DRO meaning in Academic & Science ?

Answer:

What is Distant Retrograde Orbit mean?

A distant retrograde orbit (DRO), as most commonly conceived, is a spacecraft orbit around a moon that is highly stable because of its interactions with two Lagrange points (L1 and L2) of the planet-moon system.

In more general terms, an object of negligible mass can be in a DRO around the smaller body of any two-body system, such as planet–Sun or exoplanet–star.

Using the example of a spacecraft in a DRO around a moon, the craft would orbit in the direction opposite to the direction in which the moon orbits the planet. The orbit is "distant" in the sense that it passes above the Lagrange points, rather than being near the moon. If we consider more and more distant orbits, the synodic period (the period between two moments when the craft passes between the planet and the moon) gets longer and approaches that of the moon going around the planet, so that the sidereal period (the time it takes for the craft to come back to a given constellation as viewed from the moon) can become much longer than the orbital period of the moon. An example with Europa has a sidereal period about eight times the orbital period of Europa,

DROs have been researched for several decades, but as of 2021, no spacecraft have used such an orbit for an actual flight.

reference

Full Form	Category
Distant Retrograde Orbit	Academic & Science
Deep Resonant Orbit	Academic & Science
Durango (co)	Airport Code
Discovered Resources Opportunities	Community
Digital Readout	Computer Hardware
Destructive Read Out	Computing
Data Replication Option	Computing
Data Request Output	Computing
Dynamic Range Optimizer	Computing
Direct Runoff	Earth Science
Dielectric Resonator Oscillator	Electronics
Dynamic Routing Optimization	General
Drag Racing Online	General
Distributionally Robust Optimization	General
Discos Radioactivos Organizados	General
Derbyshire Record Office	General
Domestic Relations Office	General
Decision Review Officer	General
Differential Reinforcement of Other	General
Detention and Removal Operations	General
Debt Relief Order	General
Diversity Resource Office	General
Dynamic Range Optimization	General
Data Replication Optimization	General
Design Review Overlay	General
Decision Risk and Operations	General
Davidson River Outfitters	General
Dication Reason and Order	General
Diesel Range Organics	Governmental
Displaced Residency Order	Governmental
Domestic Relations Order	Governmental
Division of Regional Operations	Governmental
Deputy Returning Officer	Governmental
DARYAOGONJ	Indian Railway Station
Da Real Ones	Internet
Dirtty Rotten One	Internet
Differential Reinforcer of Other Behaviour	Medical
Dental Reference Officer	Medical
differential reinforcement of other behaviours	Medical
Disability Rights Office	Medical
Disability Rights Oregon	Medical
Disability Rights Ohio	Medical
Disability Resource Office	Medical
Design Requirements Overview	Military and Defence
Disposal Release Order	Military and Defence
Departmental Requirements Office	Military and Defence
Durango, Colorado USA	Regional
District Revenue Officer	Regional
Document Release Order	Space Science