Research any topic before you write.

Find related topics. | Discover entities. | See connections. | Build a topical map.

GRAIL: Science, Mission profile & Objectives

The Gravity Recovery and Interior Laboratory (GRAIL) was an American lunar science mission in NASA's Discovery Program which used high-quality gravitational field mapping of the Moon to determine its interior structure. The two small spacecraft, GRAIL A (Ebb) and GRAIL B (Flow), were launched on 10 September 2011 aboard a single launch vehicle: the…

Language: English [EN]
Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.
100%
More settings
100% 100% 100% 100% 100%

GRAIL topic overview

The analysis highlights Science, Mission profile and Objectives as prominent areas in the source structure around GRAIL.

Related topics
45
Source areas
5
Connected nodes
50
Extracted relationships
153
Concept neighborhoods
17
Bridge connections
50

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Mission profile · 16 topics
Overview · 13 topics
Objectives · 8 topics
Results · 4 topics
Spacecraft · 4 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Aposelene altitude
86 km (53 mi)
Bus
XSS-11
Contractor
United Launch Alliance
COSPAR ID
2011-046A 2011-046B
Decay date
December 17, 2012
Disposal
Deorbited

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

Objectives

Spacecraft

Mission profile

Results

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How GRAIL connects Entity context

The extracted context around GRAIL shows recurring relationship patterns in the source. For example, GRAIL → Bozeman, By, Changes, Columbia, District, Each, Earth-based, Ebb, Emily Dickinson Elementary School, Flow, GRAIL's, Maria Zuber, Massachusetts Institute, Montana, Moon, NASA, NASA's Jet Propulsion Laboratory, Nearly, Puerto Rico, Technology Another extracted example is GRAIL → Analyses, Combining, Early, Gravity, In, Long, Lunar Laser Ranging, Maps, Moon, Muller, Sjogren, Strong, Subsequent, The, The Orientale, Topography, Where. Use these groups to spot repeated connection types before inspecting the individual relationships.

GRAIL

Top relations

related to overview · 23
GRAIL → Bozeman, By, Changes, Columbia, District, Each, Earth-based, Ebb, Emily Dickinson Elementary School, Flow, GRAIL's, Maria Zuber, Massachusetts Institute, Montana, Moon, NASA, NASA's Jet Propulsion Laboratory, Nearly, Puerto Rico, Technology
related to Results · 17
GRAIL → Analyses, Combining, Early, Gravity, In, Long, Lunar Laser Ranging, Maps, Moon, Muller, Sjogren, Strong, Subsequent, The, The Orientale, Topography, Where
related to External links · 14
GRAIL → AM, Archived, Behind The Scenes, Day One, GRAIL Home Page Archived, Gravity Recovery, Interior Laboratory, Mission NASANASA GRAIL, My NASA GRAIL Experience, New Worlds New Discoveries, Retrieved, Wayback Machine, Wayback MachineNASA, Wayback MachineNASA Science Missions
related to Final experiment and mission end · 14
GRAIL → American, At, Both, Data, December, Each, Ebb, Flow, Main, Mouchez, NASA, Philolaus, Sally Ride, The
related to Objectives · 13
GRAIL → Ascertain, August, December, Map, March, May, Moon, Moon's, MoonDetermine, MoonPlace, NASA, On, The
related to Instruments · 12
GRAIL → Climate Experiment, Each MoonKAM, GRACE, Gravity Recovery, Ka, LGRS, Lunar Gravity Ranging System, Middle, Moon Knowledge Acquired, MoonKAM, Radio, RSB
related to Launch attempts · 11
GRAIL → All, Cape Canaveral Air Force, EDT, Fire, II Heavy, North American Eastern Daylight, Spacecraft, Station, Time, United Launch Alliance Delta, UTC
related to Science phase · 10
GRAIL → Aug, Climate Experiment, Dec, GRACE, Gravity Recovery, It, March, May, The, XSS-11
related to Transit phase · 8
GRAIL → Apollo, L1, Moon, Moon's, Sun-Earth Lagrange, The, This, Unlike
Impact date · 2
GRAIL → December 17, 2012, 22:28:51 UTC, December 17, 2012, 22:29:21 UTC

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

spacecraft lunar gravity moon mission launch 2012 science phase nasa field two data december recovery interior ebb orbit one moonkam

