V. V. Giri • World Biofuel Day • Smithsonian • Lunar Orbiter 1 • Magellan at Venus
Today in History on August 10: Important Events, Births, GK and MCQs
August 10 is particularly useful for Indian polity, energy current affairs and science history. Former President Varahagiri Venkata Giri was born on August 10, 1894, while India observes World Biofuel Day every August 10 to promote awareness of biofuels.
Internationally, the date marks the sinking of the Swedish warship Vasa in 1628, the legal establishment of the Smithsonian Institution in 1846, NASA's launch of Lunar Orbiter 1 in 1966 and the arrival of Magellan in orbit around Venus in 1990.
For 2026 preparation, the biofuel section uses only the latest Government of India figures available as of August 8, 2026; no unverified 2026 World Biofuel Day slogan has been inserted.
August 10 in History: Quick Summary
| Year | Historical Event | Exam Area |
|---|---|---|
| 1628 | The Swedish warship Vasa sank on its maiden voyage in Stockholm harbour. | Maritime History |
| 1846 | The Smithsonian Institution was established by an Act signed into law. | Institutions |
| 1894 | V. V. Giri, later the fourth President of India, was born. | Indian Polity |
| 1966 | NASA launched Lunar Orbiter 1 toward the Moon. | Space Science |
| 1990 | NASA's Magellan spacecraft entered orbit around Venus. | Space Science |
| 2015 | India began observing World Biofuel Day annually on August 10. | Energy GK |
| 2026 | Government data continues to highlight the E20 programme and E85 flex-fuel promotion. | Current Affairs |
August 10 in Indian History
Birth of V. V. Giri
Varahagiri Venkata Giri was born on August 10, 1894 in Berhampur, Odisha.
He served as the fourth President of India from August 24, 1969 to August 24, 1974 and had earlier served as Vice-President. He was known for his long association with the labour movement and workers' rights.
World Biofuel Day – India Focus
The Government of India observes World Biofuel Day on August 10 every year to promote biofuels and awareness of cleaner fuel alternatives.
Latest official figures available before August 10, 2026 show average ethanol blending of 19.05% in Ethanol Supply Year 2024–25. Government material also records that India's ethanol production capacity had risen to nearly 20 billion litres, and an E85 flex-fuel promotion initiative was launched on World Environment Day, June 5, 2026.
Major World Historical Events on August 10
Swedish Warship Vasa Sank
On August 10, 1628, the Swedish warship Vasa foundered in Stockholm harbour only minutes into its maiden voyage.
The vessel travelled only about 1,300 metres before capsizing. The preserved ship is today the centrepiece of the Vasa Museum in Stockholm.
Smithsonian Institution Established
On August 10, 1846, legislation establishing the Smithsonian Institution was signed into law by U.S. President James K. Polk.
The institution arose from the bequest of British scientist James Smithson and was created for the “increase and diffusion of knowledge”.
NASA Launched Lunar Orbiter 1
NASA launched Lunar Orbiter 1 on August 10, 1966 to photograph potential Apollo landing sites on the Moon.
It entered lunar orbit on August 14 and became the first U.S. spacecraft to orbit the Moon. On August 23, it took the first photograph of Earth from lunar orbit.
Magellan Entered Orbit Around Venus
NASA's Magellan spacecraft arrived at Venus and entered a near-polar orbit on August 10, 1990.
Magellan used radar to map the cloud-covered surface of Venus in unprecedented detail and became one of the landmark planetary-mapping missions.
Important Days and Current Affairs on August 10
World Biofuel Day
Observed every August 10 in India to promote biofuels and awareness of alternatives to fossil fuels.
Official Government replies explicitly identify August 10 as the annual observance date.
India's Ethanol Programme
Average ethanol blending reached 19.05% in ESY 2024–25 according to Government of India material.
On June 5, 2026, an E85 flex-fuel promotion event was launched at an IOCL retail outlet.
Important Births and Personalities
V. V. Giri
Fourth President of India and a prominent labour leader.
Served as President from 1969 to 1974 and received the Bharat Ratna in 1975.
James Smithson
British scientist whose bequest led to the creation of the Smithsonian Institution in the United States.
The U.S. legislation establishing the institution was signed on August 10, 1846.
Static GK Connections for Competitive Exams
1. V. V. Giri – Polity Facts
- Born: August 10, 1894
- Birthplace: Berhampur, Odisha
- President: 4th President of India
- Presidential term: 1969–1974
- Bharat Ratna: 1975
2. World Biofuel Day
- Date: August 10
- Purpose: Promote awareness of biofuels
- Key Indian programme: Ethanol Blended Petrol (EBP)
- Official blending figure: 19.05% in ESY 2024–25
3. Lunar Orbiter 1
- Launch: August 10, 1966
- Entered lunar orbit: August 14, 1966
- First: First U.S. spacecraft to orbit the Moon
- Earth image from lunar orbit: August 23, 1966
4. Magellan
- Target: Venus
- Orbit arrival: August 10, 1990
- Technique: Radar mapping
- Agency: NASA
Memory Trick for August 10
Remember: V–S–L–M–B
Vasa 1628 → Smithsonian 1846 → V. V. Giri 1894 → Lunar Orbiter 1966 → Magellan 1990 → Biofuel Day.
