Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

2016 June 13

Unexplained Dimmings in KIC 8462852
Illustration Credit: NASA, JPL-Caltech

Explanation: Why does star KIC 8462852 keep wavering? Nobody knows. A star somewhat similar to our Sun, KIC 8462852 was one of many distant stars being monitored by NASA’s robotic Kepler satellite to see if it had planets. Citizen scientists voluntarily co-inspecting the data along with computers found this unusual case where a star’s brightness dropped at unexpected times by as much as 20 percent for as long as months — but then recovered. Common reasons for dimming — such as eclipses by orbiting planets or stellar companions — don’t match the non-repetitive nature of the dimmings. A currently debated theory is dimming by a cloud of comets or the remnants of a shattered planet, but these would not explain data indicating that the star itself has become slightly dimmer over the past 125 years. Nevertheless, featured here is an artist’s illustration of a planet breaking up, drawn to depict NGC 2547-ID8, a different system that shows infraredevidence of such a collision. Recent observations of KIC 8462852 did not detect the infrared glow of a closely orbiting dust disk, but gave a hint that the system might have such a disk farther out. Future observations are encouraged and creative origin speculations are sure to continue.

Come to know the Summer Triangle

We in the Northern Hemisphere can see the Summer Triangle for part of the night at any time of the year. But seeing it in summer is the most fun! As suggested by its name, the Summer Triangle is most prominent during the summer season, for us at mid-northern latitudes. Although the Northern Hemisphere’s summer solstice won’t be forthcoming for another week, we can often see the Summer Triangle at evening dusk by mid-June. Seeing the Summer Triangle again and again on summer nights is a deep pleasure that adds to the enjoyment of this season. So, as dusk deepens into night on a warm June or July night, look eastward.

How to find the Summer Triangle. As night falls in June or July, look east for a sparkling blue-white star, whose name is Vega. Reigning at the apex of the celebrated Summer Triangle, Vega overwhelms as the brightest of the Summer Triangle’s three glorious stars, all bright enough to be seen from many light-polluted cities.

It’s difficult to convey the huge size of the Summer Triangle asterism – a star pattern that is not a constellation. At nightfall in summer, look for the brightest star in your eastern sky. That’s Vega, the brightest star in the constellation Lyra the Harp. Look to the lower left of Vega for another bright star – Deneb, the brightest in the constellation Cygnus the Swan and the third brightest in the Summer Triangle. An outstretched hand at an arm length approximates the distance from Vega to Deneb.

Look to the lower right of Vega to locate the Summer Triangle’s second brightest star. That’s Altair, the brightest star in the constellation Aquila the Eagle. A ruler held at an arm length fills the gap between these two stars.

Summer Triangle as a road map to the Milky Way. If you’re lucky enough to be under a dark starry sky on a moonless night, you’ll see the great swath of stars known as the Milky Way passing in between the Summer Triangle stars Vega and Altair. The star Deneb bobs in the middle of this river of stars that passes through the Summer Triangle, and arcs across the sky. Although every star that you see with the unaided eye is actually a member of our Milky Way galaxy, oftentimes the term Milky Wayrefers to the cross-sectional view of the galactic disk, whereby innumerable far-off suns congregate into a cloudy trail of stars.

Once you master the Summer Triangle, you can always locate the Milky Way on a clear, dark night. How about making the most of a dark summer night to explore this band of stars – this starlit boulevard abounding with celestial delights? Use binoculars to reel in the gossamer beauty of it all, the haunting nebulae and star clusters of a midsummer night’s dream!

Some see the Summer Triangle as a great big “V” for vacation, with Altair marking the point of the “V.” In summer, the Summer Triangle appears in the east at nightfall, high overhead after midnight and in the west at dawn. All night long on a summer night, the stars of the Summer Triangle – as if school kids on vacation – waltz amidst the streetlights of the Milky Way galaxy.

Summer Triangle as nature’s seasonal calendar. The Summer Triangle serves as a stellar calendar, marking the seasons. When the stars of the Summer Triangle light up the eastern twilight dusk in middle to late June, it’s a sure sign of the change of seasons, of spring giving way to summer. However, when the Summer Triangle is seen high in the south to overhead at dusk and early evening, the Summer Triangle’s change of position indicates that summer has ebbed into fall.

Bottom line: Coming to know the Summer Triangle, then seeing it again and again on summer nights, is a deep pleasure that adds to the enjoyment of this season.

Author

The Words of Confucius

Virtuous people often revenge themselves for the constraints to which they submit by the boredom which they inspire.

