This week’s 50th edition of the Carnival of Space is hosted by Wayne Hall over at KySat in Kentucky. The Kentucky space science movement seems to be in full swing, culminating in the excellent KySat website. This week, we have stories ranging from rocket racing, monkeys in space (my personal favourite!), Saturn’s moon Titan and my contribution: “LHC Worries are Based on Fear of the Unknown, not Science“.
Superb space science reading from the entire space-science blogosphere, so go and check it out…
It’s been a busy day with a range of topics posted on the Universe Today, but all have a common thread: the universe is a deadly place for man and galaxy. For starters, research into the radiation mankind will face when settling on Mars and the Moon could prove to be one of our main challenges in space. The threat of a massive dose of radiation from a solar flare is bad enough, but the gradual damage to our cells and increased risk of cancer is a problem we need to solve, or at least manage. But that’s nothing compared with what dwarf galaxies have to put up with; their larger spiral cousins like to eat them for dinner, leaving behind galactic ghosts of the dwarfs that were… Continue reading “The Sinister Side of the Cosmos: Killer Galaxies, Cosmic Forensic Science and Deadly Radiation”
We may have some of the best, high resolution robotic cameras looking down on Earth from orbit, but you can’t beat the human eye for choosing the right shot. This spectacular image is a view of Harrat Khaybar, about 140 kilometres to the northeast of the city of Medina, Saudi Arabia. Old volcanic calderas, deserts and ancient lava flows can be seen. This picture was taken by a member of NASA’s Expedition 16 crew on October 10th, 2007, but has only just been released as part of the ISS Crew Earth Observations experiment. We pay so much attention studying the Martian landscape and peering into galactic cores, sometimes it’s nice to turn the lenses around and see the complex geology of Planet Earth. There’s a lot more pictures where this one came from… Continue reading “Astronaut Photographers Take Stunning Pictures of Earth Too”
I’ve heard some crazy talk in my time, but the fear surrounding the Large Hadron Collider (LHC) at CERN has really surprised me. On writing a story last month that a guy in Hawaii (with a scant background in physics) was trying to pass a lawsuit to put a stop to the construction of the LHC, I realised the pressures physicists at the cutting edge of science are under. Physicists the world over have defended the science behind the LHC, and although some of the products from high energy particle collisions are as yet unknown, there is an infinitesimal chance that a black hole will swallow Earth… (I actually want a black hole to be created, the scientific implications will be revolutionary.) Continue reading “LHC Worries are Based on Fear of the Unknown, not Science”
So what is the point of exploring space anyway? We have famine, disease and disaster here down on Earth, why the hell should we direct funds toward manned exploration of the Solar System and beyond? The answer is far from simple, but my personal answer is: to explore the undiscovered… Continue reading “Human Space Exploration: Essential for our Survival”
In a quiet event, with no ceremony or sending off party, the Russian Progress 28 supply module was released from the International Space Station on Monday to fall to Earth as a fireball. On board, all the waste and unwanted equipment from the stations astronauts. The Progress module was launched in January to deliver food, water and other supplies, and with its usefulness at an end, the charred remains of the spaceship now sit at the bottom of the Pacific Ocean… Such a sad story for poor old Progress 28… Continue reading “Daily Roundup: Space Station Dumps its Refuse and Three Black Holes Collide”
Imagine that you have just set up camp on Mars. Everything is up and running. You and your team have not only survived the journey from Earth, you’ve also made it through fiery re-entry and landed within a metre of your planned location. Success! So you crack open a miniature bottle of vintage whisky bottled in the year 2000 and share a sip with your companions. You want to tell the world, you want to check in with your family to say that you are “OK”.
It would be very poor if you were restricted to relaying a message though mission controllers. Simply “phoning home” for a chat wouldn’t be possible (the lag time between sentences would be at least 16 minutes). Could there be a way of sending emails? Possibly; voice messages will be fine too. But could our explorers set up a website or some “Mars blog” to document their travels? This could obviously be done remotely, with a terrestrial website, but there are strong arguments for a distributed Internet service on the Red Planet too. Can a “MarsNet” or “RedNet” be integrated with Earth’s Internet, establishing an “Interplanetary Internet”? Continue reading “Will the First Mars Settlements have Internet Access?”
So how big is it? According to Fraser at the Universe Today, the largest known star is VY Canis Majoris. This is a massive star, otherwise known as a red hypergiant star and this one sits in the constellation Canis Major, about 5000 light years from Earth. Apparently it is more than 2100 times the size of our Sun, a monster! This star is so big that light takes more than eight hours to cross its circumference. In fact, this star, if placed in the centre of the Solar System, it would reach as far as the orbit of Saturn.
Although VY Canis Majoris is big, it isn’t as big as the biggest star could be. If it was cooler, a similar star could reach over 2600 times the size of our Sun…
Gamma ray bursts (GRBs) are the most energetic events to be seen in the observable universe. On March 19th, a record breaking GRB was observed in the constellation of Boötes by NASA’s Swift Observatory and ground based telescope arrays (i.e. the Polish “Pie of the Sky” GRB detector). This was an explosion unparalleled with anything we have ever seen. Not only was it the brightest GRB, it was the most distant GRB – this explosion occurred 7.5 billion years ago (it was therefore located 7.5 billion light years away). Taking measurements of the spectrum of light from these events not only helps us understand what causes such a massive detonation, but also reveals the nature of the Universe when it was half the age it is now.
In a new publication headed by the University of Utrecht, in The Netherlands, the highly dynamic and self-destructive Wolf-Rayet star has been singled out as a possible GRB progenitor after some complex tidal interactions with a binary partner, spinning-up the star until it collapses and unleashes vast amounts of energy into space… Continue reading “Could a Wolf-Rayet Star Generate a Gamma Ray Burst?”