Tuesday, October 31, 2017

Monthly Night Sky Report: November 2017

I hope that you were able to get out and see some of the things I talked about last month.  October wasn't too terribly cold during the night.  Please let me know what you saw!

The cold temperatures have arrived for Utah and probably for most of my readers.  November will likely bring snow and icy conditions making the nights miserable.  I hope that you will still find the time, maybe just a couple of minutes, to go out and take a look at the stars.  Perhaps when you take the garbage out at night or while you are waiting for your car to warm up in the morning, take a look at the wonders above you.

November will bring planetary conjunctions, a meteor shower, a comet, and another asteroid.  Jupiter will return to our view and Mars will brighten, making it easier to see in the morning sky.

-Mercury


For most of my readers, Mercury will be visible in the western sky after sunset.  The innermost planet will reach high enough and shine bright enough for viewers to easily see it in the twilight glow.  By mid-month, Mercury will be found passing closely by the red star, Antares.  The last week of November will have Mercury reaching its greatest eastern elongation, which is the furthest eastern point Mercury reaches in its orbit of the Sun from our earthly perspective.  During this week, Mercury can be found approximately 3 degrees south of Saturn.

-Venus


Our sister planet is having a hard time rising before the morning Sun.  During the first week of November, Venus will rise about 90 minutes before the Sun and shine brightly, making it easily visible.  On the first, the star, Spica, can be found just south of Venus, which is about 100 times dimmer than Venus, from our perspective.  By the 2nd week, Venus and Jupiter will pair up in the morning sky lying less than a degree apart in our sky.

-Mars


Our most studied planet in the solar system will continue to be found in our morning skies.  The first week of the month, Mars will rise about 3 hours before sunrise in the East.  By month's end, this time will increase to 4 hours before sunrise.  The view of Mars through binoculars will increase the brightness and reddish glow.  The view through a telescope will be much the same.  Don't expect to see much detail until next year, when Mars will reach opposition in July.  I will remind you around that time, but this will be the best opposition of the red planet in 15 years!

-Jupiter


As mentioned, Jupiter will also be found in the morning sky with Mars and Venus.  It will continue to rise earlier each week and make it higher in the eastern sky before the Sun's glow wipes it from view.  On the 13th, Jupiter and Venus will create the best planetary conjunction of 2017.  If you have the chance, be sure to look!  If you have a telescope and don't mind the cold, both planets can be found in the same field of view.  You will also be able to see the Galilean Moons of Jupiter.  On the 16th, the Moon will join the two planets.

-Saturn


The ringed planet will be lost in the evening twilight by month's end. It can be found in the southwestern sky after sunset at approximately 15° above the horizon.  The best views, will of course be through a telescope early in the month.  Unfortunately, it was last month when the rings were at maximum tilt for us Earthly observers.

-Uranus


Uranus can be found in the constellation of Pisces the Fish, which is the constellation just east of Aquarius, where Neptune can be found.  Uranus shines nearly 8 times brighter than Neptune, so if you are able to get away from all of the light pollution, you should be able to spot this planet with your unaided eyes.  Uranus can be found high in the east after sunset and will travel to the southwest as the night continues.  This puts the planet in prime position for views through binoculars or a telescope.  For astrophotographers, you should be able to easily capture this planet in your images.

-Neptune


Our most distant known planet can be found in the constellation of Aquarius all month.  It will be found high in the southern skies after sunset.  You will need at least a pair of binoculars to view this planet.  Through a telescope, Neptune will appear as a blue-gray disk.


-The Moon


I thought I would add an extra section for my readers that are interested in observing the Moon.  On the night of the 5th, our closest celestial neighbor will be found in Taurus the Bull.  You may notice that the brightest star, Aldebaran, of this constellation will be missing!  The Moon will be blocking this star from view.  If you continue watching, you can watch Aldebaran reappear as the Moon continues its orbital motion.  This should happen at around the time the Moon rises in the east (approximately 7:00 P.M.) for my readers in Utah.  If you have a pair of binoculars or a telescope, just target the Moon's dark edge and watch.

I always find it fascinating to look at the Moon through a telescope or binoculars.  The extra light gathering power can enhance the views of the craters, mountains, and plains of the Moon.  Each night, the terminator line, the part where the bright area and dark area meet, changes and is the best place to look at the details.  Please be sure to give this area a look if you get the chance.


