Big asteroid to fly past Earth
On January 26 asteroid 2004 BL86, about 1/3 of a mile in diameter, will fly past Earth at a distance of about 745,000 miles.
This is the largest known asteroid expected to come this close until 2027.
Tag: science
Cats vs dogs in genome research
After an initial focus on studying the genomes of dogs, genetics researchers are now switching to cats.
After the completion of the human, mouse and rat genomes, the US National Institutes of Health organized a commission to decide on their next target; the dog genome was selected for high-quality sequencing, whereas cats were put on hold.
That got some cat geneticists’ backs up. “The truth is there were more powerful people interested in dogs,” says Stephen O’Brien, director of the Theodosius Dobzhansky Center for Genome Bioinformatics in St Petersburg, Russia, who led the initial cat-sequencing efforts.
There is now a project which, for only $7,500, allows scientists to map the genome of any cat for the cause of science. Under this program, they’ve already done 56 cats, including a kitten and her parents.
Six cool science experiments you can do at home
An evening pause: Hat tip Diane Zimmerman.
The world’s most majestic libraries
Link here.
Opportunity reaches high point on crater rim
The Mars rover Opportunity has climbed to its highest Martian altitude yet, a point on the rim of Endeavour Crater 440 feet above the crater floor below.
This despite the rover’s continuing memory problems.
Travel posters for alien worlds
NASA has produced retro-style travel posters for three alien exoplanets which you can download and print.
The posters are quite cool, which is not surprising, considering that, in the past four decades, the best interplanetary travel that NASA has been able to achieve has been its graphic power-point and pr images. Unfortunately, for NASA actually going there has not been so easy.
Comparing the weather on Mars and Earth
Heh: It is currently warmer in Gale Crater on Mars than in many parts of the United States.
Obviously those SUVs on Mars are causing the warming there. Obviously.
An update on the on-going ebola outbreak in Africa
The Centers for Disease Control today released graphs detailing the on-going ebola epidemic in West Africa.
What is significant about all the graphs at the link is that there is no sign of a let up or an easing of the epidemic. The numbers are still rising, even if the increase has slowed somewhat.
Ancient fossils on Mars?
A close look at features on the Martian surface seen by Curiosity suggests to one scientist the presence of ancient fossils of carpet-like microbiology.
On Earth, carpet-like colonies of microbes trap and rearrange sediments in shallow bodies of water such as lakes and costal areas, forming distinctive features that fossilize over time. These structures, known as microbially-induced sedimentary structures (or MISS), are found in shallow water settings all over the world and in ancient rocks spanning Earth’s history.
Nora Noffke, a geobiologist at Old Dominion University in Virginia, has spent the past 20 years studying these microbial structures. Last year, she reported the discovery of MISS that are 3.48 billion years old in the Western Australia’s Dresser Formation, making them potentially the oldest signs of life on Earth.
In a paper published online last month in the journal Astrobiology (the print version comes out this week), Noffke details the striking morphological similarities between Martian sedimentary structures in the Gillespie Lake outcrop (which is at most 3.7 billion years old) and microbial structures on Earth.
Noffke is very careful in her analysis. She doesn’t claim any proofs, only that her expert eye sees the same things on both planets. Most intriguing.
The sunspot cycle update for December
The monthly update by NOAA of the solar cycle, showing the sunspot activity for the Sun in December, was released this past weekend. As I do every month, I am posting it here, below the fold, with annotations to give it context.
Even though sunspot activity in December increased, the slow ramp down to solar minimum continues to track the 2009 prediction of the solar scientist community. The overall intensity of the solar maximum prior to 2014 was considerable less than this prediction, but the numbers throughout 2014 matched that prediction remarkably well.
» Read more
Comet impact theory replaced by common house fires
The uncertainty of science: Fused droplets found in many places across the globe and theorized to have come from a comet major impact that caused a major climate change around 13,000 years ago have now been found to have instead come from common house fires.
Since the 1970s when the Walter Alvarez found evidence of an asteroid impact in the Yucatan that could have caused the dinosaur extinction 65 million years ago, planetary scientists have seen asteroid or comet impacts everywhere. After all, impacts are cool disasters that play well to television producers and funding agencies.
Read this story however. It describes some very solid scientific work that wipes out one one of those cool theories, replacing it with something quite mundane.
New Hubble images to celebrate its upcoming 25th anniversary
The Space Telescope Science Institute (STScI) that operates the Hubble Space Telescope yesterday released two spectacular new images at the January meeting of the American Astronomical Society.
They also announced new data from Hubble that suggests a major eruption had occurred at the center of the Milky Way about two million years ago.