* . *
  • About
  • Advertise
  • Privacy & Policy
  • Contact
Tuesday, September 9, 2025
Earth-News
  • Home
  • Business
  • Entertainment
    Jobs roundup: September 2025 | Blizzard Entertainment appoints Walter Kong SVP of live games/mobile development – GamesIndustry.biz

    Blizzard Entertainment Names Walter Kong as SVP of Live Games and Mobile Development in September 2025 Jobs Update

    Monumental Sports & Entertainment Sets Corporate Direction at Nasdaq – PR Newswire

    Monumental Sports & Entertainment Reveals Bold New Corporate Vision at Nasdaq

    The Secret to What Made ‘CarJack’ Work on As the World Turns – yahoo.com

    The Surprising Secret Behind ‘CarJack’s’ Success on As the World Turns

    Victor Garber on his viral “And Just Like That” toilet scene: ‘I was delighted to be doing something ridiculous’ (exclusive) – yahoo.com

    Victor Garber on his viral “And Just Like That” toilet scene: ‘I was delighted to be doing something ridiculous’ (exclusive) – yahoo.com

    Pendulum Announce Homecoming 2026 Australian Tour – yahoo.com

    Pendulum Announces Thrilling Homecoming Tour Across Australia in 2026

    ITV Studios Launches New Entertainment Label – Global Bulletin – IMDb

    ITV Studios Unveils Exciting New Entertainment Label

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    ASE Technology (ASX) Hits Record High on AI Fuel – uk.finance.yahoo.com

    ASE Technology Rockets to New Heights Driven by Game-Changing AI Breakthroughs

    Tri-Counties Bank marks 50 years of growth with focus on technology and personal service – thebusinessjournal.com

    Tri-Counties Bank Celebrates 50 Years of Growth Driven by Technology and Personal Service

    AI will reshape internet, create jobs in West Virginia says High Technology Foundation’s Estep – WV News

    How AI Is Set to Transform the Internet and Boost Job Growth in West Virginia

    Industry partner provides Ferris State Plastics Engineering Technology students with state-of-the-art equipment to gain in-demand skills – Ferris State University

    Industry Partner Equips Ferris State Plastics Engineering Students with Cutting-Edge Technology to Boost In-Demand Skills

    Health Technology Ecosystem – Centers for Medicare & Medicaid Services | CMS (.gov)

    Discover the Future of Health Technology: Innovations Revolutionizing Patient Care

    Coherent Joins LLNL’s STARFIRE Diode Technology Working Group to Advance Inertial Fusion Energy – GlobeNewswire

    Coherent Partners with LLNL’s STARFIRE Team to Drive Breakthroughs in Inertial Fusion Energy

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
  • Home
  • Business
  • Entertainment
    Jobs roundup: September 2025 | Blizzard Entertainment appoints Walter Kong SVP of live games/mobile development – GamesIndustry.biz

    Blizzard Entertainment Names Walter Kong as SVP of Live Games and Mobile Development in September 2025 Jobs Update

    Monumental Sports & Entertainment Sets Corporate Direction at Nasdaq – PR Newswire

    Monumental Sports & Entertainment Reveals Bold New Corporate Vision at Nasdaq

    The Secret to What Made ‘CarJack’ Work on As the World Turns – yahoo.com

    The Surprising Secret Behind ‘CarJack’s’ Success on As the World Turns

    Victor Garber on his viral “And Just Like That” toilet scene: ‘I was delighted to be doing something ridiculous’ (exclusive) – yahoo.com

    Victor Garber on his viral “And Just Like That” toilet scene: ‘I was delighted to be doing something ridiculous’ (exclusive) – yahoo.com

    Pendulum Announce Homecoming 2026 Australian Tour – yahoo.com

    Pendulum Announces Thrilling Homecoming Tour Across Australia in 2026

    ITV Studios Launches New Entertainment Label – Global Bulletin – IMDb

    ITV Studios Unveils Exciting New Entertainment Label

  • General
  • Health
  • News

    Cracking the Code: Why China’s Economic Challenges Aren’t Shaking Markets, Unlike America’s” – Bloomberg

    Trump’s Narrow Window to Spread the Truth About Harris

    Trump’s Narrow Window to Spread the Truth About Harris

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    Israel-Gaza war live updates: Hamas leader Ismail Haniyeh assassinated in Iran, group says

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    PAP Boss to Niger Delta Youths, Stay Away from the Protest

