Using the Moon as a mirror
Using the Moon as a mirror.
Using the Moon as a mirror.
Tag: Hubble Space Telescope
Using the Moon as a mirror
Another breathtaking Hubble image of the Egg Nebula.
Another new breathtaking Hubble image of the Egg Nebula.
The image combines data taken in both optical and infrared wavelengths.
Another new breathtaking Hubble image of the Egg Nebula.
The image combines data taken in both optical and infrared wavelengths.
Win an Ipad by delving into the Hubble archive to discover a “hidden treasure.”
Win an Ipad by delving into the Hubble archive to discover a “hidden treasure.”
Win an Ipad by delving into the Hubble archive to discover a “hidden treasure.”
Hubble takes its best image yet of Eta Carina
Preview of a someday supernova: Hubble takes its best image yet of Eta Carinae.
Preview of a someday supernova: Hubble takes its best image yet of Eta Carinae.
The most distant supernova discovered so far.
The most distant supernova discovered so far.
SN Primo is the farthest Type Ia supernova whose distance has been confirmed through spectroscopic observations. The supernova was discovered as part of a three-year Hubble program to survey faraway Type Ia supernovae, enabling searches for this special class of stellar explosion at greater distances than previously possible. The remote supernovae will help astronomers determine whether the exploding stars remain dependable distance markers across vast distances of space in an epoch when the cosmos was only one-third its current age of 13.7 billion years.
The most distant supernova discovered so far.
SN Primo is the farthest Type Ia supernova whose distance has been confirmed through spectroscopic observations. The supernova was discovered as part of a three-year Hubble program to survey faraway Type Ia supernovae, enabling searches for this special class of stellar explosion at greater distances than previously possible. The remote supernovae will help astronomers determine whether the exploding stars remain dependable distance markers across vast distances of space in an epoch when the cosmos was only one-third its current age of 13.7 billion years.
Hubble takes a close up of the double nucleus of the Andromedea galaxy
The Hubble Space Telescope has taken a close up of the double nucleus of the Andromedea galaxy, and found an interesting cluster of hot blue stars in between the two clusters.
Click on the image for the full resolution version of the image.
The Hubble Space Telescope has taken a close up of the double nucleus of the Andromedea galaxy, and found an interesting cluster of hot blue stars in between the two clusters.
Click on the image for the full resolution version of the image.
The Hubble Space Telescope has now been used as a reference in more than 10,000 science papers
And the winner is: The Hubble Space Telescope has now been used as a reference in more than 10,000 peer-reviewed science papers.
And the winner is: The Hubble Space Telescope has now been used as a reference in more than 10,000 peer-reviewed science papers.
The coming blindness of astronomy
The European Southern Observatory today released this infrared image today of what astronomers have named the Fried Egg Nebula. Taken by the Very Large Telescope in Chile, the picture shows the concentric dust shells surrounding a post-red supergiant star, thought to be transitioning to the next stage of stellar evolution called a yellow hypergiant. As the press release explains,
The monster star, known to astronomers as IRAS 17163-3907, has a diameter about a thousand times bigger than our Sun. At a distance of about 13 000 light-years from Earth, it is the closest yellow hypergiant found to date and new observations show it shines some 500 000 times more brightly than the Sun. . . . If the Fried Egg Nebula were placed in the centre of the Solar System the Earth would lie deep within the star itself and the planet Jupiter would be orbiting just above its surface. The much larger surrounding nebula would engulf all the planets and dwarf planets and even some of the comets that orbit far beyond the orbit of Neptune. The outer shell has a radius of 10 000 times the distance from the Earth to the Sun.
Yellow hypergiants are in an extremely active phase of their evolution, undergoing a series of explosive events — this star has ejected four times the mass of the Sun in just a few hundred years. The material flung out during these bursts has formed the extensive double shell of the nebula, which is made of dust rich in silicates and mixed with gas.
According to the science paper [pdf] describing this research, the stage of yellow hypergiants is a preliminary to the star evolving into a luminous blue variable, of which Eta Carinae is the most famous. In this next stage a star is thought to have a good chance of going supernova.
Though this image is truely spectacular, taken by a ground-based telescope of a star 13,000 light years away, what I find most significant about this image is its fuzziness. It reminds me of the kind of images astronomers and the public routinely accepted as the best possible, before the launch of the Hubble Space Telescope.
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NASA science administrator Ed Weiler is retiring after 33 years
Science administrator Ed Weiler is retiring after almost 33 years at NASA.
Among Weiler’s many achievements, he was crucial to getting the Hubble Space Telescope launched. Even more important, though others had conceived the idea of using the shuttle to maintain Hubble, he designed the maintenance schedule for the telescope. Seven years before it was launched, he insisted that a regular schedule of repair missions be placed on the shuttle manifest. He also insisted that a duplicate of the telescope’s main camera be built, so that if anything went wrong with the first a repaired unit could be launched quickly. It was his foresight here that made the first repair of Hubble in December 1993 go so smoothly. For this, astronomers will always be grateful.
Science administrator Ed Weiler is retiring after almost 33 years at NASA.
Among Weiler’s many achievements, he was crucial to getting the Hubble Space Telescope launched. Even more important, though others had conceived the idea of using the shuttle to maintain Hubble, he designed the maintenance schedule for the telescope. Seven years before it was launched, he insisted that a regular schedule of repair missions be placed on the shuttle manifest. He also insisted that a duplicate of the telescope’s main camera be built, so that if anything went wrong with the first a repaired unit could be launched quickly. It was his foresight here that made the first repair of Hubble in December 1993 go so smoothly. For this, astronomers will always be grateful.
