Celestial Highlights for May 2013
Posted: Wednesday, May 1st, 2013
by Robert Victor and Robert D. Miller
May 2013 has some very special sights involving members of our solar system.
(1) Jupiter in W to WNW and Saturn in SE can be seen simultaneously almost 20° above opposite horizons in deep twilight in early May, providing good telescopic views of Jupiter’s cloud belts and Galilean moons, and Saturn’s rings, within a single session. This chance to catch Jupiter and Saturn conveniently in evening twilight occurs before the end of the current school year. Each year from now until Jupiter overtakes Saturn in December 2020, the range of dates for viewing the two giant planets simultaneously in evening twilight will widen, but shift later in the calendar. So, take advantage of this month’s fine opportunity to share views of Jupiter and Saturn with your students!
(2) The Moon graces the sky in evening mid-twilight during May 10-24, while waxing from a very thin crescent low in WNW to lower left of Venus on May 10, to Full, low in ESE, on May 24. Follow this link to Sky Calendar www.pa.msu.edu/abrams/SkyCalendar/ for views of Moon passing planets and bright stars during the month, including Venus on May 10, Jupiter on May 11 and 12, and Saturn on May 22. Look early on Friday May 10, from a place with an unobstructed view: Twenty-five minutes after sunset, Moon and Venus are only 4°-5° up in WNW, with Moon appearing as a very thin crescent just 26-27 hours after New and within 2° lower left of Venus. This will be the first and closest of nine monthly pairings of Moon and Venus during that planet’s evening apparition ending in early January 2014. Most of these pairings will be wide, 6°-9° apart, except for May 10, less than 2°, and September 8, less than 3° apart at dusk.
As twilight fades on May 10, look for Jupiter 18° upper left of the Moon-Venus pair. Can you spot Aldebaran, eye of Taurus the Bull, 11° below Jupiter? On May 11, the Moon will be higher, appearing 5° above Aldebaran and 6° below Jupiter. On May 12, the waxing crescent will appear 7° upper left of Jupiter.
On May 14 and 15, the fat crescent Moon passes widely south of Gemini’s “twin” stars, Pollux and Castor, and on May 17, the First Quarter Moon, half full and 90° E of the Sun, passes widely south of Regulus, heart of Leo, the Lion
On May 18, just one week after Mercury passes behind the Sun, our solar system’s innermost planet can be spotted very low in evening twilight, half an hour after sunset. Find Venus very low in WNW, with Jupiter 10° to its upper left, and Mercury 5° to lower right, the three planets spanning 15°. Binoculars will provide a better view. Saturn is also visible in ESE. On this night the four planets Mercury-Venus-Jupiter-Saturn span an arc of 150° across the sky. Follow them in the WNW nightly and watch for wonderful changes in coming days and weeks. Venus and Jupiter, the two brightest, appear within 5° of each other during May 23-June 1.
On May 21, find Virgo’s brightest star Spica just 4° lower left of the waxing gibbous Moon. On May 22, Saturn is within 5° to the Moon’s upper left
On Friday, May 24 the Full Moon is unusually bright. For more on the Full Moon, see the May Sky Calendar, its left margin notes, and the link at the end of those notes.
(3) Most compact gathering of three planets, from Friday, May 24 through Wednesday, May 29 (six evenings): Venus, Jupiter, and Mercury fit within a 5° field of view of binoculars (permitting magnifications of up to about 10X to fit them all in), forming a trio. On Friday, May 24 at dusk, Mercury passes just 1.4° N (upper right) of Venus, with Jupiter less than 4° to Venus’ upper left. The most compact gathering occurs on Sunday, May 26 of Memorial Day weekend, when all fit into a field less than 3° across. On that evening, Mercury passes 2.4° to the upper right of Jupiter, with both planets 2° from Venus. Saturn is in SE, 135° from Venus. On Tuesday, May 28, the two brightest planets, Venus and Jupiter, appear closest, just over 1.0° apart.
Illustrations of the gathering of planets for each evening in the latter half of May are provided on the Sky Calendar.
Here is our monthly evening twilight chart, with descriptions following:
At the start of May in evening mid-twilight, the three brightest objects are: Yellowish Jupiter shining steadily just north of west; blue-white twinkling Sirius in SW; and golden Arcturus well up in the east. As weeks pass, Jupiter sinks almost all the way down to the WNW horizon and by May’s end is replaced by two planets emerging from the far side of the Sun and climbing above Jupiter.
For Los Angeles, Palm Springs, and other places near lat. 34° N, evening mid-twilight during May occurs about 42-46 minutes after sunset. For northern California, mid-twilight from lat. 40° N in May occurs about 47-52 minutes after sunset.
During May each year, the greatest number of stars of first magnitude or brighter can be viewed simultaneously during evening twilight. Early in May, after Vega has risen in the northeast and before Rigel sets between W and WSW, 11 of the 15 or 16 stars of first magnitude or brighter visible from California can be spotted.
We invite you and your students to use the accompanying evening twilight sky chart for May 2013 to identify up to four naked-eye planets and the brightest stars as they first appear after sunset. Three of the planets, Venus, Jupiter, and Mercury, will form a spectacular compact gathering May 24-29, all fitting within a binocular field no more than 5° across.
Try this evening twilight sky watching project: In May, in order, Rigel, Aldebaran, Sirius, and Betelgeuse will disappear into the western evening twilight glow, and in June, Jupiter quickly departs, followed by Procyon, Mercury, and Capella. Make a checklist of all the objects plotted on our May evening twilight sky map, including the naked-eye planets. Keep daily records of which objects you can see within an hour after sunset, and try to determine the first and last dates of visibility for each object.
