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Planetary Defense Coordination Office

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Planetary Science Division

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Science Mission Directorate

Near-Earth Asteroids as of September 2023

September 2023 Each month, NASA’s Planetary Defense Coordination Office releases a monthly update featuring the most recent figures on NASA’s planetary defense efforts, near-Earth object close approaches, and other timely facts about comets and asteroids that could pose an impact hazard with Earth. Here is the what we’ve found for September.

Posted September 29, 2023

Astrophysics Division

Goddard Space Flight Center

Hubble Space Telescope

Nebulae

Science Mission Directorate

Living on the Edge: Supernova Bubble Expands in New Hubble Time-Lapse Movie

Though a doomed star exploded some 20,000 years ago, its tattered remnants continue racing into space at breakneck speeds – and NASA’s Hubble Space Telescope has caught the action. The nebula, called the Cygnus Loop, forms a bubble-like shape that is about 120 light-years in diameter. The distance to its center is approximately 2,600 light-years.

Posted September 29, 2023

Astrophysics Division

Goddard Space Flight Center

Hubble Space Telescope

Nebulae

Science Mission Directorate

Hubble Views a Glistening Red Nebula

Just in time for the fall foliage season, this image from the NASA/ESA Hubble Space Telescope features a glistening scene in red. It reveals a small region of the nebula Westerhout 5, which lies about 7,000 light-years from Earth. Suffused with bright red light, this luminous image hosts a variety of interesting features, including a […]

Posted September 29, 2023

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William R. Pogue

1

NISAR (NASA-ISRO Synthetic Aperture Radar)

10

Pluto

1

Gamma-Ray Bursts

10

15

Air Traffic Control Labs

1

1

SimLabs

2

STS-41B

3

Lunar Discovery & Exploration Program

1

14

5

Bruce McCandless

2

SOFIA (Stratospheric Observatory for Infrared Astronomy) / 747-SP

2

STS-88

1

MAF Status

1

NASA Open Source Software

1

Super-Earth Exoplanets

9

Deimos

1

VIPER (Volatiles Investigating Polar Exploration Rover)

16

2

Natural Disasters

20

People of Armstrong

2

Fission Surface Power (FSP)

2

Heliophysics Research Program

3

2023 Solar Eclipse

9

Asteroids

37

9

Spot the International Space Station

3

Landsat 8 / LDCM (Landsat Data Continuity Mission)

3

MAVEN (Mars Atmosphere and Volatile EvolutioN)

10

Commercial Space Division

1

The Kuiper Belt

4

Edward G. Gibson

1

Office of Small Business Programs (OSBP)

11

Project Management & Systems Engineering

1

Geospace Dynamics Constellation (GDC)

1

Infrared Space Observatory (ISO)

1

Quesst: The Team

3

GOES-R

3

IRIS (Interface Region Imaging Spectrograph)

1

Apollo 15

1

Careers

9

Sounds & Ringtones

1

1

SWOT (Surface Water and Ocean Topography)

13

Droughts

1

Water & Energy Cycle

5

23

Pioneer 10

1

4

Human Dimensions

2

12

Atmospheric Waves Experiment (AWE)

2

Sea Ice

5

STEREO (Solar TErrestrial RElations Observatory)

2

7

4

COSI (Compton Spectrometer and Imager)

1

Transformational Tools Technologies

7

ER-2

4

Opportunities For Students to Get Involved

33

Recent Posts

25 Years of NASA Student Launch

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What NASA Is Learning from the Biggest Geomagnetic Storm in 20 Years

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Sols 4534-4535: Last Call for the Layered Sulfates? (West of Texoli Butte, Headed West)

May 9, 2025