January/February 2018 – Vol. 31 No. 2

A Predawn Lunar Eclipse, a Transit of Venus, and Other Sky Phenomena in June 2012 and Beyond

Posted: Monday, June 4th, 2012

by Robert C. Victor

We hope you enjoyed the annular or partial solar eclipse of May 20. Perhaps you’ll want to start planning to take in the next two total solar eclipses within the U.S.: On August 21, 2017 (seen as total within a narrow path from Oregon to South Carolina), and on April 8, 2024 (total from Texas to Maine).

Here are some fascinating events to close out the (traditional schedule) school year, and some very striking arrangements of planets, moon and stars to encourage your students to “keep looking up” during the summer months.

June 2012 brings Californians a partial lunar eclipse in the predawn hours on Monday, June 4, and a rare transit of Venus across the face of the Sun on the afternoon of Tuesday, June 5, an event not to happen again for more than a century! Within a week later, and certainly by mid-June, Venus emerges into morning twilight to the lower left of Jupiter. Venus then displays a thin crescent phase, filling out to half full by mid-August while its disk size shrinks as the planet recedes from Earth. Venus will reach peak brilliance in predawn skies in mid-July. In late June and early July, Venus and Jupiter form a brilliant pairing before dawn, an encore of their evening pairing in March. Mars-Saturn remain in the evening sky, the gap between them closing until their trio with Spica in August.

Partial lunar eclipse in predawn on Monday, June 4: moon enters the umbra, or dark central core of Earth’s shadow, around 3:00 a.m. PDT; greatest eclipse (magnitude 37 percent, or 3/8 of the moon’s diameter in dark shadow) occurs at 4:03 a.m. PDT, with moon low in SW, above Antares, heart of the Scorpion. The moon leaves the umbra at 5:06 a.m. PDT. Of all the contiguous 48 states, California has the best view of this eclipse.

On Tuesday, June 5, the transit of Venus will be the last one until December 10, 2117. It begins in the afternoon, at 3:06 p.m. PDT along the U.S. West Coast. The event opens with a ~ 17.6-minute ingress until about 3:23 p.m., as Venus’ disk, 1/32 of the Sun’s apparent diameter, slides onto the solar limb. Venus takes about 6 hours to reach the opposite limb, so for most of North America the transit is still in progress at sunset. For details, including history, safe methods of observing, maps and timetables of visibility, visit: 





I plan to have students observe the start of the transit near the close of the school day at Cahuilla Elementary School in Palm Springs, and then visit other locations in the Coachella Valley until the Sun drops below the mountains. Peter A’Hearn, K-12 Science Specialist for Palm Springs Unified School District, plans to host a continuous transit watch in a park adjacent to Vista del Monte Elementary School. We will use solar filters suitable for safe viewing of solar eclipses with unaided eye, and telescopes fitted with front aperture filters for safely viewing the Sun in detail.

The Moon and Planets in June 2012

Morning planets: Jupiter rises in ENE in midtwilight (when Sun is 9° below the horizon) by June 5, and Venus by June 17. These two planets will form a spectacular pair within 5° in late June and early July. Follow Venus until sunrise and observe its crescent, one percent full on June 11, to 5 percent on June 18, and 16 percent on June 30. The planet’s disk, nearly one arcminute (1/60 of a degree) across during transit on June 5, is still 3/4 arcminute across on June 30, enough for 7-power binoculars to resolve the crescent in bright twilight or in daylight.

Mercury, passing superior conjunction May 27 and perihelion May 29, emerges quickly and brightly into WNW, setting after midtwilight by June 4. Binoculars help spot it in bright twilight first few days. Mercury shines at magnitude –1.5 on June 2, then fades, to –1.0 on June 7, –0.5 on June 14, 0.0 on June 22-23, +0.5 on July 1, and +1.0 on July 8.  Mercury passes Venus on June 1, Pollux on June 20, and closely aligns with the Gemini Twins Castor and Pollux on June 23 and 24.

Saturn, shining at mag. +0.5 to +0.7, drifts through S and SSW at dusk in course of June, staying within 5° of +1.0-mag. Spica. (Saturn ends retrograde June 25.) Through a telescope, rings reach a temporary minimum of 12.5° from edgewise, owing to motion of Earth around Sun. In the longer term, as Saturn orbits the Sun, the rings will “max out” at 27° from edgewise in 2017.

Mars in June fades from mag. +0.5 to +0.9 in SW to WSW at dusk, while shifting east 0.4° to 0.5° daily against stars of Leo-Virgo. On June 25-26, Mars is midway between Regulus and Saturn, 26°-27° from each. On Aug. 13-14, Mars will pass between Saturn and Spica, forming a striking compact, nearly straight-line trio in the WSW at dusk. In surrounding days, from August 7 to 20, the three objects will form a triangle no more than 5° on a side.

