What Keeps NASA Going?

Apollo 17 Commander Gene Cernan on lunar rover

Apollo astronaut Eugene Cernan is the last human to have set foot on a world other than Earth. It’s been 44 years since he last stepped off the moon. In fact, in 1972 he drove around using the lunar rover and found time to scribble his daughter’s initials on the dusty lunar surface. So, other than forays to the International Space Station (ISS) and trips to service the Hubble Space Telescope (HST) NASA has kept humans firmly rooted to the homeland.

Of course, in the intervening decades the space agency has not rested on its laurels. NASA has sent probes and robots all over the Solar System and beyond: Voyager to the gas giants and on to interstellar space,  Dawn to visit asteroids; Rosetta (in concert with the European Space Agency) to visit a comet; SOHO and its countless cousins to keep an eye on our home star; Galileo and Pioneer to Jupiter; countless spacecraft including Curiosity Rover to Mars; Messenger to map Mercury; Magellan to probe the clouds of Venus; Cassini to survey Saturn and its fascinating moons; and of course, New Horizons to Pluto and beyond.

Spiral galaxies together with irregular galaxies make up approximately 60% of the galaxies in the local Universe. However, despite their prevalence, each spiral galaxy is unique — like snowflakes, no two are alike. This is demonstrated by the striking face-on spiral galaxy NGC 6814, whose luminous nucleus and spectacular sweeping arms, rippled with an intricate pattern of dark dust, are captured in this NASA/ESA Hubble Space Telescope image. NGC 6814 has an extremely bright nucleus, a telltale sign that the galaxy is a Seyfert galaxy. These galaxies have very active centres that can emit strong bursts of radiation. The luminous heart of NGC 6814 is a highly variable source of X-ray radiation, causing scientists to suspect that it hosts a supermassive black hole with a mass about 18 million times that of the Sun. As NGC 6814 is a very active galaxy, many regions of ionised gas are studded along  its spiral arms. In these large clouds of gas, a burst of star formation has recently taken place, forging the brilliant blue stars that are visible scattered throughout the galaxy.

Our mechanical human proxies reach out a little farther each day to learn more about our universe and our place in it. Exploration and discovery is part of our human DNA; it’s what we do. NASA is our vehicle. So, it’s good to see what NASA is planning. The agency just funded eight advanced-technology programs that officials believe may help transform space exploration. The grants are part of the NASA Innovative Advanced Concepts (NIAC) program. The most interesting, perhaps, are a program to evaluate inducing hibernation in Mars-bound astronauts, and an assessment of directed energy propulsion for interstellar travel.

Our science and technology becomes more and more like science fiction each day.

Read more about NIAC programs here.

Image 1: Apollo 17 mission commander Eugene A. Cernan makes a short checkout of the Lunar Roving Vehicle during the early part of the first Apollo 17 extravehicular activity at the Taurus-Littrow landing site. Courtesy: NASA.

Image 2: Hubble Spies a Spiral Snowflake, galaxy NGC 6814. Courtesy: NASA/ESA Hubble Space Telescope.

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