When NASA’s rover Perseverance lands on Mars in February, a complicated set of manoeuvres will have to be executed in just minutes, all while the spacecraft hurtles toward the planet at 20,000 km/h.
The event was illustrated in a dramatic new trailer released by the U.S. space agency.
Dubbed the ‘Seven Minutes of Terror,’ NASA likens landing a rover in conditions like this to ‘slamming the brakes.’ Only 40 per cent of missions to Mars by any space agency have been successful.
“Hundreds of things have to go just right during this nail-biting drop,” reads a statement on the mission. And because it takes 11 minutes for the rover to send information back to Earth – at which point the rover’s descent will have already been completed – Perseverance must act autonomously.
Ten minutes prior to landing, the rover sheds everything it doesn’t need. Thrusters activate in order to orient the spacecraft and make sure the all-important heat shields are facing forward.
Mars’ atmosphere will naturally begin to slow the craft, while also heating it up to temperatures around 1,300 C. The interior of Perseverance, however, will feel room temperature.
Once the craft has slowed down to 1,600 km/h, a parachute 21.5 metres in diameter deploys to further decelerate the rover.
After the parachute opens, the heat shield is dropped, allowing the instruments inside the rover to zero in on the planet below. The craft uses a camera on board to navigate its way to the surface.
The parachute can only slow Perseverance down to 320 km/h, after which point it will be cut away. As the rover approaches the surface, rocket engines push against the rover to slow it down to 2.7 km/h.
About 12 seconds before touchdown, the rover drops cables toward the planet’s surface and locks its wheels and legs into place. As soon as the wheels touch the ground, the cables are cut.
Perseverance is headed to Jezero crater to search for evidence of ancient microbial life on Mars.
SpaceX launches 143 satellites on one rocket in record-setting mission – CTV News
A SpaceX Falcon 9 rocket carried 143 satellites into orbit on a jam-packed rideshare mission Sunday, setting a new world record for the most satellites launched by a single rocket.
The mission, dubbed Transporter-1, carried 10 satellites for SpaceX’s Starlink internet network, and more than 130 satellites for a variety of customers including Planet, which operates a constellation of Earth-imaging satellites, and ICEYE, which develops small radar satellites for monitoring ice and tracking floods.
The previous record for the most satellites sent to space in one trip was held by PSLV, an Indian rocket, that carried 104 satellites in a 2017 launch.
SpaceX’s Transporter-1 mission was the first in new rideshare program that SpaceX announced in 2019. The company said at the time it will dedicate “regularly scheduled” launches of its workhorse Falcon 9 rocket to carrying large batches of small satellites, or “smallsats,” rather than focusing on one large, primary payload.
Smallsats have seen a meteoric rise in popularity over the past few years. They range in size from as small as a smartphone to as large as a kitchen refrigerator. And as they’ve grown more advanced, hoards of businesses have entered the market promising to deliver services using new smallsat technologies.
Typically, smallsats reach orbit by tagging along with larger, more expensive satellites, and the waiting list can be long and unpredictable. But there’s been a major push in the launch industry to cater directly to the booming smallsat market. Dozens of new rocket companies are promising to build scaled-down rockets that can provide quick and easy launches for smallsats. Two such companies, Rocket Lab and Virgin Orbit, have successfully sent their downsized rockets to orbit and begun commercial operations.
SpaceX’s Falcon 9 rockets are much larger than Rocket Lab and Virgin Orbit’s rockets, and they’re typically used to launch hefty communications or spy satellites or Dragon spacecraft, which ferry astronauts and cargo to and from the International Space Station.
Deciding to dedicate additional missions just to launching batches of smallsats is a company first, and it’s a sign of how much interest in the industry has grown.
As the number of devices in orbit grows, however, experts are becoming increasingly concerned about congestion. Satellites have collided in orbit before, and though such incidents don’t post much of a threat to people on the ground, the debris from the crash can stay in orbit for years or decades.
First baby tyrannosaur fossils discovered in Alberta, Montana – CBC.ca
Researchers have discovered the first baby tyrannosaur fossils in Alberta and Montana.
Experts say the fossils are a rare discovery, as little is known about young tyrannosaurs and their development, according to a study published in the Canadian Journal of Earth Sciences on Monday.
The study, led by Greg Funston, was based on two fossils: a small toe claw found in Morrin, Alta., and a small, lower jawbone found in Montana.
Tyrannosaurs have been well-researched but fossils from tyrannosaur eggs or embryos have never been found — until now.
“What this does is give us a starting point that we didn’t have,” said Mark Powers, a University of Alberta PhD student and second author on the study.
“We had partway of their growth spurt and we didn’t really have where they originated. To find specimens like this, which is definitively a tyrannosaur in the shell or before it hatched, it says something about that development.”
What do the discoveries mean?
The unprecedented finds offer a lot of information to researchers.
Using a 3D scan of the fossils and measurements of the bones, researchers were able to find out more about the size of the hatchlings and prove that the specimens are of unborn tyrannosaurs.
The 71.5 million-year-old claw found in Alberta has what Powers called “a cartilage cone” on the back of the claw, which means the area hadn’t yet turned to bone and was still developing.
