Green Bank Star Quest   Intro to Astrosketching (revised)
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Green Bank Star Quest Intro to Astrosketching (revised)

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Intoduction to astrosketching including history, examples of current work, examples of techniques and media, and resources lists. Ends with images to use in a hands on workshop.

Intoduction to astrosketching including history, examples of current work, examples of techniques and media, and resources lists. Ends with images to use in a hands on workshop.

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Green Bank Star Quest   Intro to Astrosketching (revised) Green Bank Star Quest Intro to Astrosketching (revised) Presentation Transcript

  • Astro Sketching Workshop
    Green Bank Star Quest 8
    Presented by
    Michael Rosolina
  • To improve your observing skills
    To create a visual record
    To exercise your creativity
    Why Sketch?
  • Historical Background
    These are just a few of the many past astronomers who were keen observers
    and who sketched their observations:
    Galileo
    Huygens
    Maraldi
    W.C. Bond & G.P. Bond
    Antoniadi
    Dawes
    Barnard
  • Galileo
    Galileo was one of the first telescopic observers to draw (and publish) what he saw.
    Source: Galileo Project/Al Van Helden
  • Galileo
    Galileo published his
    observations of Jupiter and
    its moons in SideriusNuncius,
    The Starry Messenger (1610).
    This is an excerpt from his journal.
    Source: Galileo Project/Al Van Helden
  • Galileo
    Galileo and his protégé
    Castelli developed solar
    projection to accurately
    observe and record
    sunspots . Through a
    sequence of solar
    observations, Galileo
    demonstrated the
    rotation of the Sun.
    Source: Galileo Project/Al Van Helden
  • Huygens
    Another pioneer in the mid-17th century
    was Christiaan Huygens , who made these
    observations of Mars
    Source: The Exploration of Mars
    By Werner von Braun & ChesleyBonestell
  • Maraldi
    From 1672 to 1719, Maraldi made
    many observations of Mars and
    made careful measurements of the
    polar ice cap.
    Source: The Exploration of Mars
    By Werner von Braun & ChesleyBonestell
  • Antoniadi
    By the 19th and early 20th century, improved telescopes were allowing skilled observers to make even more detailed sketches of celestial objects.
    Source: The Planet Mars by William Sheehan
  • From Galileo’s early drawings…
    Courtesy NASA/JPL-Caltech
  • Through the legendary observers of the past,
    to present day amateur astronomers…
    Phases of Venus
    Courtesy NASA/JPL-Caltech
  • Astro sketching continues to thrive…
    Courtesy Sol Robbins
  • Sinus Iridum
    25July 2007
    12” SCT @ 271x
    Courtesy Rich Handy
  • The Sun in
    Hydrogen Alpha
    Courtesy Erika Rix
  • Double Stars
    Courtesy Eric Graff
  • Star Clusters
    M44
    The Beehive
    102mm Refractor
    Mag: 12.5x & 30x
    Courtesy Rony De Laet
  • Globular Clusters
    Courtesy Frank McCabe
  • Galaxies
    Courtesy Jeff Young
  • Meteor
    Showers
    Courtesy of RoelWeijenberg
  • What makes a good astro sketch?
    • Record what you see—not what you would like to see
    • Include information such as instrument used, magnification, and field of view (FOV)
    • Include time and date (UT), cardinal directions, seeing, transparency, altitude of object, and any other relevant information
    • Add any other notes you feel are pertinent to your observation
  • Where do I begin? What should I draw?
    Draw what you like to observe—what interests you.
    There are as many different astro sketches as there are visible objects in the sky.
  • Planets
  • Mars
    Courtesy Sol Robbins
  • Mars
    19 Dec. 2007
    0430-0500 UT
    10” Reflector
    Mag: 360x
    S: Antoniadi II
    Courtesy Frank McCabe
  • Jupiter
    Courtesy Sol Robbins
  • Jupiter with
    Phenomenon
  • Courtesy Jeff Young
  • Venus
    Courtesy Sol Robbins
  • 2010 Apparition
    of Jupiter
    Courtesy of
    Jef De Wit
  • The Sun
  • Courtesy Erika Rix
  • Courtesy Jeff Young
  • Courtesy of RoelWeijenberg
  • Courtesy Ralph Marantino
  • The Sun in
    Ha and WL
    June 17, 2011
    8cm refractor @60x
    4cm PST @ 40x
    Courtesy of UwePilz
  • The Moon
  • Gassendi
    3 Sept. 2006
    12” SCT @ 244x
    Courtesy Rich Handy
  • Waning Gibbous Moon 28 DEC. 2008
    200mm Reflector @ 48x
    Courtesy Deirdre Kelleghan
  • Petavius 29 May 2009
    10” Reflector @ 241x & 362x
    Courtesy Frank McCabe
  • Lunar Eclipse
    21 Feb.2008
    108mm Reflector
    Mag: 21x
    Courtesy Frank McCabe
  • Deep Sky Objects
  • Courtesy Eric Graff
  • Courtesy Jeff Young
  • M31
    28 Sept. 2008
    15x70 Binoculars
    FOV: 4.4 deg.
    Courtesy Rony De Laet
  • Courtesy Eric Graff
  • IC4665
    Summer Beehive
    15 Sept. 2007
    102mm Refractor
    Mag: 16x FOV: 150’
    Courtesy Rony De Laet
  • Asteroids
    and
    Comets
  • C/17P Holmes
    03 Nov. 2007
    102mm Refractor
    Mag: 16x & 20x
    FOV: 150’
    Courtesy Rony De Laet