The appearances and disappearance of stars occur on nearly the same dates each year (for a given latitude), and so the observations can be used to keep a calendar. As an example, ancient Egyptians used the first morning rising of Sirius to warn when the annual flooding of the Nile was about to occur. In current times, depending on your location, you shouldn’t do your spring planting until Sirius (or some other star) has left the early evening sky.
Posted: Wednesday, October 12th, 2016
by Jessica Sawko
In June 2016 California submitted a waiver application to discontinue using the old CST (based on 1998 standards) and conduct two years of pilot and field tests (in spring 2017 and 2018, respectively) of the new science assessment designed to support our state’s current science standards (California Next Generation Science Standards (CA-NGSS) adopted in 2013). The waiver was requested because no student scores will be provided as a part of the pilot and field tests. The CDE received a response from the U.S. Department of Education (ED) on September 30, 2016, which provides the CDE the opportunity to resubmit a revised waiver request within 60 days. The CDE will be revising the waiver request and resubmitting as ED suggested.
At its October 2016 North/South Assessment meetings CDE confirmed that there will be no administration of the old CST in the spring of 2017. (An archive of the meeting is available at http://www.cde.ca.gov/ta/tg/ai/infomeeting.asp.) Learn More…
Posted: Thursday, September 22nd, 2016
by Carol Peterson
1) To celebrate the 100th anniversary of the National Park Service, Google has put together a collection of virtual tours combining 360-degree video, panoramic photos and expert narration. It’s called “The Hidden Worlds of the National Parks” and is accessible right from the browser. You can choose from one of five different locales, including the Kenai Fjords in Alaska and Bryce Canyon in Utah, and get a guided “tour” from a local park ranger. Each one has a few virtual vistas to explore, with documentary-style voiceovers and extra media hidden behind clickable thumbnails. Ideas are included for use in classrooms. https://www.engadget.com/2016/08/25/google-offers-360-degree-tours-of-us-national-parks/. Learn More…
Posted: Thursday, September 22nd, 2016
CSTA is pleased to announce the winners of the 2016 CSTA Awards for Distinguished Contributions, Margaret Nicholson Distinguished Service Award, 2014 and 2015 PAEMST-Science recipients from California, and the 2016 California PAEMST Finalists. The following individuals and organizations will be honored during the 2016 California Science Education Conference on October 21- 23 in Palm Springs. This year’s group of awardees are truly outstanding. Please join us in congratulating them!
Margaret Nicholson Distinguished Service Award
The Margaret Nicholson Distinguished Service Award honors an individual who has made a significant contribution to science education in the state and who, through years of leadership and service, has truly made a positive impact on the quality of science teaching. This year’s recipient is John Keller, Ph.D. Dr. Keller is Associate Professor, Cal Poly San Luis Obispo and Co-Director, Center for Engineering, Science, and Mathematics Education, Cal Poly San Luis Obispo. In her letter of recommendation, SDSU science education faculty and former CSTA board member Donna Ross wrote: “He brings people together who share the desire to make a difference in the development and implementation of programs for science teaching. Examples of these projects include the Math and Science Teaching Initiative (MSTI), Noyce Scholars Program, Western Regional Noyce Initiative, and the Science Teacher and Researcher (STAR) program.” Through his work, he has had a dramatic impact on science teacher education, both preservice and in-service, in California, the region, and the country. He developed and implemented the STEM Teacher and Researcher Program which aims to produce excellent K-12 STEM teachers by providing aspiring teachers with opportunities to do authentic research while helping them translate their research experience into classroom practice. SFSU faculty member Larry Horvath said it best in his letter:“John Keller exemplifies the best aspects of a scientist, science educator, and mentor. His contributions to science education in the state of California are varied, significant, and I am sure will continue well into the future.” Learn More…
Posted: Tuesday, September 20th, 2016
by Peter A’hearn
NGSS is a big shift. Teachers need to learn new content, figure out how this whole engineering thing relates to science, and develop new unit and lesson plans. How could NGSS possibly make life easier?
The idea that NGSS could make our lives easier came to me during the California State NGSS Rollout #1 Classroom Example lesson on chromatography. I have since done this lesson with high school chemistry students and it made me think back to having my own students do chromatography. I spent lots of time preparing to make sure the experiment went well and achieved the “correct” result. I pre-prepared the solutions and organized and prepped the materials. I re-wrote and re-wrote again the procedure so there was no way a kid could get it wrong. I spent 20 minutes before the lab modeling all of the steps in class, so there was no way to do it wrong. Except that it turns out there were many. Learn More…
Posted: Tuesday, September 20th, 2016
by Robert C. Victor. Twilight sky maps by Robert D. Miller. Graph of evening planet setting times by Dr. Jeffrey L. Hunt
Our evening twilight chart for September, depicting the sky about 40 minutes after sunset from SoCal, shows brilliant Venus remaining low, creeping from W to WSW and gaining a little altitude as the month progresses. Its close encounter within 2.5° N of Spica on Sept. 18 is best seen with binoculars to catch the star low in bright twilight. The brightest stars in the evening sky are golden Arcturus descending in the west, and blue-white Vega passing just north of overhead. Look for Altair and Deneb completing the Summer Triangle with Vega. The triangle of Mars-Saturn-Antares expands as Mars seems to hold nearly stationary in SSW as the month progresses, while Saturn and Antares slink off to the SW. Learn More…