-Meteor Shower


The meteor shower this month peaks under a Moon free sky.  It will appear to radiate from the constellation of Leo the Lion, hence the name of the Leonid meteor shower.  It will peak on the 17th with an average rate of 10 meteors per hour.  The best viewing time is 3:00 A.M. until the rising Sun's glow gets too bright to view the meteors.


-Monthly Breakdown


As the heading states, here is your breakdown for the month of November.

November 04:  Full Moon.
November 05:  The Moon will block Aldebaran.  Look to the East as the Moon rises (for Utah).
November 12:  Mercury can be found close to Antares.
November 13:  Jupiter and Venus conjunction.  Best of 2017!
November 14:  Mars and the Moon have a close encounter.
November 16:  Jupiter and the Moon have a close encounter.
November 17:  Venus and the Moon have a close encounter.
November 17:  Leonid meteor shower peak.  Look east around 3:00 A.M.
November 18:  New Moon.
November 20:  The Moon visits Mercury and Saturn.
November 23:  Mercury reaches greatest eastern elongation.
November 27:  Mars passes close to Spica.
November 28:  Mercury and Saturn can be found close together.

-History Report


With only a couple of topics from years past, November is another quiet month for my History Report.  I will start with November 12, 1980.  On this day, the space probe, Voyager 1, flew past Saturn and returned the first images of this planet that were not taken from Earthly based cameras.  I knew that Voyager's 1 and 2 were launched to take a "tour" of our solar system by visiting the outer planets.  What I did not know, but it does make sense, is that the planets had to be in just the right position for this to happen.  Each craft had to use the gravity of the outer planets to reach their next target.  For example, when Voyager 1 reached Jupiter, it had to swing around the planet to help hurtle itself towards Saturn.  Then do this same thing around Saturn to reach Uranus, and so on.  As mentioned in an earlier post, both of these missions started in 1977 and have continued until the writing of this post.  The Voyager missions discovered the ring systems on all of the outer planets, excluding Saturn, the volcanic activity of Io, a moon of Jupiter, and the discovery of more moons around all of the outer planets then was previously known, among other things.  Voyager 1 also returned images of Earth from the outer solar system.  You can read more about the Voyagers by clicking here!

My next topic is the landing of Apollo 12 on the Moon.  This happened on November 19, 1969.  This is just a day shy of 4 months after the famous Apollo 11 mission.    Apollo 12 launched on the 14th and consisted of three astronauts.  They were, the Commander, Charles Conrad Jr., the Lunar Module Pilot, Alan Bean, and the Command Module Pilot, Richard Gordon Jr.  The purpose of this mission was to collect additional lunar samples, set up some equipment to detect seismic activity and other scientific data over a long period of time.  The astronauts returned safely to Earth on the 24th by landing in the Pacific Ocean.  If you would like to read more about this mission, please click here!

Stay tuned for a quick post in a few days!

Now get outside and look up!



Sunday, October 1, 2017

Monthly Night Sky Report: October 2017

The spooky month of October is here.  With it, the days become shorter and the nights longer, as well as much cooler weather, typically.  The longer nights are great for stargazing, but the colder temperatures make it more difficult for observers to spend the night under the stars.

Astronomically, October will bring a decent meteor shower without interference from the Moon, a planet reaching opposition, a dim comet, an asteroid that can be viewed through binoculars, and even a disappearing star!

Beginning with the planets, as usual, Mercury will not be visible until months end, as it will reach a point in its orbit called superior conjunction.  This places the planet behind the Sun from our point of view on Earth.  When Mercury returns, it can be found in the southwestern sky approximately 30 minutes after the Sun sinks below the horizon.  I hope that you will be able to catch a glimpse when Mercury returns.

Venus will continue to impress the early-risers with its luminosity.  It can be found the eastern, morning sky and will remain visible until shortly before sunrise.  By the 8th, Venus will pass from the constellation of Leo the Lion into the constellation of Virgo.  

Mars will join Venus in the morning sky.  On the first morning of the month, Mars and Venus will appear very close in our sky.  In fact, this will be closest they have been since 1995.  So be sure to look if you have a clear sky.  Mars will follow Venus from Leo into Virgo four days after Venus, on the 12th.  The Moon will join these two planets on the 17th, creating quite a sight.