Do Not Confuse
1. V. V. Giri's number in presidential order
V. V. Giri was the fourth President of India, not the fourth person to act as President in every temporary constitutional circumstance.
2. World Biofuel Day theme
As of August 8, 2026, this post does not state a special 2026 theme because an official theme was not verified. The observance date and programme data are verified.
3. Lunar Orbiter 1 milestones
August 10 = launch; August 14 = lunar orbit; August 23 = first Earth photograph from lunar orbit.
4. Explorer 6 vs Lunar Orbiter 1
Explorer 6 produced the first photograph of Earth from Earth orbit in 1959. Lunar Orbiter 1 produced the first Earth photograph from lunar orbit in 1966.
August 10 Quick Revision
- V. V. Giri was born on August 10, 1894.
- V. V. Giri served as the fourth President of India.
- World Biofuel Day is observed on August 10.
- India's average ethanol blending reached 19.05% in ESY 2024–25.
- The Vasa sank on August 10, 1628.
- The Smithsonian Institution was legally established on August 10, 1846.
- Lunar Orbiter 1 launched on August 10, 1966.
- Lunar Orbiter 1 was the first U.S. spacecraft to orbit the Moon.
- Magellan entered Venus orbit on August 10, 1990.
- Magellan used radar to map Venus.
10 MCQs
1. V. V. Giri was born on which date?
The President of India profile gives his birth date as August 10, 1894. Read the complete fact.
2. V. V. Giri served as which President of India?
He served as the fourth President of India from 1969 to 1974. Read the complete fact.
3. World Biofuel Day is observed in India on?
Government of India replies explicitly identify August 10 as the annual observance date. Read the complete fact.
4. What was India's average ethanol blending in ESY 2024–25 according to the latest official figure used here?
PIB's 2026 energy-transition material cites 19.05%. Read the complete fact.
5. Which famous Swedish warship sank on August 10, 1628?
Vasa sank in Stockholm harbour during its maiden voyage. Read the complete fact.
6. Which institution was established by U.S. law on August 10, 1846?
President James K. Polk signed the establishing act on August 10, 1846. Read the complete fact.
7. Lunar Orbiter 1 was launched on?
NASA lists August 10, 1966 as the launch date. Read the complete fact.
8. What important 'first' is associated with Lunar Orbiter 1?
It entered lunar orbit on August 14, 1966. Read the complete fact.
9. NASA's Magellan mission targeted which planet?
Magellan used radar to map the surface of Venus. Read the complete fact.
10. Magellan entered Venus orbit on which date?
NASA records Venus orbit insertion on August 10, 1990. Read the complete fact.
Frequently Asked Questions
1. Why is August 10 important in Indian polity?
It is the birth anniversary of V. V. Giri, the fourth President of India.
2. When was V. V. Giri born?
August 10, 1894 in Berhampur, Odisha.
3. Which President number was V. V. Giri?
He was the fourth President of India.
4. When is World Biofuel Day observed?
August 10 every year.
5. What is the latest ethanol blending figure used in this post?
19.05% average blending in ESY 2024–25, as cited in Government of India material available before August 10, 2026.
6. What happened to Vasa on August 10, 1628?
The Swedish warship sank in Stockholm harbour during its maiden voyage.
7. When was the Smithsonian Institution established?
August 10, 1846.
8. When was Lunar Orbiter 1 launched?
August 10, 1966.
9. What was Lunar Orbiter 1's major first?
It became the first U.S. spacecraft to orbit the Moon.
10. When did Magellan enter Venus orbit?
August 10, 1990.
Related History and GK Posts
- August 9 in History
- August 8 in History
- Explore All Today in History Articles
- Static GK for Competitive Exams
Official and Reliable Sources
- President of India – V. V. Giri profile
- PIB – Utilisation of Biodiesel / World Biofuel Day
- PIB – Ethanol Blended Petrol Programme Q&A, July 2026
- PIB – India's Expanding Role in the Global Energy Transition
- Vasa Museum – The Disaster, 10 August 1628
- Smithsonian Institution – History
- NASA – Lunar Orbiter 1
- NASA – Magellan
Conclusion
August 10 combines Indian polity, clean-energy current affairs and major institutional and space-science milestones.
For exams, remember: V. V. Giri – World Biofuel Day – Smithsonian – Lunar Orbiter 1 – Magellan.
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