NATURE
MONCTON INFORMATION LINE, July 13, 2018 (Friday)
Please advise editor at nelson@nb.sympatico.ca if any errors are noted in wording or
photo labeling.
For more information on Nature Moncton, check into the website at www.naturemoncton.com
For more information on Nature Moncton, check into the website at www.naturemoncton.com
Transcript by: Louise Nichols nicholsl@eastlink.ca
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your message to the information line editor nelson@nb.sympatico.ca.
** There are certain bloodsucking insects that are
specific to amphibians and I’m assuming that it is one of these species that
Jamie Burris got a striking image of on a GREEN FROG [Grenouille
verte]. There is a
view at a distance and a close-up to clearly show the blood-engorged
insects. An incredible photo.
** Rheal Vienneau photographed a CRAB SPIDER
[Araignées-crabes] lurking on a Common Milkweed plant recently. We do have several species of Crab Spiders,
but the one in Rheal’s photo may be the most common. Crab spiders are hunters and ambushers, and
use their powerful front legs to grab and hold on to their prey while
paralyzing it with a venomous bite.
** Carmella Melanson got some striking photos of
the day-flying HUMMINGBIRD CLEARWING MOTH [Sphinx colibri] that does such an
excellent job of mimicking a hummingbird in its behaviour. After their egg-laying mission is complete,
the eggs will become one of those large green caterpillars we see in late
summer.
** Brian Stone got a photo of the plant SPEEDWELL
in bloom recently. We have a few
different species of Speedwell native to New Brunswick.
** We don’t see too many photos of the female ROSE-BREASTED GROSBEAK
[Cardinal à poitrine rose]. I’m attaching a photo of the female of the
pair patronizing our feeder yard.
** This week’s Sky-at-a-Glance is added to this
edition, courtesy of sky guru Curt Nason.
This Week’s Sky at a Glance, July 14 – July 21
Galaxies are favourite targets for amateur astronomers and many are visible with just binoculars. Two are easily seen with the naked eye in the southern hemisphere: the Large and Small Magellanic Clouds. The Andromeda Galaxy is a naked-eye blur for rural New Brunswickers and it looks majestic in binoculars. But there is one galaxy that is spectacular regardless of your location or observing equipment, and that is our home galaxy.
The Milky Way is at least 110,000 light years across, and although it is composed of 200 billion stars we can distinguish only about 4000 as individual stars from a rural area. The Sun is 27,000 light years from the galactic core, within a spur between the inner Sagittarius and outer Perseus spiral arms. When we look above the spout of the Sagittarius Teapot asterism we are looking toward the galactic core, but vast clouds of dust hide the stars between the spiral arm and the core. South of the head of Cygnus the Swan we see the Milky Way split in two by the Great Rift, one of those dust clouds.
Star formation occurs in clouds of gas and dust within the spiral arms and some can be seen as bright patches with binoculars. Just above the spout of the Teapot is M8, the Lagoon Nebula; and a hint of M20, the Trifid Nebula, can be seen in the same field of view above. Scanning to the upper left up the Milky Way you encounter M17, the Swan (or Omega) Nebula; M16, the Eagle Nebula; and star clusters such as M11, the Wild Duck Cluster in the constellation Scutum the Shield. A tour of the Milky Way under a dark sky can keep a binocular stargazer engaged for an evening.
This Week in the Solar System
Saturday’s sunrise in Moncton is at 5:41 am and sunset will occur at 9:07 pm, giving 15 hours, 26 minutes of daylight (5:49 am and 9:09 pm in Saint John). Next Saturday the Sun will rise at 5:48 am and set at 9:01 pm, giving 15 hours, 13 minutes of daylight (5:56 am and 9:03 pm in Saint John).
The Moon is at first quarter on Thursday, making a great week for public observing events. It passes just above Mercury this Saturday evening, is near Venus on Monday and Jupiter next Friday. Jupiter’s red spot faces our way at 10 pm on Thursday and, under steady sky conditions, it can be seen with a telescope. Saturn continues to give great views of its rings in a telescope. Mars looks awesome in the late evening; its bright yellow-orange colour really catches the eye.
The annual RASC NB star party at Mount Carleton Provincial Park occurs July 13-14, taking advantage of very dark and moonless skies. Public observing events are also scheduled for Thursday, July 19, at the ball field in St. Martins for Old Home Week, and at the Irving Nature Park in Saint John on Friday, July 20 at 9 pm (cloud date Saturday, July 21).
Questions? Contact Curt Nason at nasonc@nbnet.nb.ca.
Nelson Poirier,
Nature Moncton
CRAB SPIDER. JULY 12, 2018. RHEAL VIENNEAU
GREEN FROG WITH BLOOD SUCKING INSECTS ATTACHED. JUNE 20. 2018. JAMIE BURRIS
GREEN FROG WITH BLOOD SUCKING INSECTS ATTACHED. JUNE 20. 2018. JAMIE BURRIS
HUMMINGBIRD CLEARWING MOTH July 12th 2018 CARMELLA MELANSON
HUMMINGBIRD CLEARWING MOTH July 12th 2018 CARMELLA MELANSON
Milky Way
ROSE-BREASTED GROSBEAK (FEMALE) JULY 11, 2018. NELSON POIRIER
ROSE-BREASTED GROSBEAK (FEMALE) JULY 11, 2018. NELSON POIRIER
SPEEDWELL BLOOM. JULY 09, 2018. BRIAN STONE
SPEEDWELL PLANT. JULY 09, 2018. BRIAN STONE