Your Daily Influences
June 13, 2016

The Eight of Wands Reversed
Delay seems probable. Jealousy may become a problem

Perthro
This may be a period of loneliness and stagnation you must fight through. This may not be a good time for you to take chances or indulge in any form of gambling.

Necklace of Charms
What you need in this aspect is a bit of understanding. You can find happiness in abundance if you understand and accept the differences of those with whom you share your life within this aspect.

Your Daily Influences represent events and challenges the current day will present for you. They may represent opportunities you should be ready to seize. Or they may forewarn you of problems you may be able to avoid or lessen. Generally it is best to use them as tips to help you manage your day and nothing more.

Your Charm for Today

Today’s Meaning:
A journey that you or someone close to you must make will have a positive influence on this aspect. This trip may be over a great distance.

General Description:
This charm was worn by the ancients to protect the wearer against disease and snake bites. The Jews used it as an amulet for epilepsy and erysipelas. It is still used in Ireland as a talisman against sickness. The Tau is one of the most ancient crosses and the forerunner of the Latin Cross. Moses used the Tau Cross with the brazen serpent attached, to save the Children of Israel in the wilderness from the attacks of the fiery serpents. The Cross has always been the symbol of life eternal. It was this mark, the Tau Cross, that was placed upon the foreheads of those exempted from Divine wrath in Jerusalem.

Your Crowley Thoth Tarot Card for Today

Aeon

Aeon deals with our journey and constant transformation through time. It denotes both endings and beginnings, our ability to redeem ourselves through action, and hope for the future. Aeon teaches us to accept our past–embrace it as an essential component of our being–but not to allow it to keep our spirits from moving towards the future and finding our personal utopia.

Today’s Witches Rune

Harvest

Meaning: This is a very positive rune, related to abundance, rewards, growth and benefits. But it’s important to not mistake this rune for mere luck… while luck may help, the Harvest rune is usually related to the blessings that you have brought to yourself and to others, through your actions and investments.

“Reaping what you sow” is the message of the Harvest rune, but with a positive connotation. All that you worked and fought so hard to get will finally come to you, and you’ll be able to enjoy a time of tranquility, optimism and expansion. As the obstacles that were (or still are) in the way become smaller, you have a solid ground to reach out for your dreams.

Thus, the Harvest rune is a positive sign, telling you that you are in right path. However, it’s important to know that this symbol is always attached to personal responsibility… it’s what you do with your tools (whether they be mental, emotional or physical) that determines what you’ll get back in the end. Use them wisely, and luck will serve you well.

On a more negative side, this rune can make one sleep on their laurels and cling to past victories. One can become too reliant on “what works” and refuse to try new things (specially if the Crossroads rune is near). The Harvest runes should inspire you to take some risks and keep evolving, and not to crystalize yourself in one position because it proved to be successful.

In relationship readings, this symbol is connected to more practical aspects than emotional ones. Usually it represents couples who grow together, financially, socially and/or professionally. Security becomes an important factor when the Harvest appears. It represents the moment in which the couple begins to build their nest together, and think about starting a family. This rune tends to be very positive for all relationships, but doesn’t always inspire much passion.

Your Ancient Symbol Card for Today

The Storm

The Storm represents the trouble and discord that creep into our lives from time to time. The storm is represented by a tornado whirling its way across a fertile plain. Tornados are powerful but relatively small, short lived storms, which means that while the turmoil they indicate may be strong it will at least pass quickly. Like the tornado, The Storm is a force outside yourself and beyond your control. During a stormy period you may lose ground. However, knowing one is upon you can certainly help you keep your losses to a minimum, or even turn what might be a disaster into a windfall.

As a daily card, The Storm denotes a time when you should be prepared to face some large challenges in your life. You may find yourself losing more than you gain for awhile. The key to weathering the storm is preparation. You know its coming, so be ready for it and there is a possibility that you can transform a tumultuous event into something good.

Your Rune Reading for the Upcoming Week

That Which is Behind You
Othala

Othala represents a solid, immovable home, prosperity and safety. Good fortune based on your heritage and character is yours to enjoy.

Your Present Position You Find Yourself In
Isa

The Ice Rune, represents stagnation and a passionless existence. Your life’s course may seem blurry at the moment, but if you persevere you will move onto better days.

A Glimpse of the Future
Mannaz

Now is the time for you to explore your inner self and those of others. Your intelligence and creativity are very well honed at the moment. Cooperation from and with others should be very easy to attain.