If you want to see Jupiter this month, you will have to be quick.  After the first week, Jupiter will be below our horizon before it is dark enough to see it.  It can be found in the west about 30 minutes after sunset, but that time will shorten as the opening week of October progresses.  Jupiter will pass behind the Sun on the 26th from our vantage point.  Stay tuned for its reemergence in early November.

Saturn's earthly companion, Cassini, dived below the clouds mid-month last month, ending its 20-year mission.  But don't let that stop you from giving Saturn your attention this month.  If you have a telescope, or know someone that does, be sure to take a look at this ringed planet mid-month while its ring system is at its maximum tilt for Earth.  The last time the rings were at this position was 14 years ago and it won't happen again for another 15 years.  This tilt of the rings offers excellent views.

The planet that reaches opposition this month is Uranus.  This happens on the 19th, making it visible all night.  This will be the brightest the planet will shine for earth-bound observers.  If you are able to get to a dark sky, you should be able to see it with unaided eyes.  Using binoculars and a telescope will greatly enhance your views as well as the blue-green color of Uranus.

Neptune can be found in the southeastern sky after sunset.  However, you will need binoculars or a telescope to spot this planet.  It will appear blue-gray in color and should be easy to tell apart from the background stars in your field of view.  For those in the northeastern United States or eastern Canada, you can view a rare event if you have a 6 inch or larger telescope.  On the 5th, Triton, a moon of Neptune, will pass directly in front of the planet so be sure to look if you have a clear sky.  On this same night, Triton will pass in front of a star, blocking it from our view.  This star has an impressive name of 4U 410-143659.  As mentioned, you will need a telescope to view this event.

The Orionid meteor shower will peak on the 21st with a maximum rate of 20 meteors per hour.  These meteors will appear to radiate from the constellation of Orion the Hunter so be sure this constellation is in clear view when you go out to watch.  The Moon will not interfere with this shower like it has for other showers earlier this year.

If you are able to get to dark sky between the 17th and November 2nd, try to see if you can spot the zodiacal light.  It will be visible in the eastern morning sky before sunrise.  This light is caused by sunlight reflecting off of dust particles, called cosmic dust, in the solar system.  While you can see this light year round if you can get away from all light pollution, the best time is close to the spring and autumn equinox.

Comet PANSTARRS (C/2015 ER61) can be found slightly below the Pleiades star cluster during the first night of October.  However, the Moon will interfere with views until after the 10th.  Unfortunately, you will need a 4-inch or larger telescope to view this comet.

The asteroid, Iris, will be visible this month as well.  If you are able to get to dark sky, you should be able to spot it with unaided eyes, but even if you live in the suburbs, you can still see it with a pair of binoculars.  It can be found in the constellation of Aries the Ram near its brightest star, Hamal.  This constellation can be found high in the eastern sky by mid-evening.  Iris will reach opposition on the 29th, causing it to shine slightly brighter.

Here is the breakdown for October.

October 05:  Mars and Venus make their closest approach since 1995 in the morning sky.
October 05:  Triton transits Neptune and makes a star "disappear".
October 17:  Mars, Venus, and the Moon appear close together.
October 19:  New Moon; Uranus at opposition.
October 21:  Orionid meteor shower peaks.
October 29:  Asteroid Iris is at opposition.  Look in Aries.

October is another quiet month astronomically speaking as far as history goes.  It is still an impressive month nonetheless as you will hopefully see.

Starting off the history lesson, on October 4, 1957, the Soviet Union was the first to launch a man-made satellite.  You have probably heard its name before, but perhaps did not realize it was the first satellite ever launched.  The launch of this satellite, designated as Sputnik 1, which means "fellow traveler", started the space age, as well as the space race between the United States and the Soviet Union.  The Sputnik program consisted of the first 5 missions which involved sending plants and animals into orbit to see what effects were caused by being in space.

Next on my list is another first by the Soviet Union.  On October 7, 1959 the space probe Luna 3 returned the first ever images of the far side of the Moon.  This was the first time that any human had seen the far side since the Moon is tidally locked with the Earth, meaning that only one side of the Moon ever faces the Earth.  These images showed that the far side is heavily cratered compared to the side that we see.  This shows astronomers that the Moon is less active volcanically on the far side than it was on the near side during the formation.

Now get outside and look up!