When you want to see the stars, find someplace dark
Not where I expected it, a tiny cavity in an otherwise sheer rock wall covered with sponge. It was red… A flash bright red in the dive light had my attention quickly. I could not see the fish well enough to ID it, red is uncommon enough that I set up and fired anyway, just taking a photo was hard enough in the surge.
Only after downloading the photo I realized it was a scarface blennie…
There is one question we all have to ask when a beautiful comet graces the skies…
Like any other solar system object, comets move against the sky. Even worse, when close to the Earth or Sun they can be moving so quickly against the stars that coordinates quickly become out of date. Aiming a telescope using coordinates a day old, or sometimes even only an hour old will result in a view of empty sky. A few stars perhaps, but no comet.
You need a table of coordinated calculated for regular time intervals, an ephemeris. Alternately you need a set of coordinates calculated for the exact time you will be looking.
Mercury will begin a morning apparition this week. The planet is currently about 10° above the rising Sun, climbing higher each morning. Look for a 2nd magnitude star-like object just above the glow of dawn. Mercury will reach a maximum elongation of 19° on November 17th.
This evening a pretty crescent Moon will be about 8° north of Venus. The brilliant pair will be high in the southern sky at sunset, rather hard to miss if you take a moment to look up. Take note of how far the planet is from the Sun, Venus is currently near maximum elongation, which occurred on October 31st.
Today at 01:29HST Saturn will pass through superior conjunction with the Sun. The planet will reappear in the dawn sky later in the month.
On the 23rd and 24th Saturn will be quite near the brightening comet C/2012 S1 ISON and the planet Mercury, creating an odd planet and comet conjunction. The trio will have about 5° separation. Even more odd, the comet 2p/Enke will be inside the triangle formed by the trio, probably at 7th magnitude.
It is possible to see planets in the daytime. Both Jupiter and Venus are bright enough to see fairly easily in full daylight if conditions are right. You need to know where and how to look, but once glimpsed they are fairly easily seen. It is the knowing how that makes it possible. Try these simple hints…
It is this last hint that can be particularly useful today. Venus is about 8° degrees south of the Moon today. It helps that Venus is near maximum elongation, as far as it will get from the Sun for this evening apparition. If you can find the Moon high in the midday sky check just below it for Venus. The planet will be about a sixteen lunar diameters away from the Moon, seen as a bright star-like object.
Have a try.
The little teardrop butterfly was playing peek-a-boo with me. It would peek out, the strobe would fire, it would dart back into the coral. Repeat cycle…
This little fish had good reason to be shy, it is a favorite of the aquarium collectors.
It was horrible. Yelling, screaming shoppers cram the aisle, while store security is helpless to intervene in the mayhem. A mob of shoppers fighting over the last red bottle. Black Friday sales? No. Just the struggle for the last shipment of Sriracha. Looming shortages have created a nationwide panic. Where will we get the spice!
Maybe not… A judge has ordered a partial shutdown of production at the Huy Fong Foods plant in Irwindale, California. It is not expected to impact supply, but fans of the sauce are jittery, with the possibility of a sriracha shortage making news across the country.
Supplies are still plentiful at our local supermarket. Just as a precaution I bought the large bottle.
W. M. Keck Observatory press release…
Scientists from University of California, Berkeley, and University of Hawaii, Manoa, have statistically determined that twenty percent of Sun-like stars in our galaxy have Earth-sized planets that could host life. The findings, gleaned from data collected from NASA’s Kepler spacecraft and the W. M. Keck Observatory, now satisfy Kepler’s primary mission: to determine how many of the 100 billion stars in our galaxy have potentially habitable planets. The results are being published November 4 in the journal Proceedings of the National Academy of Sciences.
“For NASA, this number – that every fifth star has a planet somewhat like Earth – is really important, because successor missions to Kepler will try to take an actual picture of a planet, and the size of the telescope they have to build depends on how close the nearest Earth-size planets are,” said Andrew Howard, astronomer with the Institute for Astronomy at the University of Hawaii. “An abundance of planets orbiting nearby stars simplifies such follow-up missions.”
Continue reading “One in Five Stars Has Earth-sized Planet in Habitable Zone”
Astronomers, professional and amateur alike, are getting ready for comet C/2012 S1 ISON, possibly the highlight of a year that has already seen several good comets.
Discovered in September 2012 by Vitali Nevski and Artyom Novichonok, of the ISON project, a group of telescopes dedicated to discovering and tracking solar system objects. The comet was then an 18th magnitude object in the outer solar system, an impressive find for a small telescope.
The next surprise was hinted at by the orbital calculations. The orbital solution indicated a nearly hyperbolic path, suggesting that this was a new comet, one that had not visited the inner solar system before. This possibility was strengthened by later observations of the comet.