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| Most ancient galaxy with spiral morphology discovered Posted: 20 May 2021 11:53 AM PDT Analyzing data obtained with the Atacama Large Millimeter/submillimeter Array (ALMA), researchers found a galaxy with a spiral morphology by only 1.4 billion years after the Big Bang. This is the most ancient galaxy of its kind ever observed. The discovery of a galaxy with a spiral structure at such an early stage is an important clue to solving the classic questions of astronomy: 'How and when did spiral galaxies form?' |
| Hubble tracks down fast radio bursts to galaxies' spiral arms Posted: 20 May 2021 10:39 AM PDT Astronomers have traced the locations of five brief, powerful radio blasts to the spiral arms of five distant galaxies. |
| Origins of life researchers develop a new ecological biosignature Posted: 20 May 2021 10:37 AM PDT In groundbreaking work, a team has developed a new ecological biosignature that could help scientists detect life in vastly different environments. |
| Not all theories can explain the black hole M87* Posted: 20 May 2021 10:37 AM PDT Theoretical physicists have analyzed data from the black hole M87* as part of the Event Horizon Telescope (EHT) collaboration to test Albert Einstein's theory of general relativity. According to the tests, the size of the shadow from M87* is in excellent agreement being from a black hole in general relativity, but sets constraints on the properties of black holes in other theories. |
| An inconstant Hubble constant? Research suggests fix to cosmological cornerstone Posted: 20 May 2021 10:37 AM PDT More than 90 years ago, astronomer Edwin Hubble observed the first hint of the rate at which the universe expands, called the Hubble constant. |
| Rare 4,000-year comets can cause meteor showers on Earth Posted: 20 May 2021 10:36 AM PDT Researchers report that they can detect showers from the debris in the path of comets that pass close to Earth orbit and return as infrequently as once every 4,000 years. |
| Moon mission delays could increase risks from solar storms Posted: 20 May 2021 06:50 AM PDT Although patterns in the timing of moderate space weather events are known, the most extreme and dangerous events were thought to be random in their timing. This study found for the first time that extreme space weather occurs most frequently at predictable times during solar cycles, meaning space missions could be timed to avoid them. |
| A revolutionary method to drastically reduce stray light on space telescopes Posted: 19 May 2021 01:36 PM PDT Researchers have developed a method for identifying stray light sources on space telescopes, significantly improving their performance. |
| Heavy metal vapors unexpectedly found in comets throughout our Solar System -- and beyond Posted: 19 May 2021 09:08 AM PDT A new study has shown that iron and nickel exist in the atmospheres of comets throughout our Solar System, even those far from the Sun. A separate study reported that nickel vapor is also present in the icy interstellar comet 2I/Borisov. This is the first time heavy metals have been found in the cold atmospheres of distant comets. |
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