THE WORLD AROUND USMountain Views-News Saturday, June 6, 2015 14 THE WORLD AROUND USMountain Views-News Saturday, June 6, 2015 14
PLUTO’S MOONS SEEN IN HIGHEST DETAIL YET
taproot. It’s very woody, but theskin can be readily peeled off. I
add to salads and other dishes as
give each student a piece of this
a tasty garnish.
root, and let them smell again.
The tender flower tips which
The odor of the root is much more
includes the tender stems—
pungent, and unmistakable. I
somewhat resembling Chinese
encourage them to taste a bit.
broccoli—can be snapped free,
“Tastes like radish,” most will say.
steamed or boiled, and served
Yes, indeed! It smells and tastes
with butter, cheese, or a spicy
like radish because that’s what
sauce. You’d serve this very
it is. This is the same botanical
much like asparagus, except they
plant which is cultivated, except
are much spicier.
this one is feral.
The green seedpods, which
For most people, the wild radish
somewhat resemble jalapeño or
root bears little resemblance
serrano chiles, can be nibbled
to the little round red things
when they are still tender inside
purchased in supermarkets,
and haven’t gotten woody. You
and eaten at Thanksgiving. And
can add the chopped tender
because the wild root is so woody,
pods to soups and salads, or try
it really isn’t all that useful for
pickling them. Once they get
food, unless you want to take the
old, and white inside, they are
time to peel each root and use just
already too old to eat and should
the skin.
be left alone to produce seed.
Occasionally, during wet
I make pickles very simply. I
winters and in very rich soil,
first wash a few cups worth of the
the radish plant will produce
tender pods, and then pack them
a root that is much less woody
into quart jars. I cover with raw
and more-or-less edible raw in
apple cider vinegar, and just let
salad, if you slice it up. Yes, it is
them set in the refrigerator for
much spicier than its domestic
a few weeks before eating. The
counterpart, but it can be eaten
vinegar will preserve them for
raw in rare cases.
years.
During one very wet year, I
RECOGNIZING THE WILD
pulled an amazing 16 pound wild
RADISH
radish root from out of the thick
pile of wood chips in which it was
As the plant flowers, instead of
growing. No one could believe it!
the usual yellow mustard flowers,
In fact, I have never seen a root
the flowers will be lavendar or
that size since. It was bigger than
white, or very rarely a pale yellow.
a human head. We cut into it, and
There is the typical Mustard
it was hollow, with a mustard-
family flower formula of 4 petals,
smelling liquid inside. The flesh
4 sepals, 6 stamens (4 long and 2
Much ink has been spilled over Pluto’s
reclassification as a dwarf planet. And yet, suchdiscussions have not diminished scientific interest
in Earth’s most distant cousin. A new study is thefirst to reveal fascinating details about the orbitaland rotational patterns of Pluto and its five known
moons.
The study, published in the June 4, 2015,
issue of the journal Nature, describes a systemdominated by Pluto and its largest moon,
Charon, which together form a “binary planet.”
Four smaller moons orbit this pair. The paperreports the techniques used to discover the twosmallest moons, Kerberos and Styx, and alsoprovides a detailed description of the strange andunpredictable rotational states of the two slightlylarger moons, Nix and Hydra.
Later this summer, NASA’s New Horizons
spacecraft will pass by Pluto and its five knownmoons, providing the most detailed look at thisplanetary system to date. Kerberos and Styx werediscovered in 2011 and 2012, respectively, whileNix and Hydra were first discovered in 2005.
“Like good children, our moon and most otherskeep one face focused attentively on their parentplanet,” said Douglas Hamilton, professor ofastronomy at the University of Maryland and a coauthor
of the Nature study. “What we’ve learned isthat Pluto’s moons are more like ornery teenagerswho refuse to follow the rules.”
The imbalanced and dynamically shiftinggravitational field created by Pluto and
Charon sends the smaller moons tumbling inunpredictable ways. The effect is amplified by thefact that the moons are roughly football shaped,
rather than rounded spheres. The findings are theresult of a comprehensive analysis of Hubble SpaceTelescope data regarding the orbits and propertiesof the four smaller moons.
