interesting field. It sounds trite, but this book has opened my eyes to a universe out there. Now I even sort of understand black holes and the implications of relativity.”
“This book is really well written, covers all the topics I hoped it would… I’m not a student, just one who has enjoyed learning all my life, and this book has been a great addition to my library. It’s thorough, up to date, has great diagrams and photographs, and goes a bit farther than your usual astronomy text.”

Dr. Jeff Hester’s Cool Science  © Dr. Jeff Hester
Content may not be copied to other sites. All Rights Reserved.

Reality Straight Up!

  • Watching Rome Burn & Hell Freeze  The fun physics of global cataclysmPosted in For Your Consideration
  • Schools in the Time of COVID  The Decision Will Ultimately Make ItselfPosted in Thoughts
  • COVID-19 Arrives  The Humanitarian Disaster is HerePosted in Thoughts
  • Correctly Predicting Failure  It’s time for scientists to get loudPosted in Thoughts
  • Typhoid Mary on Two Wheels  Spreading COVID one lap at a timePosted in Thoughts
  • Pine Boxes  Invest now, the numbers are going upPosted in Success & FailureThoughts
  • Scientists Stuck Inside  Curiosity in the Time of COVIDPosted in For Your ConsiderationThoughts
  • After COVID’s First Wave  No getting back to normalPosted in Success & FailureThoughts
  • COVID-19  Cutting through the confusionPosted in Success & FailureThoughts
  • Great Deceiverism 101  Explanation or Theory? Therein lies the rub.Posted in For Your ConsiderationUnreasonable Faith
  • One Step at a Time  The  not-so-mysterious origin of lifePosted in For Your ConsiderationUnreasonable Faith
  • The Mind’s Siren Call  Being certain is a primrose pathPosted in For Your ConsiderationUnreasonable Faith
  • Watching Rome Burn & Hell Freeze
    The fun physics of global cataclysm

    What do record fire seasons in the West, record hurricane seasons in the Atlantic, record winter storms in the South and the hottest years in history have to do with each other? Everything.

    This article originally appeared in the December 2019 issue of my Astronomy Magazine column, For Your Consideration.

    Read Article

  • Schools in the Time of COVID
    The Decision Will Ultimately Make Itself

    You don’t tug on Superman’s cape. You don’t spit into the wind. Yes, schools are desperately important to kids. No, COVID-19 doesn’t care, and COVID is making the rules right now. Attempts to open schools this fall will fail of their own accord. The relevant question is how to meet the needs of children, families and the community in the face of that reality.

    Read Article

  • COVID-19 Arrives
    The Humanitarian Disaster is Here

    Currently new cases of COVID-19 in Arizona are doubling every 7 days. ICU beds in the state are already full. The rest of the country isn’t that far behind us. You do the math.

    Read Article

  • Correctly Predicting Failure
    It’s time for scientists to get loud

    Now is not the time for scientists to be circumspect and silent. We are on the short end of a battle over whether truth even matters. If scientists do not stand up for what is real, who will?

    Read Article

  • Typhoid Mary on Two Wheels
    Spreading COVID one lap at a time

    The morning cyclist in my neighborhood may not be standing in the Michigan Statehouse carrying a gun and demanding her right to spread contagion far and wide, but she may as well be.

    Read Article

  • Pine Boxes
    Invest now, the numbers are going up

    You know those nice charts and graphs that make it look like we are over the hump of COVID-19 and that things are about to get better? Those predictions are dead wrong, with an unfortunate emphasis on “dead.”

    Read Article

  • Scientists Stuck Inside
    Curiosity in the Time of COVID

    Imagine three gregarious scientists, each with the gift of the gab, all coping with stay-at-home orders. Of course we started a livestream/podcast talk show! What else would we do? Welcome to the kickoff episode of Scientists Stuck Inside.

    Read Article

  • After COVID’s First Wave
    No getting back to normal

    Even after COVID-19 kills hundreds of thousands in the U.S. over the coming weeks, we will still be almost as vulnerable to the pandemic as we are today. We’d all love to “get back to normal” after that, but the price could be a second wave, worse than the first. Some see us facing either economic Depression or allowing vast numbers of preventable deaths, but that is a fool’s choice. There are better options if we have the will to find them.

    Read Article

  • COVID-19
    Cutting through the confusion

    There is a lot of information about COVID-19 out there, much of it misleading. When looking at the future, start with what the science really says.

    Read Article

  • Great Deceiverism 101
    Explanation or Theory? Therein lies the rub.

    If someone can’t tell you how they would know that they are wrong, they don’t have a clue whether they are right.

    This article originally appeared in my Astronomy Magazine column, For Your Consideration.

