Threats From Above Lead the List of Space Concerns in New Survey

Vapor trail from 2013 Chelyabinsk meteor
This vapor trail was left behind by an asteroid that zoomed over the Siberian city of Chelyabinsk in 2013. (Credit: Alex Alishevskikh via NASA)

Sending astronauts to the moon is OK — but more Americans think NASA should instead put a high priority on monitoring outer space for asteroids and other objects that could pose a threat to Earth, according to the Pew Research Center’s latest survey focusing on Americans’ perspectives on space policy.

The nonprofit research center’s report was released today, on the 54th anniversary of the Apollo 11 moon landing. It follows up on a similar survey that was done in 2018 to mark NASA’s 60th anniversary.

The earlier survey suggested that slightly more Americans saw monitoring climate change as a top priority (63% vs 62%). This year, the rankings were reversed, with 60% putting cosmic threats at the top of their list, as opposed to 50% for climate concerns. Only 12% of the respondents said sending astronauts to explore the moon was a top priority, and 11% said sending astronauts to Mars led their list. That translates into less support than those missions had five years ago.

The survey, conducted online from May 30 to June 4, is based on responses from 10,329 randomly selected U.S. adults who are part of the research center’s online panel. The results were weighted to reflect current demographics.

Continue reading “Threats From Above Lead the List of Space Concerns in New Survey”

Hubble Finds a Bunch of Galaxies That Webb Should Check out

Galaxies from the last 10 billion years witnessed in the 3D-DASH program, created using 3D-DASH/F160W and ACS-COSMOS/F814W imaging. Image Credit: Lamiya Mowla

The Universe is full of massive galaxies like ours, but astronomers don’t fully understand how they grew and evolved. They know that the first galaxies formed at least as early as 670 million years after the Big Bang. They know that mergers play a role in the growth of galaxies. Astronomers also know that supermassive black holes are involved in the growth of galaxies, but they don’t know precisely how.

A new Hubble survey of galaxies should help astronomers figure some of this out.

Continue reading “Hubble Finds a Bunch of Galaxies That Webb Should Check out”

Can You Spot a Planetary Nebula from a Few Blurry Pixels? Astronomers Can – Here’s How

A planetary nebula is one of the most beautiful objects in the universe. Formed from the decaying remnants of a mid-sized star like a sun, no two are alike. Cosmically ephemeral, they last for only about 10,000 years – a blink of a cosmic eye. And yet they are vitally important, as their processed elements spread and intermingle with the interstellar medium in preparation for forming a new generation of stars. So studying them is important for understanding stellar evolution. But unlike their stellar brethren, since no two are alike, it’s hard to efficiently pick them out of astronomical deep-sky surveys. Thankfully, a research team has recently developed a method for doing just that, and their work could open up the door to fully understanding the great circle of stellar life.

Continue reading “Can You Spot a Planetary Nebula from a Few Blurry Pixels? Astronomers Can – Here’s How”

Our Universe is Dying

How a galaxy appears in different wavelengths of light. Based on the results of a recent study light from the nearby Universe is fading across all of these wavelengths. Credit: ICRAR/GAMA and ESO

Brace yourselves: winter is coming. And by winter I mean the slow heat-death of the Universe, and by brace yourselves I mean don’t get terribly concerned because the process will take a very, very, very long time. (But still, it’s coming.)

Part of ESO’s VISTA telescope in Chile, one of seven telescopes used in the GAMA survey (ESO)

Based on findings from the Galaxy and Mass Assembly (GAMA) project, which used seven of the world’s most powerful telescopes to observe the sky in a wide array of electromagnetic wavelengths, the energy output of the nearby Universe (currently estimated to be ~13.82 billion years old) is currently half of what it was “only” 2 billion years ago — and it’s still decreasing.

“The Universe has basically plonked itself down on the sofa, pulled up a blanket and is about to nod off for an eternal doze,” said Professor Simon Driver from the International Centre for Radio Astronomy Research (ICRAR) in Western Australia, head of the nearly 100-member international research team.

As part of the GAMA survey 200,000 galaxies were observed in 21 different wavelengths, from ultraviolet to far-infrared, from both the ground and in space. It’s the largest multi-wavelength galaxy survey ever made.

Of course this is something scientists have known about for decades but what the survey shows is that the reduction in output is occurring across a wide range of wavelengths. The cooling is, on the whole, epidemic.

Watch a video below showing a fly-through 3D simulation of the GAMA survey:

“Just as we become less active in our old age, the same is happening with the Universe, and it’s well past its prime,” says Dr. Luke Davies, a member of the ICRAR research team, in the video.

But, unlike living carbon-based bags of mostly water like us, the Universe won’t ever actually die. And for a long time still galaxies will evolve, stars and planets will form, and life – wherever it may be found – will go on. But around it all the trend will be an inevitable dissipation of energy.

“It will just grow old forever, slowly converting less and less mass into energy as billions of years pass by,” Davies says, “until eventually it will become a cold, dark, and desolate place where all of the lights go out.”

