Skip to content

Subscribe today

Every print subscription comes with full digital access

All Topics
- Health
- Humans
- Life
- Earth
- Physics
- Space

Magazine
Menu
About
For Students
Our Store

Donate

Science News

INDEPENDENT JOURNALISM SINCE 1921 SIGN IN

Search

Science News

INDEPENDENT JOURNALISM SINCE 1921

All Topics
- Earth
- Humans
- Life
  - Animals
  - Plants
  - Ecosystems
  - Paleontology
  - Neuroscience
  - Genetics
  - Microbes
- Physics
- Space
- Tech
  - Computing
  - Artificial Intelligence
- Chemistry
- Math
- Science & Society
Health
Humans
- Humans
- - Archaeology
    A puzzling mix of artifacts raises questions about Homo sapiens' travels to China
    
    By Bruce Bower23 hours ago
  - Health & Medicine
    What can period blood reveal about a person’s health?
    
    By Payal DharApril 16, 2024
  - Health & Medicine
    Teens are using an unregulated form of THC. Here’s what we know
    
    By Helen BradshawApril 10, 2024
Life
- Life
  - Animals
  - Plants
  - Ecosystems
  - Paleontology
  - Neuroscience
  - Genetics
  - Microbes
- - Neuroscience
    Tiny treadmills show how fruit flies walk
    
    By Laura SandersApril 17, 2024
  - Animals
    Hibernating bumblebee queens have a superpower: Surviving for days underwater
    
    By Darren IncorvaiaApril 16, 2024
  - Science & Society
    In ‘Get the Picture,’ science helps explore the meaning of art
    
    By Shi En KimApril 16, 2024
Earth
- Earth
- - Earth
    Polar forests may have just solved a solar storm mystery
    
    By Carolyn GramlingApril 9, 2024
  - Space
    During the awe of totality, scientists studied our planet’s reactions
    
    By Adam MannApril 8, 2024
  - Environment
    Heat waves cause more illness and death in U.S. cities with fewer trees
    
    By Jude ColemanApril 8, 2024
Physics
- Physics
- - Physics
    Physicists take a major step toward making a nuclear clock
    
    By Emily ConoverApril 4, 2024
  - Life
    During a total solar eclipse, some colors really pop. Here’s why
    
    By Tina Hesman SaeyApril 1, 2024
  - Physics
    A teeny device can measure subtle shifts in Earth’s gravitational field
    
    By Adam MannMarch 26, 2024
Space
- Space
- - Planetary Science
    Jupiter’s moon Io may have been volcanically active ever since it was born
    
    By Nikk Ogasa1 hour ago
  - Space
    50 years ago, scientists found a lunar rock nearly as old as the moon
    
    By Emily ConoverApril 11, 2024
  - Space
    How a sugar acid crucial for life could have formed in interstellar clouds
    
    By Saugat BolakheApril 11, 2024

Feature

A Tale of Two Cygnuses: Are They Black Holes?

Share this:

Email
Facebook
Twitter
Pinterest
Pocket
Reddit
Print

By Science News

Magazine Issue: Vol. 102 No. #19, November 4, 1972

Having trouble viewing this? Open in a new window

Questions or comments on this article? E-mail us at feedback@sciencenews.org | Reprints FAQ

A version of this article appears in the November 4, 1972 issue of Science News.

We are at a critical time and supporting science journalism is more important than ever. Science News and our parent organization, the Society for Science, need your help to strengthen scientific literacy and ensure that important societal decisions are made with science in mind.

Please subscribe to Science News and add $16 to expand science literacy and understanding.

Related Stories

Planetary Science
Jupiter’s moon Io may have been volcanically active ever since it was born

By Nikk Ogasa1 hour ago
Archaeology
A puzzling mix of artifacts raises questions about Homo sapiens' travels to China

By Bruce Bower23 hours ago
Neuroscience
Tiny treadmills show how fruit flies walk

By Laura SandersApril 17, 2024

Science News

Science News was founded in 1921 as an independent, nonprofit source of accurate information on the latest news of science, medicine and technology. Today, our mission remains the same: to empower people to evaluate the news and the world around them. It is published by the Society for Science, a nonprofit 501(c)(3) membership organization dedicated to public engagement in scientific research and education (EIN 53-0196483).

Science News Explores
Science News Learning

Subscriber Services

Subscribe
Renew
Give a Gift Subscription
Customer Service

Follow Science News on Facebook
Follow Science News on X
Follow Science News via RSS
Follow Science News on Instagram
Follow Science News on YouTube
Follow Science News on TikTok

More Information

FAQ
Newsletters
Rights & Permissions
Advertise
Contact

Society for Science

About the Society
Society Store
Donate
Careers

© Society for Science & the Public 2000–2024. All rights reserved.

1719 N Street, N.W., Washington, D.C. 20036 202.785.2255

Terms of Service Privacy Policy

Log in

Subscribers, enter your e-mail address for full access to the Science News archives and digital editions.

Not a subscriber?
Become one now.

Client key* E-mail Address*