GRAIL relationships Subject–Predicate–Object triples

TTTA extracted 153 structured relationships around GRAIL. Examples in this analysis include GRAIL → Aposelene altitude → 86 km (53 mi) and GRAIL → Bus → XSS-11. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
GRAILAposelene altitude86 km (53 mi)1.00infobox
GRAILBusXSS-111.00infobox
GRAILContractorUnited Launch Alliance1.00infobox
GRAILCOSPAR ID2011-046A 2011-046B1.00infobox
GRAILDecay dateDecember 17, 20121.00infobox
GRAILDisposalDeorbited1.00infobox
GRAILDry mass132.6 kg (292 lb)1.00infobox
GRAILEntered serviceDecember 31, 2011 (Ebb) January 1, 2012 (Flow)1.00infobox
GRAILImpact dateDecember 17, 2012, 22:28:51 UTC1.00infobox
GRAILImpact dateDecember 17, 2012, 22:29:21 UTC1.00infobox
GRAILImpact site.mw-parser-output .geo-default,.mw-parser-output .geo-dms,.mw-parser-output .geo-dec{display:inline}.mw-parser-output .geo-nondefault,.mw-parser-output .geo-multi-punct,.mw-pars…1.00infobox
GRAILImpact site75°39′01″N 33°09′51″E / 75.6504°N 33.1643°E / 75.6504; 33.16431.00infobox
GRAILLaunch dateSeptember 10, 2011, 13:08:52.775 (2011-09-10UTC13:08:52Z) UTC1.00infobox
GRAILLaunch mass202.4 kg (each)1.00infobox
GRAILLaunch siteCape Canaveral SLC-17B1.00infobox
GRAILManufacturerMIT Lockheed Martin1.00infobox
GRAILMission duration1 year, 3 months and 7 days1.00infobox
GRAILMission typeLunar orbiters1.00infobox
GRAILNamesGRAIL1.00infobox
GRAILOperatorNASA / JPL1.00infobox
GRAILPeriod113 minutes1.00infobox
GRAILPeriselene altitude25 km (16 mi)1.00infobox
GRAILPower(Solar array / Li-ion battery)1.00infobox
GRAILReference systemSelenocentric1.00infobox
GRAILRegimePolar orbit1.00infobox
GRAILRocketDelta II 7920H-10 D-3561.00infobox
GRAILSATCAT no.37801 378021.00infobox
GRAILSemi-major axis1,788.0 km (1,111.0 mi)1.00infobox
GRAILSpacecraft componentEbb1.00infobox
GRAILSpacecraft componentFlow1.00infobox

Related concept clusters Concept neighborhoods

The concept neighborhoods around GRAIL bring nearby vocabulary together. In this analysis, examples include Launch, Nasa and Moon. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • GRAIL
    • Launch
    • Nasa
    • Moon
    • Science
    • Laboratory
    • Interior
    • Recovery
    • Gravity
    • Spacecraft
    • Mission
    • Program
    • Days
  • grail
    • Launch
    • Nasa
    • Moon
    • Science
    • Laboratory
    • Interior
    • Recovery
    • Gravity
    • Spacecraft
    • Mission
    • Program
    • Days
  • gravity recovery and climate experiment
    • Experiment
    • Recovery
    • Field
    • Used
    • Science
    • Mission
    • Nasa
    • Lunar
    • Gravity
    • Laboratory
    • Interior
    • Moon
  • lunar reconnaissance orbiter
    • Mission
    • Orbits
    • Surface
    • Spacecraft
    • Impacted
    • Km
    • Recovery
    • Phase
    • Science
    • Experiment
    • System
    • Used
  • lunar laser ranging
    • Mission
    • Orbits
    • Surface
    • Spacecraft
    • Impacted
    • Km
    • Recovery
    • Phase
    • Science
    • Experiment
    • System
    • Used
  • mission profile
    • Science
    • Phase
    • Program
    • Spacecraft
    • Used
    • Days
    • Recovery
    • Nasa
    • Moon
    • Launch
    • Experiment
    • Impact
  • moon
    • Program
    • Days
    • Impact
    • Data
    • Science
    • Orbit
    • Recovery
    • Nasa
    • Spacecraft
    • Crust
    • Flow
    • Orbits
  • united launch alliance
    • Spacecraft
    • Mission
    • Program
    • Nasa
    • Two
    • Science
    • Experiment
    • Followed
    • Second
    • Small
    • Surface
    • System

Connections between topic areas Semantic bridges

For GRAIL, one of the stronger structural bridges in this analysis connects GRAIL with Mission profile. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
GRAIL — Mission profile · splits 34 ⟂ 17
GRAIL — Overview · splits 37 ⟂ 14
GRAIL — Objectives · splits 42 ⟂ 9
GRAIL — Spacecraft · splits 46 ⟂ 5
GRAIL — Results · splits 46 ⟂ 5

Map overview Semantic statistics

GRAIL

Nodes51
Edges50
Triples153
Avg. degree1.96
Density0.039216
Components1

Source & methodology

TTTA analyzes the structure around GRAIL to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Science, Mission profile & Objectives, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — GRAIL · EN edition · Analysis: TopicsToTalkAbout

For writers, content strategists, SEOs, marketers and creators — from quick topic research to advanced semantic analysis.