In contrast to these seemingly random rotationalmotions, the moons follow a surprisinglypredictable pattern as they orbit the binary planetformed by Pluto and Charon. Three of them—
Nix, Styx and Hydra—are locked together inresonance, meaning that their orbits follow aclockwork pattern of regularity. The same effectcan be seen in three of Jupiter’s large moons.
“The resonant relationship between Nix, Styxand Hydra makes their orbits more regular andpredictable, which prevents them from crashinginto one another,” Hamilton said. “This is one
reason why tiny Pluto is able to have so manymoons.”
The study also revealed that Kerberos is as dark
as charcoal, while the other moons are as brightas white sand. “This is a very provocative result,”
said lead author Mark Showalter, a senior research
scientist at the SETI Institute. Astronomers had
predicted that dust created by meteorite impactsshould coat all the moons evenly, giving theirsurfaces a uniform look.
“Prior to the Hubble observations, nobodyappreciated the intricate dynamics of the Plutosystem,” Showalter said. The New Horizons flyby in
July may help solve the mystery of Kerberos’ darksurface, and will refine scientists’ understandingof the odd rotational and orbital patternsuncovered by Hubble. The New Horizons teamis using Showalter and Hamilton’s discoveries tohelp guide science planning efforts.
Among other expected insights, a more detailedstudy of the chaotic Pluto-Charon system couldreveal how planets orbiting a distant binary starmight behave. Although many exoplanets have
been found to orbit binary stars, these star systemsare too far away to figure out their rotationalpatterns using existing technology.
“We are learning that chaos may be a commontrait of binary systems,” Hamilton said. “It mighteven have consequences for life on planets orbitingbinary stars.”
You can contact Bob Eklund at: b.eklund@
MtnViewsNews.com.
By Christopher Nyerges
[Nyerges is the author of severalbooks on self-reliance and survival,
including “Guide to Wild Foodsand Useful Plants,” “ForagingCalifornia,” and more. He has
led Wild Food Outings since
1974. He can be reached at www.
SchoolofSelf-Reliance.com, or Box
41834, Eagle Rock, CA 90041.]
When I encounter a field of wild radishes in the
spring, I attempt to get my students to identify it by thearoma alone. I’ll first crush a bit of the stem, and let
them smell it.
“Oh, that’s very familiar” most of them will say. ThenI will pull up a root, which is a long carrot-like white
DISCOVERING THE WILD RADISH
Raphanus sativus and R. raphanistrum
are good in salads, you’d probably not care for a saladof only radish leaves. Mix them with other greens, andtoss in some tomatoes and avocado.
The leaves can also be added to soups, egg dishes,
and stews, used in pretty much the same way you’d usespinach greens.
The white to lavendar flowers are quite tasty andsweet when you first pick and nibble them, but yourmouth will get very hot. Eat them sparingly. Manytimes I’ve been out on a field trip with children, andthey taste a radish, and they like it. They eat another.
And another. And another. And before you know it,
they’re all yelling for water, which they all were askedto leave back in the school bus!
You can pick the flowers and
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was perhaps up to two inchesthick, and though a bit fibrous, was largely edible. Weall sampled a little of the raw, and very hot, root.
Normally, you won’t be eating the wild radish root,
but it’s still a very good find. Why? Because every partof the wild radish plant which is tender can be eaten!
And each part has a different texture and flavor whichlends it to different recipes.
EATING WILD RADISH
The leaves can be collected at any time in their growingcycle, cut into small pieces, and added to salads. Theyare hot and spicy, so add to other greens. Though they
short), and 1 pistil. The flowersare followed by fleshy seedpods that resemble pointedjalapeño peppers.
The root of wild radish is a white taproot, not at alllike the radish you might grow in your garden or buy inthe store. It is largely woody and inedible, though thereis a soft outer layer that can be peeled off. The taste ofthis outer root layer is so obviously “radish” that mostanyone can identify this plant by that aroma and flavor.
Overall, wild radish can get up to 4 and 5 feet inideal conditions. You find it in fields, wet bottom lands,
farms, vacant lots, and disturbed soils.
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