How many statements about Blue Moon MK1 lunar lander are correct?

Only two statements are correct. Blue Moon MK1 is a lunar lander developed by Blue Origin and its primary mission is to demonstrate vital capabilities necessary for a successful lunar landing. However, it does not carry crew; it is an unmanned cargo lander designed to deliver equipment and supplies to the Moon’s surface under NASA’s Artemis programme. It was tested in Thermal Vacuum Chamber A at NASA’s Johnson Space Center to simulate space conditions such as extreme cold and near-vacuum. The lander aims for the Moon’s south pole, a region believed to contain water ice resources.

What are the main sources of infrasound in urban environments?

Common sources of infrasound include air conditioners, ventilation systems, wind turbines, industrial machinery, traffic, pipes, and mechanical systems inside large buildings. Infrasound refers to sound waves below the human hearing threshold. Although not audible, prolonged exposure may trigger measurable stress responses and negative emotions. Wind turbines are also recognized as significant sources, especially in expanding renewable energy regions.

What is a circumbinary planet?

A circumbinary planet is an exoplanet that orbits two stars instead of one. These planets revolve around a binary star system, often at a stable distance from both stars. Sometimes called 'Tatooine worlds' after the fictional Star Wars planet, recent astronomical studies have identified multiple circumbinary planet candidates located between 650 and 18,000 light years from Earth.

What causes Type 1 diabetes and is it related to lifestyle?

Type 1 diabetes is an autoimmune condition in which the body’s immune system attacks the pancreas, preventing it from producing insulin. It is a lifelong disease and is not caused by excessive sugar consumption or unhealthy lifestyle habits. Without insulin, blood sugar levels rise, leading to symptoms such as fatigue, weight loss, excessive thirst, and blurred vision. Research institutions such as Karolinska Institutet and KTH Royal Institute of Technology are exploring stem cell-based therapies to restore insulin production.

Why is cerebrospinal fluid important for brain health?

Cerebrospinal fluid (CSF) is essential for removing metabolic waste and byproducts from the brain. Research shows that natural body movements, including breathing and abdominal muscle contractions, create pressure changes that gently move the brain and help circulate CSF across its surface. This movement supports a natural cleansing mechanism that contributes to nervous system health and may explain the positive link between physical activity and brain function.

Daily UPSC Prelims MCQs - Science & Tech. - 20th May 2026

Devesh
May 20
1 min read

Test your UPSC CSE 2026 preparation with today’s Science & Technology (Every wednesday) Quiz — covering Blue Moon MK1, sources of Infrasound, circumbinary planet, Type 1 diabetes, cerebrospinal fluid and more.

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