Sky and Telescope - January 2017 - 34

Innovative Astronomy Gear

5

MEADE ETX90 OBSERVER
Meade meade.com

In 1996 Meade set a new standard for serious, entry-level
telescopes when it introduced its ETX90, and the company
upped the bar three years later when Go To technology
was added to the 90-mm Maksutov-Cassegrain telescope.
Now this venerable instrument has been redesigned and
introduced as the ETX90 Observer with AudioStar, a hand
controller that provides more than 4 hours of recorded commentary on the sky's most interesting celestial sights. The
optical tube is easily detached from the mount, increasing
the versatility of both components. If you yearn for more
aperture, there's also a brand new ETX125 Observer ($699)
featuring a 127-mm Maksutov-Cassegrain telescope.
* U.S. price: $499

6

5

CELESTRON POWERTANK LITHIUM
Celestron celestron.com

Modern electronics ended the days when powering telescopes in the field meant dragging along heavy automobile
batteries and bulky power converters. But even by today's
standards, Celestron's PowerTank Lithium battery offers a
new level of convenience and performance. Based on lithium
iron phosphate (LiFePO4) chemistry, the battery has exception shelf life and up to 2,000 recharging cycles. In addition
to the standard 12-VDC output, there are two USB charging
ports for smartphones and tablets. And did we mention its
light panel with multi-level red and white illumination?
* U.S. price: $139.95

7

6

DAYSTAR COMBO QUARK
DayStar Filters daystarfi lters.com

This year's upcoming total solar eclipse on August 21st has
lots of amateurs thinking about observing the Sun, especially at hydrogen-alpha wavelengths where our star puts
on dramatic shows almost daily. The easy-to-use Combo
Quark from DayStar Filters will turn virtually any telescope
with an f/15 or slower focal ratio (either the scope's native
focal ratio or one achieved by stopping down the aperture)
into a high-quality hydrogen-alpha setup for visual use and
photography. The unit fits 1¼-inch focusers, accepts 1¼inch eyepieces, and is powered by an AC adapter.
* U.S. price: $995

8

UNIVERSE2GO PERSONAL
PLANETARIUM
Universe2go universe2go.com

Coupled with your Apple or Android smartphone and a free
planetarium app, this lightweight, handheld viewer offers
an interactive, augmented-reality view of the night sky that
lets you easily identify stars, planets, constellations, and
hundreds of deep-sky objects, many of which have accompanying audio descriptions. Placed inside the viewer, your
phone shows a planetarium screen overlaid onto your direct
view of the sky. The screen is automatically oriented to
where you are looking and updates as you sweep the sky.
The website lists currently compatible smartphones.
* U.S. price: $99

34

7

J A N U A R Y 2 0 1 7 * SK Y & TELESCOPE

8


http://www.meade.com http://www.celestron.com http://www.lters.com http://www.universe2go.com

Sky and Telescope - January 2017

Table of Contents for the Digital Edition of Sky and Telescope - January 2017

Contents
Sky and Telescope - January 2017 - Cover1
Sky and Telescope - January 2017 - Cover2
Sky and Telescope - January 2017 - 1
Sky and Telescope - January 2017 - Contents
Sky and Telescope - January 2017 - 3
Sky and Telescope - January 2017 - 4
Sky and Telescope - January 2017 - 5
Sky and Telescope - January 2017 - 6
Sky and Telescope - January 2017 - 7
Sky and Telescope - January 2017 - 8
Sky and Telescope - January 2017 - 9
Sky and Telescope - January 2017 - 10
Sky and Telescope - January 2017 - 11
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Sky and Telescope - January 2017 - Cover3
Sky and Telescope - January 2017 - Cover4
Sky and Telescope - January 2017 - SGA17RAL
Sky and Telescope - January 2017 - 90
Sky and Telescope - January 2017 - SGA17R
Sky and Telescope - January 2017 - SGA17RA
Sky and Telescope - January 2017 - SGA17EAL
Sky and Telescope - January 2017 - 94
Sky and Telescope - January 2017 - SGA17E
Sky and Telescope - January 2017 - SGA17EA
Sky and Telescope - January 2017 - SGA17SAL
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Sky and Telescope - January 2017 - SGA17S
Sky and Telescope - January 2017 - SGA17SA
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