Browsed by
Category: Astronomy/cosmology

Scientists stunned by ‘city-killer’ asteroid that just missed Earth

Scientists stunned by ‘city-killer’ asteroid that just missed Earth

Comments 0 Comment

The Washington Post reports: Alan Duffy was confused. On Thursday, the astronomer’s phone was suddenly flooded with calls from reporters wanting to know about a large asteroid that had just whizzed past Earth, and he couldn’t figure out “why everyone was so alarmed.” “I thought everyone was getting worried about something we knew was coming,” Duffy, who is lead scientist at the Royal Institution of Australia, told The Washington Post. Forecasts had already predicted that a couple of asteroids would…

Read More Read More

Moon landing: What Armstrong and Aldrin saw

Moon landing: What Armstrong and Aldrin saw

Comments 0 Comment

Arizona State University: As the Apollo 11 Lunar Module approached the moon’s surface for the first manned landing, commander Neil Armstrong switched off the auto-targeting feature of the LM’s computer and flew the spacecraft manually to a landing. A new video, created at Arizona State University’s School of Earth and Space Exploration, shows what Armstrong saw out his window as the lander descended — and you’ll see for yourself why he took over control.  

The search for extraterrestrial technology finds none

The search for extraterrestrial technology finds none

Comments 0 Comment

The Guardian reports: The close encounter will have to wait. Astronomers have come up empty-handed after scanning the heavens for signs of intelligent life in the most extensive search ever performed. Researchers used ground-based telescopes to eavesdrop on 1,327 stars within 160 light years of Earth. During three years of observations they found no evidence of signals that could plausibly come from an alien civilisation. The only signals picked up by the Green Bank telescope in West Virginia and the…

Read More Read More

Trump: ‘we are going back to the Moon’ but ‘NASA should NOT be talking about going to the Moon.’ Huh?

Trump: ‘we are going back to the Moon’ but ‘NASA should NOT be talking about going to the Moon.’ Huh?

Comments 0 Comment

May 13, 2019: Under my Administration, we are restoring @NASA to greatness and we are going back to the Moon, then Mars. I am updating my budget to include an additional $1.6 billion so that we can return to Space in a BIG WAY! — Donald J. Trump (@realDonaldTrump) May 13, 2019 June 7, 2019: For all of the money we are spending, NASA should NOT be talking about going to the Moon – We did that 50 years ago….

Read More Read More

A bizarre form of water may exist all over the universe

A bizarre form of water may exist all over the universe

Comments 0 Comment

Joshua Sokol writes: Recently at the Laboratory for Laser Energetics in Brighton, New York, one of the world’s most powerful lasers blasted a droplet of water, creating a shock wave that raised the water’s pressure to millions of atmospheres and its temperature to thousands of degrees. X-rays that beamed through the droplet in the same fraction of a second offered humanity’s first glimpse of water under those extreme conditions. The X-rays revealed that the water inside the shock wave didn’t…

Read More Read More

A new glimpse of the evolving universe

A new glimpse of the evolving universe

Comments 0 Comment

  HubbleSite reports: Astronomers have put together the largest and most comprehensive “history book” of galaxies into one single image, using 16 years’ worth of observations from NASA’s Hubble Space Telescope. The deep-sky mosaic, created from nearly 7,500 individual exposures, provides a wide portrait of the distant universe, containing 265,000 galaxies that stretch back through 13.3 billion years of time to just 500 million years after the big bang. The faintest and farthest galaxies are just one ten-billionth the brightness…

Read More Read More

Mystery of the universe’s expansion rate widens with new Hubble data

Mystery of the universe’s expansion rate widens with new Hubble data

Comments 0 Comment

NASA reports: Astronomers using NASA’s Hubble Space Telescope say they have crossed an important threshold in revealing a discrepancy between the two key techniques for measuring the universe’s expansion rate. The recent study strengthens the case that new theories may be needed to explain the forces that have shaped the cosmos. A brief recap: The universe is getting bigger every second. The space between galaxies is stretching, like dough rising in the oven. But how fast is the universe expanding?…

