You may be familiar with the solar cycle that follows a 22 year process shifting from solar minimum to maximum and back again. It’s a cycle that has been observed for centuries yet predicting its peak has been somewhat challenging. The Sun’s current cycle is approaching maximum activity which brings with it higher numbers of …
Chinese and Indian astronomers were the first to measure Earth’s axial tilt accurately, and they did it about 3,000 years ago. Their measurements were remarkably accurate: in 1120 BC, Chinese astronomers pegged the Earth’s axial tilt at 24 degrees. Now we know that all of the planets in the Solar System, with the exception of …
Astronomers have imaged dozens of protoplanetary discs around Milky Way stars, seeing them at all stages of formation. Now, one of these discs has been found for the first time — excitingly — in another galaxy. The discovery was made using the Atacama Large Millimeter/Submillimeter Array (ALMA) in Chile along with the , which detected …
A Protoplanetary Disc Has Been Found… in Another Galaxy! Read More »
Two astronomers use a pioneering method to suggest that the size of our Sun and the solar radius may be due revision. Our host star is full of surprises. Studying our Sun is the most essential facet of modern astronomy: not only does Sol provide us with the only example of a star we can …
The Solar Radius Might Be Slightly Smaller Than We Thought Read More »
“Oh My God,” someone must have said in 1991 when researchers detected the most energetic cosmic ray ever to strike Earth. Those three words were adopted as the name for the phenomenon: the Oh-My-God particle. Where did it come from? Some unknown, extraordinarily powerful event out there in the cosmos sent this single particle all …
I’m sure many readers of Universe Today are like me, fans of the science fiction genre. From the light sabres of Star Wars to the neuralyzer of Men in Black, science fiction has crazy inventions aplenty and once science fiction writers dream it, scientists and engineers try and create it. Perhaps the holy grail of …
Some stars are stuck in bad binary relationships. A massive primary star feeds on its smaller companion, sucking gas from the companion and adding it to its own mass while diminishing its unfortunate partner. These vampire stars are called Be stars, and up until now, astronomers thought they existed in binary relationships. But new research …
Vampire Stars Get Help from a Third Star to Feed Read More »
The spacecraft for the Japanese-led X-ray Imaging and Spectroscopy Mission, or XRISM, undergoes acoustic testing in Japan in December 2022. Credit: JAXA The launch of a Japanese X-ray telescope and robotic lunar lander has been delayed to no earlier than August, and the launch schedule for another Japanese mission to return samples from a moon …
Japanese space science missions facing delays after H3 rocket failure Read More »
The Hubble Space Telescope, seen from the space shuttle Columbia at the end of a 2002 servicing mission. The observatory’s door is open in this picture. Credit: NASA Hardware problems that cropped up earlier this month on the Hubble Space Telescope, now approaching the 31st anniversary of its launch, are the latest signs the observatory …
NASA blames recent Hubble woes on aging hardware Read More »
The Hubble Space Telescope in the payload bay of space shuttle Atlantis during the last servicing mission in May 2009. Credit: NASA NASA has partially restored the Hubble Space Telescope to science mode after a software error temporarily halted observations, but engineers continue studying a problem that kept the telescope’s aperture door from closing and …
Hubble resumes science observations after software error Read More »