Moon near planets, June through August

Sun. June 17 at dawn: Waning crescent old moon low in ENE, between Jupiter to its upper right, and Venus rising to its lower left.

Thurs. June 21 at dusk: First easy waxing crescent young moon low in WNW. To moon’s upper right, locate Mercury, Pollux, and Castor.

Mon. & Tues. June 25 and 26 at nightfall: moon near Mars. Moon passes First Quarter phase (half full and 90° or one-quarter circle east of Sun) on June 26.

Wed. & Thurs. June 27 and 28 at nightfall: Waxing gibbous moon near Saturn and Spica. Saturn is the higher and brighter of the two “stars” near the moon.

Sun. July 15, about 1-1/2 hours before sunrise: Spectacular gathering of waning crescent moon, Venus, Jupiter, the star Aldebaran, and the Hyades star cluster, with the Pleiades or Seven Sisters star cluster not far above. Wonderful views for unaided eye and binoculars.

Mon.-Wed. July 23-25 at nightfall: Fat waxing crescent moon, approaching First Quarter phase, slips past Mars, Saturn, and Spica. On the middle date, Saturn-Spica are 4.5° apart, with Mars 12° to their west (lower right), forming a nearly isosceles triangle.

Sat. August 11, about 1-1/2 hours before sunrise: moon near Jupiter, Aldebaran, and the Hyades. The waning crescent moon will interfere little with the peak of the Perseid meteor shower in the predawn hours of Sunday.

Mon. August 13, about 1-1/2 hours before sunrise: moon near Venus. A perfect day for using the moon to follow Venus long into daylight hours! The moon will occult Venus between 1 p.m. and 2 p.m. PDT from West Coast. For a map and timetable of disappearance and reappearance of Venus, go to www.lunar-occultations.com/iota/planets/0813venus.htm.

Wed. August 15, about one hour before sunrise: Mercury very low in ENE, to lower left of old crescent moon. On Thursday, look about 45 minutes before sunrise to catch an even older crescent moon rising to lower right of Mercury.

Tues. August 21, one hour after sunset: Waxing crescent moon about 4-1/2 days after New, is low in WSW below a compact triangle of Saturn, Mars, and Spica. Four bodies within a 6.5° field! Can you fit all four within the field of view of 7-power binoculars?

Robert C. Victor was Staff Astronomer at Abrams Planetarium, Michigan State University. He is now retired and enjoys providing skywatching opportunities for school children in and around Palm Springs.


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Written by Robert Victor

Robert Victor

Robert C. Victor was Staff Astronomer at Abrams Planetarium, Michigan State University. He is now retired and enjoys providing skywatching opportunities for school children in and around Palm Springs, CA. Robert is a member of CSTA.

One Response

  1. Thanks for keeping us up to date on the celestial occurrences. I am looking forward to looking at the transit this afternoon.

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California Science Test Academy for Educators

Posted: Thursday, February 15th, 2018

California Science Test Academy for Educators

To support implementation of the California Science Test (CAST), the California Department of Education is partnering with Educational Testing Service and WestEd to offer a one-day CAST Academy for local educational agency (LEA) science educators, to be presented at three locations in California from 8:30 a.m. to 3:30 p.m. As an alternative to traveling, LEA teams can participate virtually via WebEx on one of the dates listed below.

The dates and locations for the CAST Academy are as follows:

  • Monday, April 23, 2018—Sacramento
  • Wednesday, April 25, 2018—Fresno
  • Thursday, April 26, 2018—Irvine

The CAST Academy will help participants develop a deeper understanding of the assessment design and expectations of the CAST. The academy also will provide information and activities designed to assist educators in their implementation of the California Next Generation Science Standards and three-dimensional learning to help them gain an understanding of how these new science assessment item types can inform teaching and learning. The CAST Academy dates above are intended for school and district science instructional leaders, including teacher leaders, teacher trainers, and instructional coaches. Additional trainings will be offered at a later date specifically for county staff. In addition, curriculum, professional development, and assessment leaders would benefit from this training.

A $100 registration fee will be charged for each person attending the in-person training. Each virtual team participating via WebEx will be charged $100 for up to 10 participants through one access point. Each workshop will have the capacity to accommodate a maximum of 50 virtual teams. Each virtual team will need to designate a lead, who is responsible for organizing the group locally. Registration and payment must be completed online at http://www.cvent.com/d/6tqg8k.

For more information regarding the CAST Academy, please contact Elizabeth Dilke, Program Coordinator, Educational Testing Service, by phone at 916-403-2407 or by e‑mail at caasppworkshops@ets.org.

Written by California Science Teachers Association

California Science Teachers Association

CSTA represents science educators statewide—in every science discipline at every grade level, Kindergarten through University.

Accelerating into NGSS – A Statewide Rollout Series Now Accepting Registrations

Posted: Friday, January 19th, 2018

Are you feeling behind on the implementation of NGSS? Then Accelerating into NGSS – the Statewide Rollout event – is right for you!