Another look at the cost of building NASA’s heavy lift rocket
Clark Lindsey takes another look at the cost for building the Congressionally-mandated heavy lift rocket, what NASA calls the Space Launch System and I call the program-formerly-called-Constellation. Key quote:
Finally, I’ll point out that there was certainly nothing on Wednesday that refuted the findings in the Booz Allen study that NASA’s estimates beyond the 3-5 year time frame are fraught with great uncertainty. Hutchison and Nelson claimed last week that since the near term estimates were reliable, there’s no reason to delay getting the program underway. That’s the sort of good governance that explains why programs often explode “unexpectedly” in cost after 3-5 years…
In other words, this is what government insiders call a “buy-in.” Offer low-ball budget numbers to get the project off the ground, then when the project is partly finished and the much higher real costs become evident, Congress will be forced to pay for it. Not only has this been routine practice in Washington for decades, I can instantly cite two projects that prove it:
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The Hubble Space Telescope: Movie camera!
Using Hubble Space Telescope images taken over a 14 year period, a team of astronomers led by Patrick Hartigan of Rice University have produced six very short time-lapse movies, showing the changes that have occurred to a variety of interstellar jets and bow shocks over time. The one below is my favorite. They are all worth looking at, as they illustrate forcefully how the changeless heavens are not so changeless.
NASA Names Astrophysics Fellowship For Nancy Roman, one of the key people behind the Hubble Space Telescope
NASA has named an astrophysics fellowship in honor of Nancy Roman, who helped design and build the Hubble Space Telescope.
NASA has named an astrophysics fellowship in honor of Nancy Roman, who helped design and build the Hubble Space Telescope.
Hubble captures a necklace in space
Who needs aliens and imagined cities on the moon when you have a reality that produces such strange and beautiful things as the image on the right?
On July 2, the Hubble Space Telescope took this image of a planetary nebula, aptly dubbed the Necklace Nebula. As the caption explains,
A pair of stars orbiting close together produced the nebula, also called PN G054.2-03.4. About 10,000 years ago one of the aging stars ballooned to the point where it engulfed its companion star. The smaller star continued orbiting inside its larger companion, increasing the giant’s rotation rate.
The bloated companion star spun so fast that a large part of its gaseous envelope expanded into space. Due to centrifugal force, most of the gas escaped along the star’s equator, producing a ring. The embedded bright knots are dense gas clumps in the ring.
The binary still exists, and can be seen as the star in the center of the necklace. The two stars are now only a few million miles apart and complete an orbit around each other in about a day.
Hubble has discovered a fourth moon orbiting Pluto
Hubble has discovered a fourth moon orbiting Pluto.
Hubble has discovered a fourth moon orbiting Pluto.
Neptune Completes Its First Circuit Around The Sun Since Its Discovery
Neptune has just completed its first orbit around the sun since its discovery in 1846. And the Hubble Space Telescope has taken some pictures in celebration.
Neptune has just completed its first orbit around the sun since its discovery in 1846. And the Hubble Space Telescope has taken some pictures in celebration.
Hubble Makes its One Millionth Science Observation
A press conference of my very own
This week the Space Telescope Science Institute in Baltimore, Maryland was holding a conference on the future research possibilities of the James Webb Space Telescope, and ended the conference with a writer’s workshop/press conference today.
Not surprisingly, there was not a lot of press interest. The Webb telescope is way behind schedule and over budget, and is not scheduled for launch until 2018. For most of the press, a press conference now on what Webb might someday do is really nothing more than a NASA sales pitch. Most reporters, including myself, don’t find these kinds of press conferences of much worth.
However, after thinking about it a bit, I decided to go, with the hope that I might be able to find out some more details about the state of the telescope’s construction.
To my astonishment, I discovered how little press interest there was, as it turned out I was the only journalist there! When the presentations ended, the whole workshop became an exercise in answering Bob Zimmerman’s questions about Webb and astronomy. I felt a bit embarrassed about this, but then decided the only stupid question is the one you don’t ask, and forged ahead. Moreover, the situation probably was far more embarrassing for the press people at the Institute then it was for me.
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Hubble and Swift show that asteroid debris came from collision
Space telescopes Hubble and Swift have proven that the debris that suddenly surrounded asteroid Scheila last year was caused by a collision.
Space telescopes Hubble and Swift have proven that the debris that suddenly surrounded asteroid Scheila last year was caused by a collision.
Are astronomers finally going to push for a replacement for Hubble?
Astronomers are considering the merger two space missions to create a new optical/ultraviolet space telescope. The mission would be designed to do both deep cosmology and exoplanet observations.
The two communities would both like to see a 4–8-metre telescope in space that would cost in excess of $5 billion. “Our interests are basically aligned,” says [Jim Kasting, a planetary scientist at Pennsylvania State University]. Such a mission would compete for top billing in the next decadal survey of astronomy by the US National Academy of Sciences, due in 2020.
This story is big news, as it indicates two things. First, the 2010 Decadal Survey, released in August 2010, is almost certainly a bust. The budget problems at NASA as well as a general lack of enthusiasm among astronomers and the public for its recommendations mean that the big space missions it proposed will almost certainly not be built.
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