    Read Article

  • One Step at a Time
    The not-so-mysterious origin of life

    Once seemingly incomprehensible, the origin of life no longer seems such a mystery. Most of what once appeared as roadblocks are turning out to be superhighways.

    This article originally appeared in my Astronomy Magazine column, For Your Consideration.

    Read Article

  • The Mind’s Siren Call
    Being certain is a primrose path

    Being certain lights up our brains like a junkie’s next hit. Literally. Unfortunately, being certain and being right are two very, very different things.

    This article originally appeared in my Astronomy Magazine column, For Your Consideration.

    Read Article

Click on thumbnail to select post:

  • Watching Rome Burn & Hell Freeze  The fun physics of global cataclysmPosted in For Your Consideration
  • Schools in the Time of COVID  The Decision Will Ultimately Make ItselfPosted in Thoughts
  • COVID-19 Arrives  The Humanitarian Disaster is HerePosted in Thoughts
  • Correctly Predicting Failure  It’s time for scientists to get loudPosted in Thoughts
  • Typhoid Mary on Two Wheels  Spreading COVID one lap at a timePosted in Thoughts
  • Pine Boxes  Invest now, the numbers are going upPosted in Success & FailureThoughts
  • Scientists Stuck Inside  Curiosity in the Time of COVIDPosted in For Your ConsiderationThoughts
  • After COVID’s First Wave  No getting back to normalPosted in Success & FailureThoughts
  • COVID-19  Cutting through the confusionPosted in Success & FailureThoughts
  • Great Deceiverism 101  Explanation or Theory? Therein lies the rub.Posted in For Your ConsiderationUnreasonable Faith
  • One Step at a Time  The  not-so-mysterious origin of lifePosted in For Your ConsiderationUnreasonable Faith
  • The Mind’s Siren Call  Being certain is a primrose pathPosted in For Your ConsiderationUnreasonable Faith
  • What do record fire seasons in the West, record hurricane seasons in the Atlantic, record winter storms in the South and the hottest years in history have to do with each other? Everything.

    This article originally appeared in the December 2019 issue of my Astronomy Magazine column, For Your Consideration.

  • You don’t tug on Superman’s cape. You don’t spit into the wind. Yes, schools are desperately important to kids. No, COVID-19 doesn’t care, and COVID is making the rules right now. Attempts to open schools this fall will fail of their own accord. The relevant question is how to meet the needs of children, families and the community in the face of that reality.

  • Currently new cases of COVID-19 in Arizona are doubling every 7 days. ICU beds in the state are already full. The rest of the country isn’t that far behind us. You do the math.

  • Now is not the time for scientists to be circumspect and silent. We are on the short end of a battle over whether truth even matters. If scientists do not stand up for what is real, who will?

  • The morning cyclist in my neighborhood may not be standing in the Michigan Statehouse carrying a gun and demanding her right to spread contagion far and wide, but she may as well be.

  • You know those nice charts and graphs that make it look like we are over the hump of COVID-19 and that things are about to get better? Those predictions are dead wrong, with an unfortunate emphasis on “dead.”

  • Imagine three gregarious scientists, each with the gift of the gab, all coping with stay-at-home orders. Of course we started a livestream/podcast talk show! What else would we do? Welcome to the kickoff episode of Scientists Stuck Inside.

  • Even after COVID-19 kills hundreds of thousands in the U.S. over the coming weeks, we will still be almost as vulnerable to the pandemic as we are today. We’d all love to “get back to normal” after that, but the price could be a second wave, worse than the first. Some see us facing either economic Depression or allowing vast numbers of preventable deaths, but that is a fool’s choice. There are better options if we have the will to find them.

  • There is a lot of information about COVID-19 out there, much of it misleading. When looking at the future, start with what the science really says.

  • If someone can’t tell you how they would know that they are wrong, they don’t have a clue whether they are right.

    This article originally appeared in my Astronomy Magazine column, For Your Consideration.

  • Once seemingly incomprehensible, the origin of life no longer seems such a mystery. Most of what once appeared as roadblocks are turning out to be superhighways.

    This article originally appeared in my Astronomy Magazine column, For Your Consideration.

  • Being certain lights up our brains like a junkie’s next hit. Literally. Unfortunately, being certain and being right are two very, very different things.

    This article originally appeared in my Astronomy Magazine column, For Your Consideration.

Over his 30 year career as an internationally known astrophysicist, Dr. Jeff Hester was a key member of the team that repaired the Hubble Space Telescope. With one foot always on the frontiers of knowledge, he has been mentor, coach, team leader, award-winning teacher, administrator and speaker, to name a few of the hats he has worn. His Hubble image, the Pillars of Creation, was chosen by Time Magazine as among the 100 most influential photographs in history.
©Dr. Jeff Hester LLC, 5301 S. Superstition Mountain Dr., Suite 104 #171, Gold Canyon, AZ 85118