Read More Read More

2014 comet may be first known interstellar visitor to have come close to Earth

2014 comet may be first known interstellar visitor to have come close to Earth

Comments 0 Comment

Science News reports: Earth may already have been visited by an object from outside our solar system — a meteor that burned up in the planet’s atmosphere in 2014, astronomers claim. If confirmed, it would be the first known interstellar object to have entered the atmosphere. The first interstellar visitor known to have come close to Earth was the roughly 400-meter-wide asteroid named ‘Oumuamua.’ It swooped within about 24 million kilometers of the planet in October 2017. Its sharp-angled approach…

Read More Read More

How scientists took the first picture of a black hole

How scientists took the first picture of a black hole

Comments 0 Comment

Science News reports: Black holes are extremely camera shy. Supermassive black holes, ensconced in the centers of galaxies, make themselves visible by spewing bright jets of charged particles or by flinging away or ripping up nearby stars. Up close, these behemoths are surrounded by glowing accretion disks of infalling material. But because a black hole’s extreme gravity prevents light from escaping, the dark hearts of these cosmic heavy hitters remain entirely invisible. Luckily, there’s a way to “see” a black…

Read More Read More

Is methane in Mars’ atmosphere evidence of life?

Is methane in Mars’ atmosphere evidence of life?

Comments 0 Comment

The New York Times reports: Methane gas periodically wafts into the atmosphere of Mars; that notion, once considered implausible and perplexing, is now widely accepted by planetary scientists. Why the methane is there is still a bewildering mystery. It may even point to present-day Martian microbes living in the rocks below the surface. In Nature Geoscience on Monday, scientists working with the European Space Agency’s Mars Express orbiter reported that in the summer of 2013, the spacecraft detected methane within…

Read More Read More

Evidence of the most significant event in the history of life on Earth

Evidence of the most significant event in the history of life on Earth

Comments 0 Comment

Douglas Preston writes: If, on a certain evening about sixty-­six million years ago, you had stood somewhere in North America and looked up at the sky, you would have soon made out what appeared to be a star. If you watched for an hour or two, the star would have seemed to grow in brightness, although it barely moved. That’s because it was not a star but an asteroid, and it was headed directly for Earth at about forty-five thousand…

Read More Read More

Astronomers say it’s time to start taking the search for E.T. seriously

Astronomers say it’s time to start taking the search for E.T. seriously

Comments 0 Comment

Science News reports: Long an underfunded, fringe field of science, the search for extraterrestrial intelligence may be ready to go mainstream. Astronomer Jason Wright is determined to see that happen. At a meeting in Seattle of the American Astronomical Society in January, Wright convened “a little ragtag group in a tiny room” to plot a course for putting the scientific field, known as SETI, on NASA’s agenda. The group is writing a series of papers arguing that scientists should be…

Read More Read More

Large Magellanic Cloud on collision course with Milky Way — in 2.5 billion years

Large Magellanic Cloud on collision course with Milky Way — in 2.5 billion years

Comments 0 Comment

The Guardian reports: As if battered post-Christmas finances, a looming disorderly Brexit and the prospect of a fresh nuclear arms race were not enough to dampen spirits, astronomers have declared that a nearby galaxy will slam into the Milky Way and could knock our solar system far into the cosmic void. The unfortunate discovery was made after scientists ran computer simulations on the movement of the Large Magellanic Cloud (LMC), one of the many satellite galaxies that orbits the Milky…

Read More Read More

The sugar that makes up DNA could be made in space

The sugar that makes up DNA could be made in space

Comments 0 Comment

Science News reports: Parts of DNA can form in space. For the first time, scientists have made 2-deoxyribose, the sugar that makes up the backbone of DNA, under cosmic conditions in the lab by blasting ice with radiation. The result, reported December 18 in Nature Communications, suggests that there are several ways for prebiotic chemistry to take place in space, and supports the idea that the stuff of life could have been delivered to Earth from elsewhere. “It tells us…

Read More Read More