Direct images and spectroscopy of a giant protoplanet driving spiral arms in MWC 758

Understanding the driving forces behind spiral arms in protoplanetary disks remains a challenge due to the faintness of young giant planets. MWC 758 hosts such a protoplanetary disk with a two-armed spiral pattern that is suggested to be driven by an external giant planet. We present new thermal infrared observations that are uniquely sensitive to redder (i.e., colder or more attenuated) planets than past observations at shorter wavelengths. We detect a giant protoplanet, MWC 758c, at a projected separation of ~100 au from the star. The spectrum of MWC 758c is distinct from the rest of the disk and consistent with emission from a planetary atmosphere with Teff = 500 +/- 100 K for a low level of extinction (AV<30), or a hotter object with a higher level of extinction. Both scenarios are commensurate with the predicted properties of the companion responsible for driving the spiral arms. MWC 758c provides evidence that spiral arms in protoplanetary disks can be caused by cold giant planets or by those whose optical emission is highly attenuated. MWC 758c stands out both as one of the youngest giant planets known, and also as one of the coldest and/or most attenuated. Furthermore, MWC 758c is among the first planets to be observed within a system hosting a protoplanetary disk.

Industrial Revolution iron method ‘was taken from Jamaica by Briton’

An innovation that propelled Britain to become the world’s leading iron exporter during the Industrial Revolution was appropriated from an 18th-century Jamaican foundry, historical records suggest.

The Cort process, which allowed wrought iron to be mass-produced from scrap iron for the first time, has long been attributed to the British financier turned ironmaster Henry Cort. It helped launch Britain as an economic superpower and transformed the face of the country with “iron palaces”, including Crystal Palace, Kew Gardens’ Temperate House and the arches at St Pancras train station.

Now, an analysis of correspondence, shipping records and contemporary newspaper reports reveals the innovation was first developed by 76 black Jamaican metallurgists at an ironworks near Morant Bay, Jamaica. Many of these metalworkers were enslaved people trafficked from west and central Africa, which had thriving iron-working industries at the time.

Life on Venus? Intriguing molecule phosphine spotted in planet’s clouds again

The Venus phosphine saga continues.

In September 2020, a team of scientists led by Jane Greaves of Cardiff University in Wales reported the detection of phosphine, a possible indicator of life, in the clouds of Venus. The announcement sparked a heated debate and a surge of follow-up studies, which have generally failed to spot the intriguing molecule in the Venusian atmosphere. 

Now there’s a new twist. Speaking at the Royal Astronomical Society’s National Astronomy Meeting 2023 in Cardiff this week, Greaves revealed the discovery of phosphine deeper in the atmosphere of Venus than it had been spotted before. Using the James Clark Maxwell Telescope (JCMT) at the Mauna Kea Observatory in Hawaii, Greaves and her colleagues delved into the atmosphere of Venus, down to the top and even the middle of the planet’s clouds. 

The unions of Hollywood are trying to save it from itself

Fran Drescher, SAG-AFTRA president and the creator of the iconic Fran Fine, stepped up to the microphone, vibrating with fury. She was there with a small group of SAG-AFTRA members to announce their first strike since 1980. “The eyes of the world and particularly the eyes of labor are upon us,” Drescher said. “The gravity of this move is not lost on me, or our negotiating committee, or our board members who have voted unanimously to proceed with a strike.”

This strike is different. It’s far more complicated than just wanting a bigger cut of the hit films and TV shows that actors and writers helped create. A rapid shift toward streaming — coupled with the existential threat posed by AI — has created a canyon between what Hollywood writers and actors want and what the country’s largest media companies are willing to give. As Drescher so bluntly puts it: “You cannot change the business model as much as it has changed and not expect the contract to change too.”