Behold the first geological map of Ganymede, Jupiter’s largest moon
by Lauren Davis
Four hundred years ago, Galileo Galilei observed Ganymede in orbit around Jupiter. This week, a team of planetary scientists unveiled the first global geological map of our solar system’s largest moon.
Using images obtained by NASA’s Voyager 1 and 2 spacecraft and the Galileo orbiter, a team led by Geoffrey Collins of Wheaton College pieced together a mosaic image of the planet, giving us our first complete image of the geological features of the satellite. Above, you can see the moon centered at 200 west longitude. The darker areas represent the very old and heavily cratered region of Ganymede, while the lighter areas are somewhat younger regions marked with grooves and ridges…
To be thankful for the Starbucks lady, Lucy,
who is pissed at me for asking too many questions
about my damn phone app
is one thing.
To be thankful for my wife plastering my face to the bathroom floor
with pancake batter
for missing the bus
is another thing.
I tried to be thankful for my eyes this morning
even though one of them is filled with puss
and the other with marigold juice.
Marigold juice is the stuff that comes from the flower
when you put it between your palms and rub, slowly in prayer,
even though nothing comes out.
It’s the imagined juice of God,
the thing you can’t see when you are not being thankful.
I try to be thankful for the lack of energy that is my laziness
and my lonely best friend with no wife and children
knowing I am as lonely as he
with one wife and two daughters.
Sometimes we travel five minutes to the pier in Red Hook
and it takes hours in our loneliness to know, in our thankfulness,
that if we held hands it’d be a quiet romance for the ages.
I’ll admit, I’m thankful for Justin Timberlake
because he’s better than Beethoven
and my friend Aaron
who lived in the woods with an axe and never used it once.
I try hard to forget love,
to abandon love,
so that one day I will actually be able to love.
Until then, I am thankful that Lucy wanted to spit in my coffee,
or imagined that she did,
and thanked her profusely
for showing me which buttons to push
and how to do it, with just the right amount of pressure,
the whole tips of all my fingers dancing like stars
through the blackness
of a mocha latte, black.
Like animals moving daily
through the same open field,
it should be easier to distinguish
light from dark, fabrications
from memory, rain on a sliver
of grass from dew appearing
overnight. In these moments
of desperation, a sentence
serves as a halo, the moon
hidden so the stars eclipse
our daily becoming. You think
it should be easier to define
one’s path, but with the clouds
gathering around our feet,
there’s no sense in retracing
where we’ve been or where
your tired body will carry you.
Eventually the birds become
confused and inevitable. Even our
infinite knowledge of the forecast
might make us more vulnerable
than we would be in drawn-out
ignorance. To the sun
all weeds eventually rise up.
Astrophile: Wrinkles reveal Mercury’s rapid slimming
Object: Mercury’s many wrinkles
Source: A cooling, crumpling crust
Mercury just wanted to look its best. As the years rolled by the planet was losing the fire of its youth, but it was also slimming down, shedding a few pesky kilometres from its round, rocky body. Then the wrinkles started to sprout…
When the solar system formed about 4.6 billion years ago, Mercury was a hot ball of molten material. The tiny planet cooled quickly, shrinking in size and causing its relatively thin crust to crumple up. The shrinking seems to have slowed down after about a billion years, but the grey, pockmarked world we see today is crisscrossed by steep crustal ridges that reveal the period of rapid contraction.
Thy soul shall find itself alone ‘Mid dark thoughts of the grey tomb-stone; Not one, of all the crowd, to pry Into thine hour of secrecy. Be silent in that solitude, Which is not loneliness—for then The spirits of the dead, who stood In life before thee, are again In death around thee, and their will Shall overshadow thee; be still. The night, though clear, shall frown, And the stars shall not look down From their high thrones in the Heaven With light like hope to mortals given, But their red orbs, without beam, To thy weariness shall seem As a burning and a fever Which would cling to thee for ever. Now are thoughts thou shalt not banish, Now are visions ne’er to vanish; From thy spirit shall they pass No more, like dew-drop from the grass. The breeze, the breath of God, is still, And the mist upon the hill Shadowy, shadowy, yet unbroken, Is a symbol and a token. How it hangs upon the trees, A mystery of mysteries!
Large sea turtles and some whales
will outlive us, water a manifestation of wind in
I had to use the shovel to hack at the wood, had to grab
a hatchet, down deep in the hole. The oak pitched around
like a ship’s mast, or I was no longer alive; perhaps I was yet
all over again, though I kept recalling your name. The verdurous roots.
By Video Animation:Endovascular Treatment for Cerebral Aneurysms
In a paper published in the prestigious journal Science Translational Medicine, Professor Colin Masters from the Florey Institute of Neuroscience and Mental Health and University of Melbourne – and colleagues in the UK and US – have found rapid neuronal damage begins 10 to 20 years before symptoms appear.
“As part of this research we have observed other changes in the brain that occur when symptoms begin to appear. There is actually a slowing of the neurodegeneration,” said Professor Masters.
Autosomal-dominant Alzheimer’s affects families with a genetic mutation, predisposing them to the crippling disease. These families provide crucial insight into the development of Alzheimer’s because they can be identified years before symptoms develop. The information gleaned from this group will also influence treatment offered to those living with the more common age-related version. Only about one per cent of those with Alzheimer’s have the genetic type of the disease.
The next part of the study involves a clinical trial. Using a range of imaging techniques (MRI and PET) and analysis of blood and cerebrospinal fluid, individuals from the US, UK and Australia will be observed as they trial new drugs to test their safety, side effects and changes within the brain.
“As part of an international study, family members are invited to be part of a trial in which two experimental drugs are offered many years before symptoms appear,” Prof Masters says. “It’s going to be very interesting to see how clinical intervention affects this group of patients in the decades before symptoms appear.”
The Florey is looking to recruit more participants in the Dominantly Inherited Alzheimer Network (DIAN) study. Those who either know they have a genetic mutation that causes autosomal-dominant Alzheimer’s or who don’t know their genetic status but have a parent or sibling with the mutation are invited to email: firstname.lastname@example.org