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Court Restricts Protests In Lagos To Freedom, Peace Park

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Fans React to Jazz Jennings’ Inspiring Weight Loss Journey

    Trending Tags

    • Trump Inauguration
    • United Stated
    • White House
    • Market Stories
    • Election Results
  • Science
  • Sports
  • Technology
    ASE Technology (ASX) Hits Record High on AI Fuel – uk.finance.yahoo.com

    ASE Technology Rockets to New Heights Driven by Game-Changing AI Breakthroughs

    Tri-Counties Bank marks 50 years of growth with focus on technology and personal service – thebusinessjournal.com

    Tri-Counties Bank Celebrates 50 Years of Growth Driven by Technology and Personal Service

    AI will reshape internet, create jobs in West Virginia says High Technology Foundation’s Estep – WV News

    How AI Is Set to Transform the Internet and Boost Job Growth in West Virginia

    Industry partner provides Ferris State Plastics Engineering Technology students with state-of-the-art equipment to gain in-demand skills – Ferris State University

    Industry Partner Equips Ferris State Plastics Engineering Students with Cutting-Edge Technology to Boost In-Demand Skills

    Health Technology Ecosystem – Centers for Medicare & Medicaid Services | CMS (.gov)

    Discover the Future of Health Technology: Innovations Revolutionizing Patient Care

    Coherent Joins LLNL’s STARFIRE Diode Technology Working Group to Advance Inertial Fusion Energy – GlobeNewswire

    Coherent Partners with LLNL’s STARFIRE Team to Drive Breakthroughs in Inertial Fusion Energy

    Trending Tags

    • Nintendo Switch
    • CES 2017
    • Playstation 4 Pro
    • Mark Zuckerberg
No Result
View All Result
Earth-News
No Result
View All Result
Home Science

400 years of telescopes: A window into our study of the cosmos

July 21, 2024
in Science
400 years of telescopes: A window into our study of the cosmos
Share on FacebookShare on Twitter

Astronomy: a 40-foot telescope constructed by William Herschel, in use outdoors. Coloured etching, 18--. Wellcome Collection. Public Domain Mark.

Astronomy: a 40-foot telescope constructed by William Herschel, in use outdoors. Coloured etching, 18–. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection

The first telescopes, known as refracting telescopes, were built in the early 17th century by Dutch eyeglass makers. They employed a pair of lenses—one convex fitted at the end of the scope, and one concave for the eyepiece. For the most part, these scopes were used to survey land and for military exploits. Italian astronomer Galileo Galilei was among the first to point such spyglasses at the sky. 

Johannes Kepler, a German astronomer, improved upon the convex-concave design with a pair of convex lenses. The advantage was a wider field of view and higher magnification, but the images appeared upside down. Still, telescope makers who implemented Kepler’s design were able to achieve 100 times magnification with telescopes as long as 150 feet. Such long tubes, however, did not fare well in wind and weather, making them somewhat ineffective.

Sir Isaac Newton offered an alternative design based on reflection, or curved mirrors, which captured more light and avoided the distorting prism effect that happens when light passes through a lens, known as chromatic aberration.

For more than two centuries, mirror size, material, and quality continued to increase—as did telescope sizes, until the space era when space-based telescopes, like Hubble and James Webb, eliminated the interference from Earth’s atmosphere. With James Webb, we’re able to peer farther than ever across the universe, spying some of the first galaxies to form after the Big Bang more than 13 billion years ago. 

Today, NASA has multiple space-based telescope projects underway, including the Nancy Grace Roman telescope and Habitable Worlds observatory.

1609: Refracting telescopes

Image Title: “Galileo offering his telescope to three women (possibly Urania and attendants) seated on a throne; he is pointing toward the sky where some of his astronomical discoveries are depicted.” (circa 1655). Image Source: Library of Congress Washington, D.C. 20540 USA Digital ID: http://hdl.loc.gov/loc.pnp/cph.3c10447

Inspired by Dutch and Danish telescope makers, Galileo built his own in 1609. His first telescope offered 3x magnification. Over the years, his design improved. His final telescope could magnify objects as much as 30 times.

1610: Moon Illustrations from Galileo’s own drawings in Sidereus Nuncius (The Starry Messenger)

Image Source: Library of Congress Washington, D.C. 20540 USA  Digital ID: http://hdl.loc.gov/loc.rbc/General.67904.1 

Fortunately, Galileo was not only a gifted astronomer but also an accomplished artist, enabling him to capture detailed images of the cosmic objects he spied through his lens. This sketch of the Moon revealed never before seen—or contemplated—lunar mountains and craters.

