Revision summary
Jupiter stored early nebular gas that Earth did not keep, so it is a formation archive. Juno measures deep water, gravity, and the magnetic field from polar orbit. Water and core structure constrain how wet and how mixed the disc was. That disc story controls Earth’s water, metals, and bombardment history. Juno feeds models; it does not replace Earth and Moon samples.
Model answer
Flow diagram
flowchart TD J[Juno at Jupiter] --> W[Water ammonia] J --> C[Gravity core] J --> M[Dynamo magnetosphere] W --> N[Solar nebula] C --> N N --> E[Earth origin models]
Conclusion
- State clearly that Juno does not photograph early Earth; it supplies boundary conditions for solar-system formation models.
- Pair Juno with meteorites, lunar samples, and Earth geology rather than treating one orbiter as a full history of our planet.
Juno helps us understand Earth’s origin by measuring the first giant’s water, core, and magnetic engine, which are leftovers of the nebula that also built the terrestrial planets. Earth’s later evolution still needs its own rocks; Juno sets the family story in which those rocks make sense.
Quick related
Students also ask
-
"Inspite of adverse environmental impact, coal mining is still inevitable for development". Discuss.
Next question in the 2017 paper (Q6). View answer →
-
Does Juno study the Earth directly?
No. It studies Jupiter. Earth science uses those results because both planets formed from the same disc.
-
Why is water at Jupiter relevant to Earth?
Oxygen and water in the giant planet tell how ices were placed in the nebula, which affects how much water rocky planets could later receive.
PYQ trend
When UPSC asked this
Related PYQs from other years, newest first. Open a question to read it.
-
2017 · Q1 · GS I · 10 marks
How do you justify the view that the level of excellence of the Gupta numismatic art is not at all noticeable in later times? -
2017 · Q11 · GS I · 15 marks
The spirit of tolerance and love is not only an interesting feature of Indian society from very early times, but it is also playing an important part at the present. Elaborate. (250 words). -
2017 · Q12 · GS I · 15 marks
Examine how the decline of traditional artisanal industry in colonial India crippled the rural economy. (250 words). -
2017 · Q15 · GS I · 15 marks
Petroleum refineries are not necessarily located nearer to crude oil producing areas, particularly in many of the developing countries. Explain its implications. (250 words). -
2017 · Q18 · GS I · 15 marks
The women's questions arose in modern India as a part of the 19th century social reform movement. What are the major issues and debates concerning women in that period? (250 words). -
2016 · Q1 · GS I · 12 marks
Early Buddhist Stupa-art, while depicting folk motifs and narratives, successfully expounds Buddhist ideals. Elucidate. -
2016 · Q2 · GS I · 12 marks
Krishnadeva Raya, the king of Vijayanagar, was not only an accomplished scholar himself but was a also a great patron of learning and literature. Discuss. -
2016 · Q11 · GS I · 12 marks
With a brief background of quality of urban life in India, introduce the objectives and strategy of the 'Smart City Programme."
More from this paper
Q1 · UPSC Mains 2017 · GS I · 10 marks
How do you justify the view that the level of excellence of the Gupta numismatic art is not at all noticeable in later times?
Indian Heritage and Culture
Gupta gold showed the king as archer, lyrist, or horseman with Lakshmi or ritual reverses and Brahmi verse. Metal was relatively pure and the die work was sculptural. Post-Gupta and early medieval coins often debased metal and used stiff stock types. Sultanate and Mughal art followed another visual language. The claim holds for Gupta-style numismatic art, not for all later mint skill.
Q2 · UPSC Mains 2017 · GS I · 10 marks
Clarify how mid-eighteenth century India was beset with the spectre of a fragmented polity.
World's Physical Geography
After 1707 the Mughal emperor lost the capacity to rule provinces in fact. Nadir Shah and Abdali exposed Delhi’s military hollowness. Bengal, Awadh, Hyderabad, Marathas, Sikhs, and Mysore became separate armed powers. Panipat 1761 showed even the Marathas were not a single state. Company victories in the Carnatic and Bengal fitted into this broken order.
Q3 · UPSC Mains 2017 · GS I · 10 marks
Why did the 'Moderates' failed to carry conviction with the nation about their proclaimed ideology and political goals by the end of the nineteenth century?
The Freedom Struggle
Moderate goals were council seats, ICS, and drain critique, not immediate independence. Methods were petitions and annual sessions that missed peasant and mill-hand life. The social base was presidency professionals speaking English public language. 1892 reforms were too small to prove the method worked. By the century’s end a hotter nationalist mood found them unconvincing.
Toppers' copies
Toppers' copies for this question will be uploaded soon.