  • Courtesy Jeff Young
  • Occultations
    Conjunctions
    And
    Transits
  • Occultation of Venus
    01 Dec. 2008 LX 90 @ 57x
    Courtesy Deirdre Kelleghan
  • Saturn and Porrima
    May 28, 2011
    8cm refractor @ 120x
    Courtesy of UwePilz
  • Sketch by M Rosolina
  • What do I use to make my sketch?
  • Basic Tools for Sketching
    • drawing pencils, pens, color pencils, Conte’ crayon, charcoal, pastels, chalk
    • sketching paper, copy paper, black paper, color paper, textured paper, waterproof paper
    • templates, blending stumps, erasers, eraser shield, sharpener
    • clipboard, red light, white light, table, chair
  • What effects can be achieved
    by the use of different media?
  • Graphite pencil
    on smooth white copy paper
    Courtesy Sol Robbins
  • Graphite pencil on white sketch
    paper
    Last Quarter Moon
    18 March 2009
    15x70 Binoculars
    Courtesy Deirdre Kelleghan
  • Graphite pencil
    on white paper
    inverted digitally
    Courtesy Jeff Young
  • Graphite pencil and
    color pencil on white
    sketch paper
  • Color Chalk on
    textured white paper
    The Sun in Ha
    10 DEC. 2005
    40mm PST @ 33x
    Courtesy Erika Rix
  • Color pen on
    white paper
    Courtesy Ralph Marantino
  • Remember…
    record what
    you see!
    Courtesy Ralph Marantino
  • White Conte’ crayon,
    Conte’ pencil, and
    watercolor pencil on
    black paper
    Courtesy Erika Rix
  • White Conte’ crayon
    on textured color paper
  • Pastels on
    Black paper
    Total Lunar Eclipse
    The Netherlands
    June 15, 2011
    Courtesy RoelWeijenberg
  • Computer processing is a relatively new tool that can be used very effectively to enhance and even create astro sketches.
    Digitizing your work allows you to present and share it with the global community of amateur astronomers.
  • You can
    add text…
    Courtesy Eric Graff
  • You can
    add color…
  • You can invert…
    Comet C/17P Holmes
    04 Nov. 2007
    Courtesy Sol Robbins
  • You can add text to field sketches and make a collage of sequences…
    Courtesy Erika Rix
  • You can even make an animation…
    Solar Prominence
    Courtesy Erika Rix
  • … or draw the
    sketch with
    the computer…
    Alpha Persei Assoc.
    (Mel 20)
    ETX 70 @ 9x
    FOV: 4.8 deg.
    Digital drawing based on a raw pencil field sketch
    Courtesy Rony De Laet
  • M51 & SN2011dh
    16” reflector @
    75x-225x
    Digital drawing
    Courtesy of IVM
  • What does making a sketch look like?
    Here is a step-by-step tutorial.
    Let’s start with a lunar target.
  • First, anchor the sketch by outlining
    distinguishing features…
    Courtesy Erika Rix
  • Then add shadows…
    Courtesy Erika Rix
  • Blend to smooth…
    Courtesy Erika Rix
  • Add more shadows.
    Try to make light
    and dark areas
    instead of drawing
    objects…
    Courtesy Erika Rix
  • Add and blend
    more shadows.
    Use your finger
    and a stump to
    blend…
    Courtesy Erika Rix
  • Apply background
    in layers—use a loaded finger or a loaded stump…
    Courtesy Erika Rix
  • Add material in layers…
    Courtesy Erika Rix
  • Keep adding those layers…
    Courtesy Erika Rix
  • Soften by blending…
    Courtesy Erika Rix
  • Add finishing touches and you’re done…
    Copernicus
    Courtesy Erika Rix
  • We’ve looked at some of the long, rich history of astro sketching.
    We’ve seen some prime examples of sketching at its best.
    We’ve discussed sketching tools and techniques.
    And we’ve learned that sketching not only leaves you with a visual record of your observation…
    But most importantly, it trains your eye and improves your observing skills.
    Now it’s time for a little hands-on practice.
  • Remember, everyone starts somewhere…
    Observing log
    M Rosolina
  • Keep Looking Up!
    Orion
    Sketch Courtesy Frank McCabe
  • Choose one of the following objects to practice your sketching technique…
  • M6
    Courtesy Rony De Laet
  • Courtesy Jeff Young
  • Jupiter
    Courtesy Sol Robbins
  • Saturn
    Saturn
  • Courtesy Jeff Young
  • Graphite drawing pencils, pens, color pencils, Conte’ crayons, charcoal, pastels, chalk
    Sketch paper, copy paper, black paper, color paper,textured paper, waterproof paper
    Template, blending stump, eraser, eraser shield, sharpener
    Clipboard, red light, white light, table, chair
    Sketch Materials and Tools
  • These are some of the many online resources available for tutorials, templares, materials, advice, and companionship:
    Cloudy Nights Sketching Forum
    http://www.cloudynights.com/ubbthreads/postlist.php/Cat/0/Board/Sketching/page/0/view/collapsed/sb/5/o/all
    Astronomy Sketch of the Day
    http://www.asod.info/
    Jeremy Perez’s Belt of Venus
    http://www.perezmedia.net/beltofvenus/
    The Association of Lunar and Planetary Observers (ALPO) templates
    http://alpo-astronomy.org/
    Dick Blick Art Materials
    http://www.dickblick.com
    Astrosketching Resources
  • Copyright 2011 Michael Rosolina
    All contributor images are the
    property of their respective owners
    and are used here with permission