Our own Solar System will be a quite different place by then, the Sun having cast off its outer layers – roasting Earth and the inner planets in the process – and spending its permanent retirement cooling off as a white dwarf. What will remain of Earthly organisms by then, including us? Will we have spread throughout the galaxy, bringing our planet’s evolutionary heritage with us to thrive elsewhere? Or will our cradle also be our grave? That’s entirely up to us. But one thing is certain: the Universe isn’t waiting around for us to decide what to do.

The findings were presented by Professor Driver on Aug. 10, 2015, at the IAU XXIX General Assembly in Honolulu, and have been submitted for publication in the Monthly Notices of the Royal Astronomical Society.

Read more/sources: ESO and ICRAR

How Much Of The U.S. Public Supports Space Spending? Depends On How You Read The Stats

Apollo 16 astronaut John Young on the moon in 1972. Credit: NASA

A few days ago, the Pew Research Center published an article about space exploration support starting with this sentence: “Many Americans are optimistic about the future of space travel, but they don’t necessarily want to pay for it.”

The article’s impetus was this recent Pew Research/Smithsonian study called “U.S. Views of Technology and the Future” that said a third of Americans think there will be manned colonies on other planets by 2064. But long-range statistics from the National Opinion Research Center’s General Social Survey, Pew argues, demonstrate weak support for paying for space exploration.

“We found that Americans are consistently more likely to say that the U.S. spends too much on space exploration than too little. At no time has more than 20% of the public said that the U.S. spends too little on space exploration,” Pew wrote in the article of the survey, which has been running for about 40 years.

Not everyone agrees with that interpretation of those numbers. In a personal website blog post published in 2013 (after the last GSS came out) NASA employee Dennis Boccippio said that financial support for space exploration has never been higher.

The International Space Station. Credit: NASA
The International Space Station. Credit: NASA

The blog post, which referred to preliminary data from the 2012 survey, showed “an overall higher favorability rating” that was stronger than any GSS survey or at points cited before then from the National Air and Space Museum’s Roger Launius. In particular, look at this graph that Boccippio published on his blog.

“The GSS surveys consistently show a slightly lower favorability rating for the survey question variant ‘space exploration program’ versus ‘space exploration’ – but it’s very small. This may be one way to measure the difference between supporting the concept of exploration and supporting government programs,” Boccippio said in an e-mail to Universe Today. Boccippio is NASA’s manager of the center of strategic development at the Marshall Space Flight Center, but said he wrote the blog post as a private citizen.

“The Pew research article seems fairly written, you’ve seen the graphic on my blog, so it’s a matter of interpretation. The fact that a large (30-40%) number of respondents respond ‘we’re spending too much’, and that the strong advocate/proponent population is small (10-20%) isn’t really news, this has been consistent for decades, and one could as easily state from the same data ‘more than 50% of Americans have consistently said we’re spending the right amount on it.”

SpaceX's Dragon spacecraft berthed to the International Space Station during Expedition 33 in October 2012. Credit: NASA
SpaceX’s Dragon spacecraft berthed to the International Space Station during Expedition 33 in October 2012. Credit: NASA

Boccippio added that what really interested him was two trends in the data: how supporters have gone up in the last two GSS surveys, and declines in people saying there was too much spending in the space program since 1992 (an era where the Hubble Space Telescope’s deformed mirror was high in public consciousness, along with Congressional debates about whether to build the International Space Station, he said.)

After an inquiry from Universe Today, Pew said part of the different interpretations could depend on “data analysis and weighting variations”, and added they made adjustments in the blog post to reflect those interpretations.

“We relied on the Roper Center calculations of the GSS data, the blogger you cite used preliminary data … At the same time, the general point we made still holds. At no time in GSS surveying has the support for more spending topped the figure of those saying there should be reductions in spending,” said Lee Rainie, the director of Pew’s Research Center’s Internet & American Life Project, in an e-mail.

Artist's conception of NASA's asteroid retrieval mission. Credit: NASA
Artist’s conception of NASA’s asteroid retrieval mission. Credit: NASA

“You make an interesting observation about the recent upward tick in the number of people who say we are spending too little on space exploration,” he added. “It was also interesting to us that over time these numbers reflect relatively less support for space exploration than for several other possible government priorities.” (Those other priorities, the blog post says, are education, health and alternative energy sources.)

Rainie also clarified that the space colonization survey did not necessarily ask respondents who would pay for it. “Our poll with the Smithsonian Magazine did not mention NASA in our question regarding long-term colonies on other planets, nor did our question suggest in any way who might perform planetary colonization,” he said.

“It’s likely the case that respondents may have had several ideas in mind when they answered the question: NASA, a private entity, an international group, or some combination of them. Our point in mentioning this was that Americans seem expectant and hopeful about further space exploration.”

What do you make of the numbers? Again, you can view the two posts here and here.