The roughly 75 million-year-old jawbone found in Montana had triangular teeth with shallow roots, confirming they were the first generation teeth of the tyrannosaur.
“This fits with a lot of other discoveries and embryonic studies of birds and other dinosaurs found in the shell so we do suspect that it is an embryonic individual compared to a hatched one,” Powers said.
The location of these fossils is also telling.
The claw was found after a large sentiment was taken from a dig expedition in Alberta several years ago, Powers said.
Generally, smaller dinosaur remains are harder to come by.
Smaller fossils would have been more susceptible to the flowing rivers and flood plains of the cretaceous period, compared to larger dinosaur remains which are often buried deep and preserved in sentiment, Powers said.
The areas where the fossils of the young dinosaurs were found are now possible locations for other important discoveries, according to one professor.
“We don’t have very much of a skeleton by any means, these are relatively scrappy bits. But because we know the area where it seems tyrannosaurs may have been making their nests, we know to go back to that spot and go over with a fine-tooth comb and find more and more stuff,” said Scott Persons, professor of paleontology at the College of Charleston in South Carolina.
“I think undoubtedly that is going to happen so eventually that great prize of actually finding a tyrannosaur egg is going to happen.”
UOttawa startup gets $4M funding boost for technology that curbs 'freezer burn' in stem cell tissue – Ottawa Business Journal
A biotech startup co-founded in Ottawa has landed millions of dollars in new funding for its pioneering solution that helps preserve human cells used in next-generation medical research.
PanTHERA Cryosolutions says it’s secured a $4-million investment from a pair of U.S.-based firms, Washington state-based BioLife Solutions and New York’s Casdin Capital, to help get its system ready for market over the next two years. In exchange, BioLife will receive exclusive worldwide marketing and distribution rights to PanTHERA’s products for use in its cell and gene therapy applications.
Founded four years ago by University of Ottawa chemistry professor Robert Ben and University of Alberta researcher Jason Acker, PanTHERA makes small organic molecules that slow down the buildup of ice – known as recrystallization – that occurs when biological material used in the fields of cell therapy and regenerative medicine is frozen.
Scientists have been freezing cells and tissues for decades to preserve them for research into therapies for a wide range of diseases, explained Ben, who specializes in synthetic organic and medicinal chemistry.
Protective agents such as glycerol are used to prevent the cells from drying out in the freezing and thawing process, he said. But that process “is kind of hit and miss,” Ben noted in a recent post on uOttawa’s website.
Preventing cellular damage
“We might freeze 100,000 cells, but only 25,000 will survive and be viable for research or clinical applications,” he said, likening the process to “freezer burn” that changes the structure – and subsequently the taste – of ice cream that’s been stored for too long.
“That’s because up to 80 per cent of the cellular damage that happens during freezing is due to the uncontrolled growth of ice. Since current cryoprotectant solutions don’t address this problem, our returns, measured in cell recovery and function, are quite dismal.”
PanTHERA’s technology also allows cells to survive at higher temperatures than traditional methods, making it easier to store and ship them to remote locations.
“Small ice crystals are innocuous,” Ben said. “They’re like grains of sand on a Caribbean beach. They’re so small that they mould to your body and you can lay comfortably on the beach for an entire day. Now, let’s say those grains of sand were replaced by gravel or pebbles. That’s a lot less comfortable. Our cryopreservation technology prevents ice crystals from growing too large for comfort.”
For the past 10 months, Ben and his team have been working on a new class of compounds that can protect proteins and viruses. They’re now in the process of proving that the technology can preserve COVID testing materials and RNA-based vaccines.
“Our molecules are unique because, unlike conventional cryoprotectants, they prevent all that cellular damage caused by ice,” Ben said. “In the end, we recover more cells, they’re healthier and more functional. There is nothing else like it out there.”
Milanovich resigns as Edmonton's head coach – CFL.ca
Apple shifts hardware execs as mysterious new project looms – MobileSyrup
B.C.’s COVID-19 vaccine supply temporarily ‘dramatically reduced’ – News 1130
Silver investment demand jumped 12% in 2019
Iran anticipates renewed protests amid social media shutdown
Galaxy M31 July 2020 security update brings Glance, a content-driven lockscreen wallpaper service
Sports23 hours ago
Justin Poirier and Conor McGregor show mutual admiration during backstage meeting following UFC 257
Sports19 hours ago
Player grades: Jesse Puljujarvi has game of his life as Edmonton Oilers beat Winnipeg Jets in a thriller – Edmonton Journal
Politics24 hours ago
Parliament resumes amid heightened political pressure on pandemic, vaccines
Health7 hours ago
Spain’s COVID-19 infections hit new high as regions double down on measures
Investment24 hours ago
Post-pandemic investment idea with a better chance of success
Business7 hours ago
BlackBerry says unaware of reason for stock price surge
Economy7 hours ago
Canada worried by Biden’s ‘Buy American’ plans, will make issue a priority
Politics23 hours ago
Parliament resumes amid heightened political pressure on pandemic, vaccines