1672: Sir Isaac Newton’s reflecting telescope

Sketch of Newton’s telescope. Image Source: Library of Congress Washington, D.C. 20540 USA. Digital ID: cph 3c10449 //hdl.loc.gov/loc.pnp/cph.3c10449 LCCN Link: https://lccn.loc.gov/2006690472 

When light passes through glass, it is separated into color bands (ROYGBIV), which meant that refracting telescopes suffered from chromatic aberrations that affected image quality. Seeking to overcome the prism effect, Sir Isaac Newton built a reflecting telescope that used curved mirrors instead.

Laurent Cassegrain improved upon Newton’s design in 1672 by using a concave primary mirror and a convex secondary mirror to reflect light back through a hole in the primary mirror to the eyepiece, enabling a long focal length in a compact tube.

1789: Herschelian telescope

Image Credit: The University of Chicago Library

Sir William Herschel’s telescope was a reflecting design with a large primary mirror and an eyepiece positioned off-axis to avoid obstructing the light path. This allowed for larger mirrors and greater light-gathering power.

With one of his telescopes, Herschel spied a new planet, which he named Georgium Sidus for King George III. The planet was later named Uranus.

Image Credit: The University of Chicago Library

Herschel’s drawings of nebulae from “The Scientific Papers of Sir William Herschel” published in London in 1912 by the Royal Society and the Royal Astronomy Society.

1900: The Great Telescope of the Paris Exposition

Image Credit: Journal for the History of Astronomy (ISSN 0021-8286), Vol. 38, Part 4, No. 133, p. 459 – 475 (2007)

This 57-meter reflecting telescope—more than half the length of a football field—was built by Paul Gautier for the 1900 Paris Exposition. It had a 1.25-meter diameter mirror.

1917: Hooker Telescope 

LOS ANGELES, CA-SEPTEMBER 23, 2023:Overall, shows the exterior of the Mount Wilson Observatory. October 5 marks the 100th anniversary of Astronomer Edwin Hubble's famous discovery that our galaxy is only one of countless in a vast universe. Hubble made this discovery by using the Hooker telescope. (Mel Melcon / Los Angeles Times via Getty Images)The exterior of the Mount Wilson Observatory. Credit: Mel Melcon / Los Angeles Times via Getty Images Mel Melcon

Designed by George Ellery Hale, the Hooker telescope at Mount Wilson Observatory used a 100-inch diameter mirror, making it the largest telescope in the world at the time. It significantly advanced the study of galaxies and nebulae.

Edwin Hubble used the Hooker telescope in the 1920s and later, which paved the way for our understanding that the universe was much bigger than just our galaxy, and the Big Bang theory.

Mount Wilson and Plaomar Observatories Mars views a, b, c taken in red light showing rotation; d) taken in blue light. Cat # 272 Taken with Palomar Observatories 100 inch telescope.Hooker Telescope images of Mars, September 11, 1956. “Mount Wilson and Plaomar Observatories Mars views a, b, c taken in red light showing rotation; d) taken in blue light. Cat # 272 Taken with Palomar Observatories 100 inch telescope.” Image Credit: Carnegie Institute of Science via NASA.

1990: Hubble Space Telescope

This image of NASA’s Hubble Space Telescope was taken on May 19, 2009 after deployment during Servicing Mission 4. Credit: NASA.

Built by NASA and the European Space Agency (ESA), the Hubble Space Telescope is a space-based reflecting telescope with a 2.4-meter diameter mirror. It operates in Earth’s orbit above  the atmosphere. When it began operation, it offered unprecedented clarity and detail in its observations of the universe. 

NASA expects the telescope to remain operational through the end of the 2020s.

Double Cluster NGC 1850. From NASA: “NGC 1850, imaged here with the Hubble Space Telescope, is an unusual double cluster that lies in the bar of the Large Magellanic Cloud, a satellite galaxy of our own Milky Way. “The two components of the cluster are both relatively young and consist of a main, globular-like cluster in the center and an even younger, smaller cluster, seen below and to the right, composed of extremely hot, blue stars and fainter, red stars. The main cluster is about 50 million years old; the smaller cluster is only 4 million years old.” Image Credit: NASA, ESA, and Martino Romaniello (European Southern Observatory, Germany)

2021: James Webb Space Telescope 

Image Credit: NASA

A collaboration of NASA, ESA, and the Canadian Space Agency (CSA), the James Webb Space Telescope is an advanced space-based reflecting telescope with a 6.5-meter diameter segmented mirror.

