Swarms of Galaxies
If you are a lover of distant galaxies, you must be full of joy at this time of year. Stretching from the Bowl of Ursa Major all the down to the highly populated grouping known as the Virgo cluster, literally hundreds of galaxies are available for your choosing. Depending on the light-gathering power of your telescope, some might be out of your viewing range. But do not fret; there is a nice combo of semi-bright and extremely faint grey smudges to choose from.
As we continue from last month’s review starting with the Big Bear himself, we continue snaking our way down the path of cosmic islands. Leaving Ursa Majoris, we slide down to Canes Venatici to the brightest galaxy of this constellation. M94 is a slightly elongated, tightly wound galaxy with a very bright core. Even face-on this 14 million light-year (ly) object still glows at magnitude 8.2 and is a definite stop on your galactic survey. Detailed images show active star-forming regions (in red) dotted along the outer edges of the galaxy like a string of pearls.
Charts reproduced and modified from TheSky
Move your scope less than five degrees to the west to swoop upon M63. Just a tad fainter then its Messier neighbour, the magnitude 8.6 Sunflower Galaxy is estimated at some 33 million ly away. Check out the portrait Serge Theberge captured showing many more emission nebulae. Pierre Méchain discovered it on June 14, 1779, the same day the great comet hunter Charles Messier included the entry in his famous catalogue of celestial objects.
As an offset, look for the highly resolved globular cluster registered as M3. Just on naked eye limits it lights up the eyepiece at magnitude 6.2 and is only 33,000 ly in our Milky Way Galaxy and takes up about half the size of the full moon.
Photo by Serge Theberge
Lower your telescope to the constellation Coma Berenices until you come across an inverted letter “Y”, more commonly known as Mel 111. Now that you are here, you must find and enjoy the edge-on beauty of NGC 4565. Pretty well any instrument will reveal its sharp dust lane – dark interstellar cloud and star soot which obscures light. Take your time on this 31 million ly gem. Toward the upper boundary of this constellation is a pretty pair of 10th magnitude galaxies. NGC 4274 and NGC 4278 show up nicely in a wide-angle eyepiece. Lying within the size of the moon they take on the orientation of elongated and round respectively. In fact, NGC 4274 produced Supernova 1999ev.
Now we come to the piece de resistance, the Virgo Cluster of galaxies. This is by far the Mecca of galactic groups. You can easily spend a couple of nights in this region. Although it is referred to as Virgo, many fine galaxies also populate Coma to the north. So where do we begin? Frankly anywhere you want. There are far too many to list in this article.
I love to begin looking at the great galaxy group of M84 and M86 (the brightest two round galaxies) along with a few other NGCs in a wide field of view. 84 and 86 are both estimated at about 60 million ly away and are magnitudes 9.1 and 8.6 respectively.
Close to the 12th magnitude limits are the team of NGC 4550 and NGC 4551. Although they seem close together, they are not interacting with each other.
By far the take in the astronomical community is the preliminary findings of Gliese 581c to sport a possible Earth-like planet in a very important way. Known as the Goldie Locks scale, such as this planet is too hot – this planet is too cold, but this one is just right to hold liquid water which could lead to life of some sort. The planet is about one and a half times our size and gravity would be about twice that as on Earth. Gliese 518 actually possesses three planets in its system.
The planetary system circles a cooler red giant and the planet in question is so close, it orbits the star in a mere 13 days. Temperatures are estimated to range from 0 degrees C to about plus 40 degrees C. Gliese 581 is located on the constellation Libra and is a stone’s through at only 20 ly away. Stay tuned as this new discovery unravels.
Be sure to check the western skies on Saturday evening May 19th as the Moon and Venus paint another lovely portrait. Our dear satellite will really be in the news at the end of the month. May 31 will deal us another full moon in the same month. This second full moon is called a Blue Moon.
The Moon itself does not change colour but there have been a few instances in recorded history when the Moon and even the Sun appeared blue in the sky. The spectrum of light was altered during volcanoes and more recently during the forest fires in the western provinces.
As the weeks till by, so are your chances of seeing the ringed marvel – Saturn before she sinks into the western haze. Jupiter is now announcing itself around at the first of the month and locally by month’s end. The red planet Mars is sharing the constellation of Aquarius with the distant planet Uranus. Both planets were peeking about the east horizon a little before astronomical twilight begins.
Until next month, clear skies everyone
Gary Boyle
Object | Type | Magnitude | RA | DEC |
---|---|---|---|---|
M3 | Globular cluster | 6.4 | 13h 43m | 28d 20m |
M53 | Globular cluster | 7.7 | 13h 13m | 18d 07m |
M63 | Elongated galaxy | 8.6 | 13h 16m | 42d 02m |
M65 | Elongated galaxy | 9.3 | 11h 19m | 13d 02m |
M84 | Round galaxy | 9.3 | 12h 25m | 12d 50m |
M86 | Round galaxy | 9.2 | 12h 26m | 12d 54m |
M90 | Elongated galaxy | 9.5 | 12h 37m | 13d 07m |
M94 | Elongated galaxy | 8.2 | 12h 51m | 41d 04m |
M95 | Barred galaxy | 9.7 | 10h 44m | 11d 19m |
NGC3344 | Round galaxy | 10.0 | 10h 43m | 24d 52m |
NGC3377 | Elongated galaxy | 10.2 | 10h 48m | 13d 56m |
NGC3486 | Round galaxy | 10.3 | 11h 01m | 28d 55m |
NGC3489 | Round galaxy | 10.3 | 11h 00m | 13d 51m |
NGC3521 | Elongated galaxy | 8.9 | 11h 06m | 00d 04m |
NGC3607 | Round galaxy | 10.0 | 11h 17m | 18d 00m |
NGC3640 | Round galaxy | 10.3 | 11h 21m | 03d 11m |
NGC4151 | Round galaxy | 10.4 | 12h 11m | 39d 22m |
NGC4214 | Spiral galaxy | 9.7 | 12h 16m | 36d 17m |
NGC4244 | Edge-on galaxy | 10.2 | 12h 18m | 37d 46m |
NGC4261 | Round galaxy | 10.3 | 12h 19m | 05d 46m |
NGC4274 | Elongated galaxy | 10.4 | 12h 20m | 29d 34m |
NGC4278 | Round galaxy | 10.2 | 12h 20m | 29d 14m |
NGC4380 | Round galaxy | 12.0 | 12h 26m | 09d 59m |
NGC4411 | Round galaxy | 12.8 | 12h 27m | 08d 49m |
NGC4490 | Spiral galaxy | 9.8 | 12h 31m | 41d 36m |
NGC4550 | Edge-on galaxy | 11.6 | 12h 36m | 12d 10m |
NGC4551 | Round galaxy | 11.9 | 12h 36m | 12d 13m |
NGC4559 | Elongated galaxy | 9.9 | 12h 36m | 27d 55m |
NGC4565 | Edge-on galaxy | 9.6 | 12h 37m | 25d 56m |
NGC4606 | Elongated galaxy | 11.9 | 12h 41m | 11d 52m |
NGC4725 | Elongated galaxy | 9.2 | 12h 51m | 25d 28m |
NGC5005 | Elongated galaxy | 9.8 | 13h 11m | 37d 01m |