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Maybe music artist Moby was right, and “we are all made of stars.” New research suggests the calcium in our teeth and bones came from star explosions.Researchers from Northwestern University looked at a calcium-rich supernova with x-ray imaging, which provided a glimpse into the last month of the star’s life and ultimate explosion.The findings, published in The Astrophysical Journal, suggest a calcium-rich supernova is a compact star that gives off an outer layer of gas as it’s dying. When it explodes, the star’s matter collides with material, emitting bright x-rays.The explosion is so intensely hot and high pressure, it allows nuclear fusion to produce a massive amount of calcium in mere seconds. Typically, a star creates a small amount of calcium slowly by burning helium.Half the calcium in the universe likely came from calcium-rich supernovae.“These events are so few in number that we have never known what produced calcium-rich supernova,” said Wynn Jacobson-Galan, a first-year Northwestern graduate student who led the study. “By observing what this star did in its final month before it reached its critical, tumultuous end, we peered into a place previously unexplored, opening new avenues of study within transient science.”The observed explosion was named SN 2019ehk in the Messier 100 galaxy. If that sounds a little too fantasy, just know it was 55 million light years from earth.“Without this explosion, you wouldn’t know that anything was ever there,” Margutti added. “Not even Hubble could see it.”The team was able to look at images from the Hubble Telescope of the area of SN 2019ehk before the explosion to compare before and after.The researchers are working on a follow-up study that includes how the supernova is evolving after the explosion, according to statements made to CNN. 1821

Maryland Legal Aid is incensed at the treatment of our colleague, Mr. Rashad James, an extremely talented and dedicated civil legal aid attorney, who under MLA's Community Lawyering Initiative, is tasked with navigating every stretch of this state to provide civil legal counsel and representation for Maryland's poorest and most vulnerable individuals and communities. That includes in Harford County, where this deeply disturbing incident unfolded. 458

MERRITT ISLAND, Fla. – About 250 miles above earth, the International Space Station remains in constant orbit around the planet.“It's an amazing facility,” said retired NASA astronaut Rex Walheim. “It's about the size of a five-bedroom house.”It’s an incredible feat of construction, involving space agencies from multiple countries and astronauts like Walheim, who flew three missions to the International Space Station.“The first portion of the space station program was basically constructing it,” Walheim said. “So, that was what I was most involved with, bringing pieces of the space station, doing spacewalks to bolt new pieces on and to activate them.”In the now 20 years since the space station welcomed the first crew, it’s become a place of valuable research for companies like Techshot.“The people that make the experimental instruments that go in there are people like Techshot,” said Dave Reed of Techshot.We visited Techshot’s facility near the Kennedy Space Center in Cape Canaveral.Their work on the space station includes measuring bone loss, for use in developing treatments for osteoporosis.“Understanding osteoporosis is obviously of great interest to people on earth,” Reed said. “So, drug companies have been a lot of our customers.”Techshot also created a “bio fabrication facility,” which was installed on the space station.Using stem cells, the machine can 3D print human cartilage, a process that works best in a zero-gravity space environment. The idea is to eventually be able to 3D print whole organs that could be used in transplants.“It’s in the future, but it’s not as far away as you might think,” Reed said.Among the other things the space station astronauts have helped develop for use here on earth are advanced water purification systems, where they recycle 93% of the water on the station. Astronauts on board have also collected valuable data, like visual images, to help support first responders to natural disasters in the U.S. and around the world.Those are advances that might not be possible without the space station.“Young people today have never known a time when there hasn't been humans in space,” Walheim said. “That's really amazing.”It’s a whole generation who see humans living and working in space as an everyday part of life. 2288

Mere hours after 11 people were killed by a suspect anti-Semite in the Pittsburgh area on Saturday, a haunted house located less than a three-hour drive away hosted an annual promotion known as "Swastika Saturday."After word of the promotion drew criticism from the public, the Haunted Hoochie located in Pataskala, Ohio was unwavering in its defense of the promotion. "It's a symbol used for love stolen and used for hate ... it’s how nationalism works," the haunted house said on its Facebook page in response to criticism. "Interesting how suicide scenes murder and abortions is all ok but please dont (sic) wear a symbol. It maybe to much," the Haunted Hoochie posted in another comment. According to the Columbus Dispatch, the Haunted Hoochie has run the Swastika Saturday promotion for 28 years. After two days of criticism, the Haunted Hoochie released a statement acknowledging it had made a mistake.  972

MIAMI (AP) — The U.S. National Hurricane Center (NHC) says Tropical Storm Nana has formed south of Jamaica, and is taking aim at Central America.An Air Force Reserve Hurricane Hunter aircraft crew flew into the storm, recording maximum sustained winds of 50 mph with higher gusts.Nana is the earliest 14th named storm on record, beating Nate, which formed on Sept. 6 in 2005, according to Colorado State University professor Phil Klotzbach.The hurricane center says Nana is centered about 120 miles southwest of Kingston, Jamaica, and is moving west at 18 mph on a path that could damage Belize, Honduras, Guatemala and southernmost Mexico.The NHC said Tuesday afternoon that Nana is forecast to be a hurricane near landfall.Here are the Key Messages for Tuesday early afternoon for Tropical Storm #Nana. The biggest change from the previous advisory is that it is now forecast to be a hurricane near landfall. Full forecast https://t.co/tW4KeFW0gB pic.twitter.com/u7IwBt413T— National Hurricane Center (@NHC_Atlantic) September 1, 2020 1045