
McDonald Observatory
The Large New Observatory in Western Texas Was Made Possible by an Amateur, An Admirable Site, An Efficient Housing and a High-grade Telescope

McDonald Observatory
The Large New Observatory in Western Texas Was Made Possible by an Amateur, An Admirable Site, An Efficient Housing and a High-grade Telescope

What Keeps the Stars Shining?
According to Bethe's Theory, the Most Notable Achievement of Theoretical Astrophysics of the Last Fifteen Years, It is Atomic Transfortations

What Keeps the Stars Shining?
For the Source of Stellar Energy We Must Look To Reactions Between Charged Atomic Nuclei, Discussions and Background for Bethe's Theory

Inside the Stars
Why do the Stars Shine, How do re Know They Are So Exceedingly Hot inside, and What Makes them So ? From Whence Coles their Vast Store of Energy?...

Berenice's Hair
Recent Research Proves That This Nearby Cluster of Stars Is No Mere Accidental Conglomeration of Unrelated Bodies but Is an Interrelated System

As Astronomers Meet
Among Themselves Astronomers Specialize On a Wide Variety of Problems, and Then Meet Twice Yearly to Tell Each Other About Their Researches

Sodium Skies
Recent Research Indicates that a Large Part of the Illumination We Commonly Designate as Starlight Originates in the Earth's Upper Atmosphere

The Image-Slicer
A New Apparatus Used with the Spectroscope Cuts Star-Images into Sections, Rearranges these End to End, and Multiplies the Efficiency Very Greatly

Inside the Great Planets
There is Evidence that Matter Within SOle of the Greater Planets Exists in Forms and Conditions that Would Seem Bizarre to Dwellers on Our Earth

Artificial Eclipses
At Their Triennial Meeting the World's Astronomers Witnessed the Amazing New Technique of Observing Solar Prominences and Corona Without an Eclipse

Alpha Ursae Majoris
Recent Research on the Binary Star at the Lip of the Great Dipper Reveals the Orbits of Its Components and Rounds Out Our Understanding of It

How Hot is the Sun?
It Has No Single Temperature hut the Layer that Sends Us its Light Directly Averages About 5740 Degrees, Absolute, or 9873 Degrees, Fahrenheit

Diffuse Nebulae
The New Struve Wide-Slit Spectrograph Permits the Observation of the Faint Galactic Nebulae

The Coolest Stars
Results of the Recent Successful Search for Faint Exceptionally Red and Infra-red Dwarf Stars, How The Temperatures of Such Stars are Ascertained

Some Astronomical Finds
The Best Fish are Not Always Caught by the Best Equipped Fishermen, The Little Fellow With a Small Telescope Makes Finds of Unusual Interest

A Great Work Completed
The Monumental New General Catalog of Stars for the Professional Astronomer, in Preparation More than 30 Years, is Finished, An Enormous Task....

The Odd New-Old Star
The Much-Talked-of Huge Star in Auriga Yields to Astrophysical Interpretation: an Eclipsing Binary With an Almost Grazing Type of Eclipse

New Astronomical Advances, March 1938
A Résumé of Some of the Researches Described at the Most Recent Semi-Annual Meeting of the 400 Astronomers of the North American Continent

Pulsating Stars
When Stars Pulsate in Brightness, What Really Happens and Why? Such Changes Take Place on an Enormous Scale, A Star's Diameter May Rise and Fall by as Much as 40,000,000 Miles and at a Rate of 25 Miles a Second, New Data Increase Our Knowledge but We Still Have Much to Learn

The Nearest Stars

The Rotation of Our Galaxy
New Research Based on Planetary Nebulae Provides the Most Striking Evidence and the Best Picture of Galactic Rotation Thus Far Made Available

Radiation Pressure
How the Sun and the Stars, Due to the Pressure of Their Light, Ultimately Clean Up the Smaller Particles in Their Own Immediate Neighborhoods

As Others Would See Us
Just as Mars, when Seen from the Earth, is Called the "Ruddy" Planet, so the Earth from Mars or Other Planets Would be Called the Azure Object

The New Martian Puzzle
Mars' Current Apparition Reveals to Astronomers a Remarkable Phenomenon, Unprecedented Clearing in the Planet's Atmosphere, Signifying What?