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Current AffairsScience & Technology

Blue moon in May 2026: Why it happens and how to watch it

Thursday, 21 May 20261 min read194 words22

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📝 AI-generated analysis for exam preparation. This is original educational content curated for competitive exam aspirants.

Science & Technologyenvironmentspacescience and technology

This article explains a celestial phenomenon relevant to science and technology sections of UPSC and SSC exams. Prelims may test definitions and historical context of blue moons; mains could cover astronomical events and their causes. The connection to the Krakatoa eruption also touches on atmospheric science and disaster impacts, adding interdisciplinary value.

Key Takeaways

  • 1

    A blue moon occurs when two full moons appear in a single calendar month; the second full moon is called a blue moon under the modern definition.

  • 2

    The modern definition of blue moon became popular in 1946 when writer James Hugh Pruett misinterpreted old copies of the Maine Farmers’ Almanac.

  • 3

    There is also an older seasonal definition: when an astronomical season has four full moons instead of three, the third full moon is called a blue moon; the next seasonal blue moon will occur on 20 May 2027.

  • 4

    The name 'blue moon' is a calendrical term and has nothing to do with the Moon’s actual colour.

  • 5

    One rare occasion when the Moon genuinely appeared blue was after the 1883 Krakatoa eruption, when smoke and dust particles about 1 micron wide scattered red light and allowed blue light to pass through more easily.

What can be asked in exam?

  • •Prelims angle: factual question on key term, scheme, or institution mentioned in this article.
  • •Mains angle: short analytical answer on policy impact, challenges, and way forward.

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OPSC PYQ 1 (2022) — Science

Genetic engineering, a revolutionary branch of biotechnology, continues to evolve rapidly, transforming the way we approach medicine, agriculture and various scientific endeavours. Recent developments in this field highlight both the immense potential and ethical considerations that come with the power to manipulate DNA. In the medical realm, gene editing technologies like CRISPR-Cas9 have gained prominence. These tools offer unprecedented precision in modifying genes, holding promise for treating genetic disorders. In a groundbreaking clinical trial, researchers successfully used gene editing to treat sickle cell anaemia. The patient’s own modified cells were reintroduced into their body, resulting in reduced symptoms and an improved quality of life. In agriculture, genetic engineering is driving advancements in crop production and food security. The development of Genetically Modified (GM) crops has enabled plants to resist pests, withstand harsh climates and improve nutritional content. For instance, GM rice has been biofortified to contain higher levels of essential vitamins, potentially combating malnutrition in regions where rice is a staple food. However, these advancements also raise ethical concerns. The potential for creating “designer babies” through gene editing has sparked debates about the boundaries of genetic manipulation. The question of whether it’s ethical to alter human DNA to enhance physical or cognitive traits continues to challenge bioethicists, policymakers and society at large. Data indicates the exponential growth of genetic engineering research. In the past decade, the number of scientific publications related to CRISPR technology has multiplied significantly. In 2010, there were approximately 150 CRISPR-related publications; by 2020, that number had soared to over 9,000. This surge demonstrates the profound impact of genetic engineering on the scientific community. As we navigate this brave new world of genetic engineering, striking a balance between innovation and ethical considerations remains paramount. The potential to cure genetic diseases, enhance food security and make leaps in scientific understanding is immense. However, careful consideration and collaboration are necessary to ensure that the benefits are realized while addressing the ethical complexities that accompany these technological breakthroughs.

Which gene editing technology has gained prominence recently?

  1. It is used for creating GM crops
  2. It is a tool for gene editing
  3. It enhances physical traits
  4. It is used in biofortification

Answer: A. It is used for creating GM crops

OPSC PYQ 2 (2022) — English Comprehension

EMBEZZLE

In the following question, choose the word which best expresses the meaning of the given word: EMBEZZLE

  1. Misappropriate
  2. Balance
  3. Remunerate
  4. Clear

Answer: A. Misappropriate

OPSC PYQ 3 (2023) — Reasoning

How many pairs of letters are there in the word 'CASTRAPHONE' which have as many letters between them in the word as in the alphabet?

  1. 3
  2. 4
  3. 5
  4. 6

Answer: D. 6

Free sample · Question 1 of 3

Science · 2022

Direction / Passage

Genetic engineering, a revolutionary branch of biotechnology, continues to evolve rapidly, transforming the way we approach medicine, agriculture and various scientific endeavours. Recent developments in this field highlight both the immense potential and ethical considerations that come with the power to manipulate DNA. In the medical realm, gene editing technologies like CRISPR-Cas9 have gained prominence. These tools offer unprecedented precision in modifying genes, holding promise for treating genetic disorders. In a groundbreaking clinical trial, researchers successfully used gene editing to treat sickle cell anaemia. The patient’s own modified cells were reintroduced into their body, resulting in reduced symptoms and an improved quality of life. In agriculture, genetic engineering is driving advancements in crop production and food security. The development of Genetically Modified (GM) crops has enabled plants to resist pests, withstand harsh climates and improve nutritional content. For instance, GM rice has been biofortified to contain higher levels of essential vitamins, potentially combating malnutrition in regions where rice is a staple food. However, these advancements also raise ethical concerns. The potential for creating “designer babies” through gene editing has sparked debates about the boundaries of genetic manipulation. The question of whether it’s ethical to alter human DNA to enhance physical or cognitive traits continues to challenge bioethicists, policymakers and society at large. Data indicates the exponential growth of genetic engineering research. In the past decade, the number of scientific publications related to CRISPR technology has multiplied significantly. In 2010, there were approximately 150 CRISPR-related publications; by 2020, that number had soared to over 9,000. This surge demonstrates the profound impact of genetic engineering on the scientific community. As we navigate this brave new world of genetic engineering, striking a balance between innovation and ethical considerations remains paramount. The potential to cure genetic diseases, enhance food security and make leaps in scientific understanding is immense. However, careful consideration and collaboration are necessary to ensure that the benefits are realized while addressing the ethical complexities that accompany these technological breakthroughs.

Which gene editing technology has gained prominence recently?

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