It operates in the infrared spectrum, allowing it to observe distant galaxies, exoplanets, and other celestial phenomena with exceptional sensitivity.

The Webb telescope orbits the Sun near the second Sun-Earth Lagrange point (L2), one million miles from Earth.

Image description: “Two interacting galaxies known as Arp 142 in a horizontal image taken in mid-infrared light. At left is NGC 2937, an elliptical galaxy that looks like a tiny teal oval and is nicknamed the Egg. At right is NGC 2936, a distorted spiral galaxy nicknamed the Penguin, which is significantly larger. A beak-like region points toward the Egg, but lies far above it. Where the eye would be is an opaque, almost washed-out pink spiral. This galaxy’s distorted pink, purple, and blue arms create the bird’s beak, back, and tail. The tail, which is closer to the Egg, is wide and layered, like a beta fish’s tail. The Penguin and the Egg appear very separate.” Image Credit: NASA

>>> Read full article>>>
Copyright for syndicated content belongs to the linked Source : Popular Science – https://www.popsci.com/science/telescopes-history/

Tags: sciencetelescope'sYears
Previous Post

How to connect an antenna to a TV: Watch movies, shows, and sports for free

Next Post

It’s sploot season: Animals strike a pose to chill out

The making of an ecological disaster in the Nicobar – The Hindu

How Human Actions Sparked an Ecological Disaster in the Nicobar Islands

September 9, 2025
Science is under siege from weaponised disinformation – posing a threat to human civilisation – The Guardian

Science is under siege from weaponised disinformation – posing a threat to human civilisation – The Guardian

September 9, 2025
Two Harvard Scientists Finalists for Blavatnik Award – Harvard Gazette

Two Harvard Scientists Advance as Finalists for Prestigious Blavatnik Award

September 9, 2025
Why group chats drain you more than actual conversations — even when you hardly say a word – VegOut

Why Group Chats Exhaust You More Than Real Conversations-Even When You Say Almost Nothing

September 9, 2025
ASE Technology (ASX) Hits Record High on AI Fuel – uk.finance.yahoo.com

ASE Technology Rockets to New Heights Driven by Game-Changing AI Breakthroughs

September 9, 2025
Mike White chats live with high school sports fans ahead of Week 3 – Pittsburgh Post-Gazette

Mike White chats live with high school sports fans ahead of Week 3 – Pittsburgh Post-Gazette

September 9, 2025
Grace for the World: Watch the Live Concert from Vatican City! – Disney Plus

Grace for the World: Watch the Live Concert from Vatican City! – Disney Plus

September 9, 2025
22 Timeless Money Maxims That Hold up in the Current Economy – Money Talks News

22 Timeless Money Maxims That Still Work in Today’s Economy

September 9, 2025
Jobs roundup: September 2025 | Blizzard Entertainment appoints Walter Kong SVP of live games/mobile development – GamesIndustry.biz

Blizzard Entertainment Names Walter Kong as SVP of Live Games and Mobile Development in September 2025 Jobs Update

September 9, 2025
State Health Care Spending Growth Trends Point to Need for Policy Action – Milbank Memorial Fund

Soaring State Health Care Costs Demand Immediate Policy Solutions

September 9, 2025

Categories

Archives

September 2025
MTWTFSS
1234567
891011121314
15161718192021
22232425262728
2930 
« Aug    
Earth-News.info

The Earth News is an independent English-language daily published Website from all around the World News

Browse by Category

  • Business (20,132)
  • Ecology (814)
  • Economy (832)
  • Entertainment (21,709)
  • General (16,943)
  • Health (9,874)
  • Lifestyle (846)
  • News (22,149)
  • People (835)
  • Politics (839)
  • Science (16,042)
  • Sports (21,332)
  • Technology (15,813)
  • World (814)

Recent News

The making of an ecological disaster in the Nicobar – The Hindu

How Human Actions Sparked an Ecological Disaster in the Nicobar Islands

September 9, 2025
Science is under siege from weaponised disinformation – posing a threat to human civilisation – The Guardian

Science is under siege from weaponised disinformation – posing a threat to human civilisation – The Guardian

September 9, 2025
  • About
  • Advertise
  • Privacy & Policy
  • Contact

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

No Result
View All Result

© 2023 earth-news.info

Go to mobile version