If you have not experienced Phases 1-4 of the Statewide Rollout, or are feeling behind with the implementation of NGSS, the Accelerating Into NGSS Statewide Rollout will provide you with the greatest hits from Phases 1-4!

Accelerating Into NGSS Statewide Rollout is a two-day training geared toward grade K-12 academic coaches, administrators, curriculum leads, and teacher leaders. Check-in for the two-day rollout begins at 7:30 a.m., followed by a continental breakfast. Sessions run from 8:00 a.m. to 4:15 p.m. on Day One and from 8:00 a.m. to 3:30 p.m. on Day Two.

Cost of training is $250 per attendee. Fee includes all materials, continental breakfast, and lunch on both days. It is recommended that districts send teams of four to six, which include at least one administrator. Payment can be made by check or credit card. If paying by check, registration is NOT complete until payment has been received. All payments must be received prior to the Rollout location date you are attending. Paying by credit card secures your seat at time of registration. No purchase orders accepted. No participant cancellation refunds.

For questions or more information, please contact Amy Kennedy at akennedy@sjcoe.net or (209) 468-9027.



MARCH 28-29, 2018
Host: San Mateo County Office of Education
Location: San Mateo County Office of Education, Redwood City

APRIL 10-11, 2018
Host: Orange County Office of Education
Location: Brandman University, Irvine

MAY 1-2, 2018
Host: Tulare County Office of Education
Location: Tulare County Office of Education, Visalia

MAY 3-4, 2018
Host: San Bernardino Superintendent of Schools
Location: West End Educational Service Center, Rancho Cucamonga

MAY 7-8, 2018
Host: Sacramento County Office of Education
Location: Sacramento County Office of Education Conference Center and David P. Meaney Education Center, Mather

JUNE 14-15, 2018
Host: Imperial County Office of Education
Location: Imperial Valley College, Imperial

Presented by the California Department of Education, California County Superintendents Educational Services Association/County Offices of Education, K-12 Alliance @WestEd, California Science Project, and the California Science Teachers Association.

Written by California Science Teachers Association

California Science Teachers Association

CSTA represents science educators statewide—in every science discipline at every grade level, Kindergarten through University.

The Teaching and Learning Collaborative, Reflections from an Administrator

Posted: Friday, January 19th, 2018

by Kelly Patchen

My name is Mrs. Kelly Patchen, and I am proud to be an elementary assistant principal working in the Tracy Unified School District (TUSD) at Louis Bohn and McKinley Elementary Schools. Each of the schools I support are Title I K-5 schools with about 450 students, a diverse student population, a high percentage of English Language Learners, and students living in poverty. We’re also lucky to be part of the CA NGSS K-8 Early Implementation Initiative with the K-12 Alliance. Learn More…

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Written by NGSS Early Implementer

NGSS Early Implementer

In 2015 CSTA began to publish a series of articles written by teachers participating in the California NGSS k-8 Early Implementation Initiative. This article was written by an educator(s) participating in the initiative. CSTA thanks them for their contributions and for sharing their experience with the science teaching community.

2018 CSTA Conference Call for Proposals

Posted: Wednesday, January 17th, 2018

CSTA is pleased to announce that we are now accepting proposals for 90-minute workshops and three- and six-hour short courses for the 2018 California Science Education Conference. Workshops and short courses make up the bulk of the content and professional learning opportunities available at the conference. In recognition of their contribution, members who present a workshop or short course receive 50% off of their registration fees. Click for more information regarding proposals, or submit one today by following the links below.

Short Course Proposal

Workshop Proposal Learn More…

Written by California Science Teachers Association

California Science Teachers Association

CSTA represents science educators statewide—in every science discipline at every grade level, Kindergarten through University.

CSTA’s New Administrator Facebook Group Page

Posted: Monday, January 15th, 2018

by Holly Steele

The California Science Teachers Association’s mission is to promote high-quality science education, and one of the best practice’s we use to fulfill that mission is through the use of our Facebook group pages. CSTA hosts several closed and moderated Facebook group pages for specific grade levels, (Elementary, Middle, and High School), pages for district coaches and science education faculty, and the official CSTA Facebook page. These pages serve as an online resource for teachers and coaches to exchange teaching methods, materials, staying update on science events in California and asking questions. CSTA is happy to announce the creation of a 6th group page called, California Administrators Supporting Science. Learn More…

Written by Guest Contributor

From time to time CSTA receives contributions from guest contributors. The opinions and views expressed by these contributors are not necessarily those of CSTA. By publishing these articles CSTA does not make any endorsements or statements of support of the author or their contribution, either explicit or implicit. All links to outside sources are subject to CSTA’s Disclaimer Policy: http://www.classroomscience.org/disclaimer.