Beginners Astronomy
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Transcript of Beginners Astronomy
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BEGINNERS ASTRONOMY
Martin Crow Crayford Manor House Astronomical Society
Lunar and Solar Observing
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Last time
Martin Crow Crayford Manor House Astronomical Society
Meteor watch:
Visually observing variable stars
Visual observation
What are meteors
Imaging meteors
A look at setting up and using telescopes
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This week:
Martin Crow Crayford Manor House Astronomical Society
Lunar observing using a telescope:
Using charts / maps of the Moon
Things to look out for
Grazing occultations
Drawing / sketching
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This week:
Martin Crow Crayford Manor House Astronomical Society
Safe Solar observing using binoculars and a telescope:
Do’s and don’ts
Ways to observe safely
What to see in white light
Other ways to view the Sun
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Observing the Moon
Martin Crow Crayford Manor House Astronomical Society
Observing the Moon visually and optically
What you will see and what you can do.
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Visually
Most obvious are the phases of the Moon
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Martin Crow Crayford Manor House Astronomical Society
Phase Northern Hemisphere Visibility Standard time of culmination (mid-phase) New moon Not visible, traditionally Moon's first visible crescent after sunset 12 noon
Waxing crescent moon Right 1–49% visible afternoon and post-dusk 3 pm First quarter moon Right 50% visible afternoon and early night 6 pm Waxing gibbous moon Right 51–99% visible late afternoon and most of night 9 pm Full moon Fully visible sunset to sunrise (all night) 12 midnight Waning gibbous moon Left 51–99% visible most of night and early morning 3 am
Third quarter moon Left 50% visible late night and morning 6 am
Waning crescent moon Left 1–49% visible pre-dawn and morning 9 am
Dark moon Not visible, traditionally Moon's last visible crescent before sunrise 12 noon
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Martin Crow Crayford Manor House Astronomical Society
Lunar phases
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Martin Crow Crayford Manor House Astronomical Society
Visually contd.
Lunar eclipses
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Martin Crow Crayford Manor House Astronomical Society
Occultations
Jim Burchell
Jim Burchell
Visually contd.
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Observing the Moon
Martin Crow Crayford Manor House Astronomical Society
Use an atlas or map to find your way aroundOptically
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Observing the Moon
Martin Crow Crayford Manor House Astronomical Society
What to look out for
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Martin Crow Crayford Manor House Astronomical Society
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Observing the Moon
Martin Crow Crayford Manor House Astronomical Society
Grazing occultations of stars
Optically contd.
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Martin Crow Crayford Manor House Astronomical Society
On a similar note - Asteroid occulting a background star
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Martin Crow Crayford Manor House Astronomical Society
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Observing the Moon
Martin Crow Crayford Manor House Astronomical Society
Occultation of Saturn
Images by Jim Burchell
Optically contd.
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Observing the Moon
Martin Crow Crayford Manor House Astronomical Society
Draw / sketch what you see
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Safe Solar observing
Martin Crow Crayford Manor House Astronomical Society
Do’s and Don'ts
Never look directly at the Sun
Never leave equipment pointed at the Sun unattended without coveringthe object glass / telescope front.
Never use eye piece solar filters
Never look directly at the Sun through unfiltered binocularsand telescopes
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Safe Solar observing
Martin Crow Crayford Manor House Astronomical Society
How to observe the Sun safely
Image projection
This is by far the cheapest and easiest of the safe methods.
This image can be just viewed and shared by a group of people.
It can be drawn.
Or you can take a picture of it.
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Safe Solar observing
Martin Crow Crayford Manor House Astronomical Society
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Safe Solar observing
Martin Crow Crayford Manor House Astronomical Society
Solar filters for the front end of the telescope: There are two types:
1. Reflective film – Baader astro solar
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Safe Solar observing
Martin Crow Crayford Manor House Astronomical Society
2. Reflective coated glass filters – Thousand oaks
Solar filters for the front end of the telescope: There are two types:
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Safe Solar observing
Martin Crow Crayford Manor House Astronomical Society
Solar filters for the rear end of the telescope:
Herschel wedge
This allows safe viewing of the sun full spectrum in white light.
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Safe Solar observing
Martin Crow Crayford Manor House Astronomical Society
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Safe Solar observing
Martin Crow Crayford Manor House Astronomical Society
Basic solar observing Working out the Sun spot number
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Martin Crow Crayford Manor House Astronomical Society
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Safe Solar observing
Martin Crow Crayford Manor House Astronomical Society
Solar filters for the rear end of the telescope:
Hydrogen Alpha dedicated telescopes
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Safe Solar observing
Martin Crow Crayford Manor House Astronomical Society
Drawing by Honor Wheeler
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Safe Solar observing
Martin Crow Crayford Manor House Astronomical Society
Images by Honor Wheeler
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Safe Solar observing
Martin Crow Crayford Manor House Astronomical Society
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Safe Solar observing
Martin Crow Crayford Manor House Astronomical Society
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Martin Crow Crayford Manor House Astronomical Society
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Martin Crow Crayford Manor House Astronomical Society
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Martin Crow Crayford Manor House Astronomical Society
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