Contained in the June 2019 Challenge
Confounding Cosmology, Testing the (Dawes) Restrict, and Spying Spirals Within the June situation of Sky & Telescope, delve into the newest controversies of cosmology: Why do not astronomers agree on the present growth fee of the universe? And the way nicely will we perceive Sort Ia supernovae, the white dwarf detonations that underlie astronomers’ concepts
Confounding Cosmology, Testing the (Dawes) Restrict, and Spying Spirals
Within the June situation of Sky & Telescope, delve into the newest controversies of cosmology: Why do not astronomers agree on the present growth fee of the universe? And the way nicely will we perceive Sort Ia supernovae, the white dwarf detonations that underlie astronomers’ concepts about darkish vitality? After considering the boundaries of the universe, think about a restrict nearer to residence: the Dawes restrict, which mixes a telescope’s decision with your individual visible acuity. A reader places this much-debated restrict to a private take a look at. Contributing Editor Ted Forte hunts his personal elusive prey amongst a number of grand spiral galaxies in our neighborhood which can be nicely positioned for June observing. We offer info on Jupiter, which reaches opposition on June 10th — a major time to view a seasonal change taking place on the large planet, as described by Thomas Dobbins. And do not miss Sue French’s final Deep Sky Wonders column!
Artist’s illustration of two competing explanations of Sort Ia supernovae.
NASA / CXC / SAO and GSFC / D. Berry
Lighting a Cosmic Fuse
“Commonplace candle” Sort Ia supernovae should not as uniform as astronomers as soon as thought they had been.
By Shannon Corridor
Astronomers and cosmologists cannot agree on the present growth fee of the universe.
By Govert Schilling
Looking Elusive Prey
Face-on spiral galaxies are among the many most stunning objects to behold.
By Ted Forte
The Dawes Restrict and Past
The writer finds that two of his telescopes have decrease limits than what concept predicts.
By Don Ferguson
Seeing Stars in Glacier
The primary cross-border Worldwide Darkish Sky Park affords every part you want for a satisfying evening beneath the celebrities.
By Amy Grisak
The Quest for Spherical Stars
Nice deep-sky imaging begins with well-tracked exposures.
By Ron Brecher
Past the Printed Web page
Uranus and 5 of its moons
Observe the Ice Giants
Take an early crack at Neptune and Uranus with our finder charts. In June, each planets are greatest considered throughout morning twilight.
Crater Controversy: The Full Story
Learn the total story behind the existence — or lack thereof — of small, kilometer-size objects within the Kuiper Belt.
Volunteer for Glacier Nationwide Park
Glacier Nationwide Park’s astronomy applications run on the facility of volunteers — which may imply you!
ALSO IN THIS ISSUE
All 5 shiny planets are on show this month — 4 accompany us throughout the night hours, and one greets us at daybreak.
By Fred Schaaf
Jupiter Goes Massive
Jupiter reaches opposition on June 10th, when it is going to be simply noticed with bare eye from nightfall til daybreak.
By S. N. Johnson-Roehr
Outdated Wine in New Bottles
A recurring change in Jupiter’s Equatorial Zone brings coloration to the historic report.
By Thomas A. Dobbins
No NGC Clusters
Look past the pages of the traditional catalog to seek out these star clusters.
By Sue French
Desk of Contents
See what else June’s situation has to supply.